# Bulk DNS & Domain Checker — Records, WHOIS & Expiry (`haketa/bulk-dns-checker`) Actor

Check thousands of domains at once: A/AAAA/MX/TXT/NS records, SPF/DMARC/DKIM, mail provider, registrar, creation & expiry dates, nameservers and DNSSEC. Fast, cheap, keyless DNS & domain lookup for IT, security and domain portfolios.

- **URL**: https://apify.com/haketa/bulk-dns-checker.md
- **Developed by:** [Haketa](https://apify.com/haketa) (community)
- **Categories:** Developer tools, Automation
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

from $0.70 / 1,000 results

This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events.
Since this Actor supports Apify Store discounts, the price gets lower the higher subscription plan you have.

Learn more: https://docs.apify.com/platform/actors/running/actors-in-store#pay-per-event

## What's an Apify Actor?

Actors are a software tools running on the Apify platform, for all kinds of web data extraction and automation use cases.
In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours,
and optionally produces a well-defined JSON output, datasets with results, or files in key-value store.
In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server.
Actors are written with capital "A".

## How to integrate an Actor?

If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.
The best way to integrate Actors is as follows.

In JavaScript/TypeScript projects, use official [JavaScript/TypeScript client](https://docs.apify.com/api/client/js.md):

```bash
npm install apify-client
```

In Python projects, use official [Python client library](https://docs.apify.com/api/client/python.md):

```bash
pip install apify-client
```

In shell scripts, use [Apify CLI](https://docs.apify.com/cli/docs.md):

````bash
# MacOS / Linux
curl -fsSL https://apify.com/install-cli.sh | bash
# Windows
irm https://apify.com/install-cli.ps1 | iex
```bash

In AI frameworks, you might use the [Apify MCP server](https://docs.apify.com/platform/integrations/mcp.md).

If your project is in a different language, use the [REST API](https://docs.apify.com/api/v2.md).

For usage examples, see the [API](#api) section below.

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).


# README

## Bulk DNS & Domain Checker — Records, Mail, WHOIS & Expiry

Look up the DNS and domain details of **thousands of domains at once.** Paste a list and get, for each one: **A/AAAA/MX/TXT/NS records, SPF/DMARC/DKIM, detected mail provider, registrar, creation & expiry dates, days-until-expiry and DNSSEC.**

Fast, cheap and keyless — the DNS and domain intelligence you need for **IT, email deliverability, security and domain portfolio management.**

---

### Why this Actor?

DNS holds the answers to a lot of important questions: does this domain resolve, where does its mail go, is SPF/DMARC set up, who is the registrar, and when does it expire? Checking one domain is easy; checking a whole portfolio or prospect list is not. This Actor does it in bulk on plain DNS + RDAP, so it's fast and inexpensive at scale.

- **Domain portfolio monitoring** — track expiry dates across all your domains and never miss a renewal.
- **Email deliverability audits** — check MX, SPF, DMARC and DKIM across a list of domains.
- **Security & recon** — map nameservers, mail providers and DNSSEC.
- **Lead enrichment** — add mail provider and registrar signals to a list of company domains.

---

### What you get

One record per domain:

| Field | Description |
| --- | --- |
| `domain` | The domain |
| `resolves` | Whether it resolves (has A/AAAA) |
| `aRecords` / `aaaaRecords` | IPv4 / IPv6 addresses |
| `mxRecords` | Mail servers (priority order) |
| `mailProvider` | Detected provider (Google Workspace, Microsoft 365…) |
| `nsRecords` | Nameservers |
| `hasSpf` / `hasDmarc` / `hasDkim` | Email-auth records present |
| `txtRecords` | TXT records |
| `registrar` | Domain registrar (via RDAP) |
| `createdDate` / `expiryDate` | Registration & expiry dates |
| `daysUntilExpiry` | Days until the domain expires |
| `dnssec` | Whether DNSSEC is enabled |
| `error` | Error, if the domain doesn't resolve |
| `scrapedAt` | Timestamp |

---

### Example output

```json
{
  "domain": "github.com",
  "resolves": "true",
  "aRecords": "140.82.121.4",
  "mxRecords": "github-com.mail.protection.outlook.com",
  "mailProvider": "Microsoft 365",
  "nsRecords": "dns1.p08.nsone.net, dns2.p08.nsone.net",
  "hasSpf": "true",
  "hasDmarc": "true",
  "registrar": "MarkMonitor Inc.",
  "createdDate": "2007-10-09",
  "expiryDate": "2026-10-09",
  "daysUntilExpiry": "92",
  "dnssec": "false",
  "scrapedAt": "2026-07-09T15:00:00.000Z"
}
````

***

### Input

| Field | Type | Default | Description |
| --- | --- | --- | --- |
| `domains` | array | — | **Required.** Domains to check. URLs and emails are accepted too (the domain is extracted). |
| `whoisLookup` | boolean | `true` | Look up registrar, expiry and DNSSEC via RDAP. Turn off for a faster, DNS-only run. |
| `maxConcurrency` | integer | `50` | Domains checked in parallel. |

#### DNS-only (fastest)

```json
{ "domains": ["example.com", "github.com"], "whoisLookup": false }
```

#### Full check with WHOIS

```json
{ "domains": ["example.com", "mysite.com"], "whoisLookup": true }
```

***

### Use cases in detail

#### 1. Domain expiry monitoring

Run your whole portfolio and sort by `daysUntilExpiry` to catch domains that need renewing — schedule it to get an ongoing watch.

#### 2. Email deliverability audit

Check `mxRecords`, `hasSpf`, `hasDmarc` and `mailProvider` across your domains (or a client's) to find gaps that hurt deliverability.

#### 3. Security & infrastructure recon

Map nameservers, DNSSEC and mail providers across a set of domains for an infrastructure overview.

#### 4. Lead enrichment

Add `mailProvider` and `registrar` to a list of company domains as B2B signals.

***

### How to use it

1. Click **Try for free**.
2. Paste your domains.
3. Click **Start**.
4. Export as **JSON, CSV, Excel**, or via the Apify API.

DNS is very fast; enabling WHOIS adds a lookup per domain, so DNS-only runs are quickest on huge lists.

***

### Calling from the API

```bash
curl -X POST "https://api.apify.com/v2/acts/YOUR_ACTOR_ID/runs?token=YOUR_APIFY_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{ "domains": ["github.com", "example.com"], "whoisLookup": true }'
```

Then fetch the dataset (JSON/CSV):

```bash
curl "https://api.apify.com/v2/acts/YOUR_ACTOR_ID/runs/last/dataset/items?token=YOUR_APIFY_TOKEN&format=csv"
```

***

### Frequently asked questions

**What records does it check?**
A, AAAA, MX, NS and TXT, plus SPF/DMARC/DKIM detection — and, with WHOIS on, registrar, creation/expiry dates and DNSSEC.

**Why is the registrar/expiry sometimes empty?**
Registrar data comes from RDAP, and not every TLD publishes RDAP yet (many newer TLDs don't). DNS fields are always populated when the domain resolves.

**Can I pass URLs or emails instead of bare domains?**
Yes — the domain is extracted automatically (e.g. `https://www.site.com/page` and `user@site.com` both become `site.com`).

**How many domains can it handle?**
Thousands to millions. DNS-only is fastest; WHOIS adds an RDAP request per domain.

**How is the mail provider detected?**
From the MX host (e.g. `*.protection.outlook.com` → Microsoft 365, `aspmx.l.google.com` → Google Workspace).

***

### Tips

- **Turn off `whoisLookup`** for the fastest possible run on huge lists (DNS-only).
- **Sort by `daysUntilExpiry`** for renewal monitoring.
- **Filter `hasSpf` / `hasDmarc` = false** to find email-auth gaps.

***

### Notes

This Actor performs public DNS and RDAP lookups on the domains you provide. It reads publicly available records only. Use on domains you have a legitimate reason to check.

***

### Support

Want CAA/SRV records, blacklist checks, or SSL certificate details? Open an issue from the Actor's page.

# Actor input Schema

## `domains` (type: `array`):

The domains to look up (e.g. example.com). Paste a list — handles thousands to millions. URLs and emails are accepted too (the domain is extracted).

## `whoisLookup` (type: `boolean`):

Look up registrar, creation/expiry dates and DNSSEC via RDAP. Adds a request per domain — turn off for a pure, faster DNS-only check.

## `maxConcurrency` (type: `integer`):

How many domains to check in parallel.

## `proxyConfiguration` (type: `object`):

Apify Proxy. Off by default — DNS/RDAP need no proxy.

## Actor input object example

```json
{
  "domains": [
    "github.com",
    "google.com",
    "cloudflare.com"
  ],
  "whoisLookup": true,
  "maxConcurrency": 50,
  "proxyConfiguration": {
    "useApifyProxy": false
  }
}
```

# Actor output Schema

## `domain` (type: `string`):

The domain

## `resolves` (type: `string`):

Whether it resolves (has A/AAAA)

## `aRecords` (type: `string`):

IPv4 addresses

## `aaaaRecords` (type: `string`):

IPv6 addresses

## `mxRecords` (type: `string`):

Mail servers

## `mailProvider` (type: `string`):

Detected mail provider

## `nsRecords` (type: `string`):

Nameservers

## `hasSpf` (type: `string`):

Has SPF record

## `hasDmarc` (type: `string`):

Has DMARC record

## `hasDkim` (type: `string`):

Has DKIM-related TXT

## `txtRecords` (type: `string`):

TXT records

## `registrar` (type: `string`):

Domain registrar

## `createdDate` (type: `string`):

Registration date

## `expiryDate` (type: `string`):

Expiry date

## `daysUntilExpiry` (type: `string`):

Days until expiry

## `dnssec` (type: `string`):

DNSSEC enabled

## `error` (type: `string`):

Error if failed

## `scrapedAt` (type: `string`):

Timestamp

# API

You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup.

## JavaScript example

```javascript
import { ApifyClient } from 'apify-client';

// Initialize the ApifyClient with your Apify API token
// Replace the '<YOUR_API_TOKEN>' with your token
const client = new ApifyClient({
    token: '<YOUR_API_TOKEN>',
});

// Prepare Actor input
const input = {
    "domains": [
        "github.com",
        "google.com",
        "cloudflare.com"
    ],
    "maxConcurrency": 50
};

// Run the Actor and wait for it to finish
const run = await client.actor("haketa/bulk-dns-checker").call(input);

// Fetch and print Actor results from the run's dataset (if any)
console.log('Results from dataset');
console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
const { items } = await client.dataset(run.defaultDatasetId).listItems();
items.forEach((item) => {
    console.dir(item);
});

// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs

```

## Python example

```python
from apify_client import ApifyClient

# Initialize the ApifyClient with your Apify API token
# Replace '<YOUR_API_TOKEN>' with your token.
client = ApifyClient("<YOUR_API_TOKEN>")

# Prepare the Actor input
run_input = {
    "domains": [
        "github.com",
        "google.com",
        "cloudflare.com",
    ],
    "maxConcurrency": 50,
}

# Run the Actor and wait for it to finish
run = client.actor("haketa/bulk-dns-checker").call(run_input=run_input)

# Fetch and print Actor results from the run's dataset (if there are any)
print("💾 Check your data here: https://console.apify.com/storage/datasets/" + run["defaultDatasetId"])
for item in client.dataset(run["defaultDatasetId"]).iterate_items():
    print(item)

# 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start

```

## CLI example

```bash
echo '{
  "domains": [
    "github.com",
    "google.com",
    "cloudflare.com"
  ],
  "maxConcurrency": 50
}' |
apify call haketa/bulk-dns-checker --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "command": "npx",
            "args": [
                "mcp-remote",
                "https://mcp.apify.com/?tools=haketa/bulk-dns-checker",
                "--header",
                "Authorization: Bearer <YOUR_API_TOKEN>"
            ]
        }
    }
}

```

## OpenAPI specification

```json
{
    "openapi": "3.0.1",
    "info": {
        "title": "Bulk DNS & Domain Checker — Records, WHOIS & Expiry",
        "description": "Check thousands of domains at once: A/AAAA/MX/TXT/NS records, SPF/DMARC/DKIM, mail provider, registrar, creation & expiry dates, nameservers and DNSSEC. Fast, cheap, keyless DNS & domain lookup for IT, security and domain portfolios.",
        "version": "0.1",
        "x-build-id": "sNXHMzDs7JJ7lcEbQ"
    },
    "servers": [
        {
            "url": "https://api.apify.com/v2"
        }
    ],
    "paths": {
        "/acts/haketa~bulk-dns-checker/run-sync-get-dataset-items": {
            "post": {
                "operationId": "run-sync-get-dataset-items-haketa-bulk-dns-checker",
                "x-openai-isConsequential": false,
                "summary": "Executes an Actor, waits for its completion, and returns Actor's dataset items in response.",
                "tags": [
                    "Run Actor"
                ],
                "requestBody": {
                    "required": true,
                    "content": {
                        "application/json": {
                            "schema": {
                                "$ref": "#/components/schemas/inputSchema"
                            }
                        }
                    }
                },
                "parameters": [
                    {
                        "name": "token",
                        "in": "query",
                        "required": true,
                        "schema": {
                            "type": "string"
                        },
                        "description": "Enter your Apify token here"
                    }
                ],
                "responses": {
                    "200": {
                        "description": "OK"
                    }
                }
            }
        },
        "/acts/haketa~bulk-dns-checker/runs": {
            "post": {
                "operationId": "runs-sync-haketa-bulk-dns-checker",
                "x-openai-isConsequential": false,
                "summary": "Executes an Actor and returns information about the initiated run in response.",
                "tags": [
                    "Run Actor"
                ],
                "requestBody": {
                    "required": true,
                    "content": {
                        "application/json": {
                            "schema": {
                                "$ref": "#/components/schemas/inputSchema"
                            }
                        }
                    }
                },
                "parameters": [
                    {
                        "name": "token",
                        "in": "query",
                        "required": true,
                        "schema": {
                            "type": "string"
                        },
                        "description": "Enter your Apify token here"
                    }
                ],
                "responses": {
                    "200": {
                        "description": "OK",
                        "content": {
                            "application/json": {
                                "schema": {
                                    "$ref": "#/components/schemas/runsResponseSchema"
                                }
                            }
                        }
                    }
                }
            }
        },
        "/acts/haketa~bulk-dns-checker/run-sync": {
            "post": {
                "operationId": "run-sync-haketa-bulk-dns-checker",
                "x-openai-isConsequential": false,
                "summary": "Executes an Actor, waits for completion, and returns the OUTPUT from Key-value store in response.",
                "tags": [
                    "Run Actor"
                ],
                "requestBody": {
                    "required": true,
                    "content": {
                        "application/json": {
                            "schema": {
                                "$ref": "#/components/schemas/inputSchema"
                            }
                        }
                    }
                },
                "parameters": [
                    {
                        "name": "token",
                        "in": "query",
                        "required": true,
                        "schema": {
                            "type": "string"
                        },
                        "description": "Enter your Apify token here"
                    }
                ],
                "responses": {
                    "200": {
                        "description": "OK"
                    }
                }
            }
        }
    },
    "components": {
        "schemas": {
            "inputSchema": {
                "type": "object",
                "required": [
                    "domains"
                ],
                "properties": {
                    "domains": {
                        "title": "Domains to check",
                        "type": "array",
                        "description": "The domains to look up (e.g. example.com). Paste a list — handles thousands to millions. URLs and emails are accepted too (the domain is extracted).",
                        "items": {
                            "type": "string"
                        }
                    },
                    "whoisLookup": {
                        "title": "Include WHOIS (registrar & expiry)",
                        "type": "boolean",
                        "description": "Look up registrar, creation/expiry dates and DNSSEC via RDAP. Adds a request per domain — turn off for a pure, faster DNS-only check.",
                        "default": true
                    },
                    "maxConcurrency": {
                        "title": "Max concurrency",
                        "minimum": 1,
                        "maximum": 200,
                        "type": "integer",
                        "description": "How many domains to check in parallel.",
                        "default": 50
                    },
                    "proxyConfiguration": {
                        "title": "Proxy configuration",
                        "type": "object",
                        "description": "Apify Proxy. Off by default — DNS/RDAP need no proxy.",
                        "default": {
                            "useApifyProxy": false
                        }
                    }
                }
            },
            "runsResponseSchema": {
                "type": "object",
                "properties": {
                    "data": {
                        "type": "object",
                        "properties": {
                            "id": {
                                "type": "string"
                            },
                            "actId": {
                                "type": "string"
                            },
                            "userId": {
                                "type": "string"
                            },
                            "startedAt": {
                                "type": "string",
                                "format": "date-time",
                                "example": "2025-01-08T00:00:00.000Z"
                            },
                            "finishedAt": {
                                "type": "string",
                                "format": "date-time",
                                "example": "2025-01-08T00:00:00.000Z"
                            },
                            "status": {
                                "type": "string",
                                "example": "READY"
                            },
                            "meta": {
                                "type": "object",
                                "properties": {
                                    "origin": {
                                        "type": "string",
                                        "example": "API"
                                    },
                                    "userAgent": {
                                        "type": "string"
                                    }
                                }
                            },
                            "stats": {
                                "type": "object",
                                "properties": {
                                    "inputBodyLen": {
                                        "type": "integer",
                                        "example": 2000
                                    },
                                    "rebootCount": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "restartCount": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "resurrectCount": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "computeUnits": {
                                        "type": "integer",
                                        "example": 0
                                    }
                                }
                            },
                            "options": {
                                "type": "object",
                                "properties": {
                                    "build": {
                                        "type": "string",
                                        "example": "latest"
                                    },
                                    "timeoutSecs": {
                                        "type": "integer",
                                        "example": 300
                                    },
                                    "memoryMbytes": {
                                        "type": "integer",
                                        "example": 1024
                                    },
                                    "diskMbytes": {
                                        "type": "integer",
                                        "example": 2048
                                    }
                                }
                            },
                            "buildId": {
                                "type": "string"
                            },
                            "defaultKeyValueStoreId": {
                                "type": "string"
                            },
                            "defaultDatasetId": {
                                "type": "string"
                            },
                            "defaultRequestQueueId": {
                                "type": "string"
                            },
                            "buildNumber": {
                                "type": "string",
                                "example": "1.0.0"
                            },
                            "containerUrl": {
                                "type": "string"
                            },
                            "usage": {
                                "type": "object",
                                "properties": {
                                    "ACTOR_COMPUTE_UNITS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATASET_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATASET_WRITES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "KEY_VALUE_STORE_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "KEY_VALUE_STORE_WRITES": {
                                        "type": "integer",
                                        "example": 1
                                    },
                                    "KEY_VALUE_STORE_LISTS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "REQUEST_QUEUE_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "REQUEST_QUEUE_WRITES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATA_TRANSFER_INTERNAL_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATA_TRANSFER_EXTERNAL_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "PROXY_RESIDENTIAL_TRANSFER_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "PROXY_SERPS": {
                                        "type": "integer",
                                        "example": 0
                                    }
                                }
                            },
                            "usageTotalUsd": {
                                "type": "number",
                                "example": 0.00005
                            },
                            "usageUsd": {
                                "type": "object",
                                "properties": {
                                    "ACTOR_COMPUTE_UNITS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATASET_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATASET_WRITES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "KEY_VALUE_STORE_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "KEY_VALUE_STORE_WRITES": {
                                        "type": "number",
                                        "example": 0.00005
                                    },
                                    "KEY_VALUE_STORE_LISTS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "REQUEST_QUEUE_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "REQUEST_QUEUE_WRITES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATA_TRANSFER_INTERNAL_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATA_TRANSFER_EXTERNAL_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "PROXY_RESIDENTIAL_TRANSFER_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "PROXY_SERPS": {
                                        "type": "integer",
                                        "example": 0
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}
```