Domain WHOIS & DNS Lookup – Bulk RDAP, Age, Expiry

Look up who registered a domain, when, until when, and how it's set up, for a whole list at once. Each domain comes back as one clean JSON row: registrar, creation date, expiry date, domain age, days until expiry, status codes, nameservers, DNSSEC, plus DNS records (A, AAAA, MX, NS, SPF, DMARC, TXT).

Registration data comes from the official RDAP service of each registry (the modern, structured replacement for WHOIS). For popular TLDs without RDAP, like .io, .co, .so and .de, it falls back to the registry's classic WHOIS server automatically.

Price: $1 per 1,000 domains ($0.001 each). Invalid inputs, duplicates and failed lookups are free.

Screenshots are rendered from a real run on 2026-10-01 (run input, SUMMARY record and dataset), not mock-ups.

Why use this lookup

💵 Price	$1 per 1,000 domains, no monthly rental (plus Apify's tiny per-run start fee)
🛡️ Pay only for answers	Invalid inputs, duplicates, unsupported TLDs and failed lookups cost $0
🏛️ Official sources	RDAP from the registry (IANA bootstrap), WHOIS fallback for .io, .co, .so, .de, .me, .tv and more
📆 Ready-made numbers	ageDays and daysUntilExpiry computed for you, ISO 8601 dates
📬 DNS & email setup included	A/AAAA, MX, NS, SPF, DMARC and TXT records at no extra charge
🔎 Availability hint	Unregistered domains come back with registered: false / likelyAvailable: true
🧹 Accepts messy input	URLs, subdomains and mixed case are reduced to the registrable domain (https://www.bbc.co.uk/news → bbc.co.uk)
🤖 AI-agent ready	Callable from Claude, ChatGPT & Cursor through Apify's MCP server

What you can use it for

• 🛡️ Security & brand protection – spot newly registered look-alike domains (low ageDays) and check their registrar and nameservers.
• 🧾 Portfolio management – find domains expiring in the next 30 days across all your registrars.
• 🎯 Lead qualification – domain age is a quick trust signal; MX tells you Google Workspace vs Microsoft 365.
• 📧 Email deliverability audits – which domains lack SPF or DMARC.
• 🔍 Domain research – check whether names on a shortlist are registered.

How to use

1. Click Try for free.
2. Paste domains or URLs into Domains.
3. Click Start and download the results from the Output tab as JSON, CSV or Excel.

Input example

{
  "domains": ["stripe.com", "https://www.bbc.co.uk/news", "github.io", "spiegel.de"],
  "includeDns": true
}

Field	Description
domains	Domains or URLs; reduced to the registrable domain, duplicates removed
includeDns	Add DNS records for registered domains (default true, no extra charge)
maxConcurrency	Domains looked up in parallel (default 5; registries rate-limit)
timeoutSecs	Per-lookup timeout, 5–60 seconds (default 15)

Output example

A real item from a run on 2026-10-01 (TXT records shortened):

{
  "input": "stripe.com",
  "domain": "stripe.com",
  "tld": "com",
  "registered": true,
  "likelyAvailable": false,
  "registrar": "SafeNames Ltd.",
  "registrarIanaId": "447",
  "registrarAbuseEmail": "abuse@safenames.net",
  "registrantOrganization": null,
  "registrantCountry": null,
  "createdAt": "1995-09-12T04:00:00Z",
  "updatedAt": "2025-10-01T01:39:51Z",
  "expiresAt": "2027-09-11T04:00:00Z",
  "ageDays": 11341,
  "daysUntilExpiry": 345,
  "statuses": [
    "client delete prohibited",
    "client transfer prohibited",
    "client update prohibited",
    "server delete prohibited",
    "server transfer prohibited",
    "server update prohibited"
  ],
  "nameservers": [
    "ns-1087.awsdns-07.org",
    "ns-1882.awsdns-43.co.uk",
    "ns-423.awsdns-52.com",
    "ns-705.awsdns-24.net"
  ],
  "dnssec": false,
  "source": "rdap",
  "sourceUrl": "https://rdap.verisign.com/com/v1/domain/stripe.com",
  "dns": {
    "a": [
      "198.202.176.111",
      "198.137.150.111"
    ],
    "aaaa": [],
    "mx": [
      "aspmx.l.google.com",
      "alt1.aspmx.l.google.com",
      "alt2.aspmx.l.google.com",
      "aspmx2.googlemail.com",
      "aspmx3.googlemail.com"
    ],
    "ns": [
      "ns-1087.awsdns-07.org",
      "ns-1882.awsdns-43.co.uk",
      "ns-423.awsdns-52.com",
      "ns-705.awsdns-24.net"
    ],
    "spf": "v=spf1 ip4:198.2.180.60/32 ip4:13.111.2.227/32 include:spf1.stripe.com include:greenhouse-outbound-mail.stripe.com include:_spf.qualtrics.com ~all",
    "dmarc": "v=DMARC1; p=reject; pct=100; fo=1; rua=mailto:dmarc-reports@stripe.com; ruf=mailto:dmarc-forensics@stripe.com;",
    "txt": [
      "whimsical=253112f9add9790f3a27b9d9893626451fc4cda1",
      "z4mthhzk10l6qc0rg4211mnnppkh2y5b"
    ]
  },
  "checkedAt": "2026-10-01T02:04:19.752Z"
}

Also saved: a SUMMARY record in the run's key-value store with the status of every input (ok, duplicate, invalid or error with the reason).

Test results

Real runs on 2026-10-01: 9 inputs (8 domains + 1 duplicate) across .com, .co.uk, .io, .co, .de, .dev, .so → 8 rows, 8 charged, about 4 seconds. Three invalid inputs → 0 rows, $0. A run with a $0.0025 maximum cost stopped at exactly 2 domains.

Limits you should know about

• Registrant names and emails are usually redacted (GDPR and registrar privacy). registrantOrganization is filled only when the registry publishes it.
• Some registries publish very little. .de (DENIC) gives nameservers, status and last-changed date but no creation or expiry date; a few ccTLDs have neither RDAP nor public WHOIS and are reported as errors, for free.
• likelyAvailable means the registry has no record. Premium, reserved or blocked names can still be unavailable to register.
• Registrable-domain detection uses a built-in list of common second-level suffixes (co.uk, com.au, co.jp…); rare ones may need the exact domain.
• Registries rate-limit heavy use; very large lists run more reliably with modest concurrency.

Pricing

Pay-per-event: $0.001 per domain looked up (= $1 per 1,000), registered or not. Invalid inputs, duplicates and failed lookups are free, and runs respect your maximum cost per run exactly. Apify's free plan includes monthly credits, so you can try it at no cost.

Quick start in Python

from apify_client import ApifyClient

client = ApifyClient("YOUR_APIFY_TOKEN")
run = client.actor("siftwright/domain-whois-dns-lookup").call(run_input={
    "domains": ["stripe.com", "github.io", "bbc.co.uk"],
})
# apify-client 3.x (pip install apify-client); on 2.x use run["defaultDatasetId"]
for d in client.dataset(run.default_dataset_id).iterate_items():
    print(d["domain"], d["registrar"], d["createdAt"], d["daysUntilExpiry"])

Use it via API

curl -X POST "https://api.apify.com/v2/acts/siftwright~domain-whois-dns-lookup/run-sync-get-dataset-items?token=YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"domains":["stripe.com","github.io"],"includeDns":false}'

Works with Python and JavaScript API clients, Make, Zapier, n8n, LangChain and LlamaIndex. AI agents (Claude, ChatGPT, Cursor) can call it through Apify's MCP server: https://mcp.apify.com?tools=siftwright/domain-whois-dns-lookup.

FAQ

What is RDAP? The Registration Data Access Protocol: the official, JSON-based successor to WHOIS that ICANN requires for gTLDs. It returns structured data, so dates and registrars are reliable instead of scraped from free text.

Why is the registrant name empty? Since GDPR, most registries and registrars redact personal data. We return what the registry publishes and never guess.

Am I charged for domains that are not registered? Yes, that is a valid answer ($0.001). Invalid inputs, duplicates and lookups that fail are free.

Is it legal? It queries the public registration services that registries operate for exactly this purpose. Use the data in line with applicable law and the registries' terms.

Something broke or you need a TLD added? Open an issue on the Issues tab or email support@siftwright.com.