Blacklist & Spam Reputation Checker — DNSBL / RBL Lookup

Check any IP address or domain against 16 active blacklists in one run. Get a reputation score, risk level, and a full per-list breakdown — no API key, no signup, no scraping.

Used by email marketers checking sender reputation, security teams auditing infrastructure, and developers enriching domain or IP data in their pipelines.

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What it checks

The Actor queries a curated set of 16 DNS-based blacklists (DNSBLs) that are:

• Free for commercial use with no cloud IP restrictions
• Currently active and maintained
• Not known for excessive false positives

Lists are automatically split by target type — IP lists for IP inputs, domain lists for domain inputs.

IP Blacklists (9 lists)

List	Tier	About
b.barracudacentral.org	Critical	Barracuda Networks — used by major enterprise mail filters
bl.spamcop.net	Critical	SpamCop — aggregates spam reports from users worldwide
spam.abuse.ch	High	abuse.ch — tracks active spam infrastructure
drone.abuse.ch	High	abuse.ch — tracks botnet and drone IPs
bl.0spam.org	Medium	0spam — free community-maintained blocklist
rbl.0spam.org	Medium	0spam — secondary RBL zone
ips.backscatterer.org	Medium	WPBL — backscatter spam sources
psbl.surriel.com	Medium	PSBL — passive spam block list
dnsbl.spfbl.net	Medium	SPFBL — reputation-based blocklist

Domain Blacklists (7 lists)

List	Tier	About
multi.surbl.org	Critical	SURBL — domains found in spam message bodies
black.uribl.com	Critical	URIBL — URI-based domain blacklist
dbl.nordspam.com	High	NordSpam — free for all commercial use, no restrictions
uribl.spameatingmonkey.net	High	SpamEatingMonkey — URI domain blocklist
fresh.spameatingmonkey.net	Medium	SpamEatingMonkey — recently listed domains
rbl.0spam.org	Medium	0spam domain zone
dnsbl.spfbl.net	Medium	SPFBL domain reputation

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Scoring

Score	Label	Meaning
100	Clean	Not listed on any blacklist
85–99	Low Risk	Listed on one or more medium-tier lists only
70–84	Medium Risk	Listed on high-tier list(s)
1–69	High Risk	Listed on multiple high-tier lists
0	Critical	Listed on one or more critical-tier lists

Each critical listing deducts 30 points, high deducts 15, medium deducts 5.

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Input

Provide either a single target, a targets list for bulk checks, or both:

Field	Type	Required	Description
target	string	No*	A single IPv4 address (e.g. 8.8.8.8) or domain name (e.g. example.com)
targets	array of strings	No*	List of IPv4 addresses and/or domain names to check in a single batch run

* At least one valid IPv4 address or domain in target or targets is required. Duplicates are automatically removed, and URLs are normalized to hostnames.

The Actor auto-detects whether each input is an IP or domain and queries the appropriate lists automatically.

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Example output — clean IP

{
  "target": "8.8.8.8",
  "targetType": "ip",
  "checkedAt": "2026-04-25T21:00:31.131Z",
  "totalChecked": 9,
  "totalListed": 0,
  "totalClean": 9,
  "reputationScore": 100,
  "reputationLabel": "Clean",
  "riskLevel": "none",
  "criticalListings": 0,
  "results": [
    { "list": "b.barracudacentral.org", "tier": "critical", "listed": false },
    { "list": "bl.spamcop.net", "tier": "critical", "listed": false }
  ]
}

Example output — listed IP

{
  "target": "1.2.3.4",
  "targetType": "ip",
  "totalChecked": 9,
  "totalListed": 1,
  "reputationScore": 95,
  "reputationLabel": "Medium Risk",
  "riskLevel": "medium",
  "criticalListings": 0,
  "results": [
    { "list": "dnsbl.spfbl.net", "tier": "medium", "listed": true, "responseCode": "127.0.0.4" }
  ]
}

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Use cases

Email deliverability Before sending a campaign, check your sending IP and domain against all major blacklists. A single critical listing can cause Gmail, Outlook, and Yahoo to reject your mail entirely.

Security & infrastructure auditing Check every IP in your server fleet or every domain in your vendor list. Integrate into your CI/CD pipeline or scheduled monitoring workflow via the Apify API.

Lead enrichment & CRM hygiene Before reaching out to a prospect domain, verify it isn't blacklisted. Emailing a domain that's on SURBL or URIBL signals to receiving servers that your list hygiene is poor.

Threat intelligence Check suspicious IPs or domains encountered in logs, headers, or incident reports against active threat-tracking lists like abuse.ch.

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Integrate via API

Single target:

curl -X POST \
  "https://api.apify.com/v2/acts/obicodes~blacklist-reputation/run-sync-get-dataset-items?token=YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"target": "8.8.8.8"}'

Bulk lookup (multiple IPs/domains in one run):

curl -X POST \
  "https://api.apify.com/v2/acts/obicodes~blacklist-reputation/run-sync-get-dataset-items?token=YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"targets": ["8.8.8.8", "google.com", "openai.com"]}'

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Pricing

• $0.05 Actor start fee (once per run)
• $0.01 per result

A complete blacklist check costs $0.06 total.