Check an IP address against RBL and DNSBL blacklists
Enter an address or check your own. We query each blacklist zone and show where the IP is listed.
| Blacklist | Status |
|---|---|
| bl.spamcop.net | Waiting |
| b.barracudacentral.org | Waiting |
| psbl.surriel.com | Waiting |
| dnsbl-1.uceprotect.net | Waiting |
| dnsbl-2.uceprotect.net | Waiting |
| bl.blocklist.de | Waiting |
| dnsbl.dronebl.org | Waiting |
| bl.mailspike.net | Waiting |
| all.s5h.net | Waiting |
| dnsbl.spfbl.net | Waiting |
| bl.0spam.org | Waiting |
| rbl.interserver.net | Waiting |
| spam.dnsbl.anonmails.de | Waiting |
Check a list of IPs
Paste up to 100 addresses. A proxy list in any format works: we take the IPv4 from each line. Your browser checks them against the same blacklists.
What RBL and DNSBL are
RBL and DNSBL are public lists of addresses that sent spam, scanned ports or took part in attacks. Mail servers, forums and anti-fraud systems check an incoming IP against these lists and block it or raise its risk score.
If a proxy sits on several lists, sites show it captchas more often or reject it. Check the address before you use it for mailing or account work.
A list answers with an address from 127.0.0.0/8. It works as a reply code, and the last digit names the reason: 127.0.0.2 almost everywhere means spam was seen, other codes differ from list to list. The check decodes SPFBL and DroneBL codes. SPFBL codes 3, 4 and 5 count as flags: SPFBL itself asks to use them for scoring only, without rejecting mail.
Your IP address and headers
See which address sites get, which country the request comes from and which headers give away a proxy.
Check my IPQuestions about blacklists
01What does it mean when an IP is blacklisted?
Mail servers that consult this list will reject or flag letters from the address. The list does not affect opening sites through that IP.
02How do I get an IP removed from a list?
Fix the cause first: close an open relay, remove malware, stop mailing people who did not opt in. Then request removal on the list site. Some lists drop the address on their own after a few days.
03Why is Spamhaus missing from the check?
Spamhaus does not answer the public DNS resolvers the in-browser check uses. Query it from your own DNS server, for example with the slpcheck script from the SLP page.
04What do the 127.0.0.x return codes mean?
The code tells why the address got listed: spam, an open proxy or an infected computer. The meaning appears next to each list that found the address.
05Can I check many addresses at once?
Yes, list mode takes up to 100 IPs at a time and exports the result to CSV. For a proxy pool with the country and network of each address use the list passport on the My IP page.