DNSBL
DNSBL Blacklist Directory
DNS-based blacklists (DNSBL), also called RBLs, are used by mail servers to reject connections from known spam sources. This directory covers all the blacklists we track β active and discontinued β organized by operator.
abuse.ch6 lists
SORBS4 lists
0spam Project3 lists
AUPADS3 lists
SpamRATS3 lists
UCEPROTECT Network3 lists
GWEEP2 lists
IMP2 lists
Spam Eating Monkey2 lists
Spamhaus Project2 lists
Abusix1 lists
Anonmails1 lists
Backscatterer.org1 lists
Barracuda Networks1 lists
Blocklist.de1 lists
Cisco Talos1 lists
Daniel Austin1 lists
Digibase1 lists
DRMX1 lists
DroneBL Project1 lists
Fabel1 lists
GBUdb / Message Sniffer1 lists
Hostkarma1 lists
InterServer1 lists
JIPPG1 lists
Kempt1 lists
Konstant1 lists
Korea Services1 lists
Lashback1 lists
LNSG1 lists
Mailspike1 lists
manitu1 lists
MSRBL1 lists
Nether1 lists
Nordspam1 lists
NoSolicitado1 lists
RBL.JP1 lists
S5H1 lists
Schulte1 lists
SPFBL1 lists
Suomispam1 lists
Surriel1 lists
Team Cymru1 lists
TRIUMF1 lists
TTK1 lists
Unsubscore1 lists
Woody's1 lists
WPBL1 lists
ZapBL1 lists
FAQ
What is a DNSBL?
A DNSBL (DNS-based Blackhole List) is a list of IP addresses or domains published via DNS. Mail servers query these lists in real time during SMTP connections to decide whether to accept, flag, or reject incoming mail. Spamhaus ZEN and Barracuda are among the most widely used.
How do I check if my IP is blacklisted?
Enter your IP address or domain in the search box at the bottom of this page. Our blacklist checker queries all active DNSBLs simultaneously and shows which lists have a record for your address, along with links to each operator's removal process.
What is the difference between IP and domain blacklists?
IP blacklists (like Spamhaus ZEN) list the sending server's IP address. Domain blacklists (like Spamhaus DBL) list the domain found in message URLs or headers. A mail server can check both: the connecting IP against IP lists, and domains in the message body against domain lists.
What does "discontinued" mean?
A discontinued DNSBL no longer updates its data or responds to DNS queries. Listings in these lists have no effect on mail delivery. We keep them in the directory for reference, since they may still appear in older documentation or server configurations.
Check Your IP or Domain
Enter an IP address or domain to check all active blacklists at once.