Blacklists Compared

25 February 2006

[ Fighting Spam | Dialup Zones | Blacklists Compared | Current Blacklist Comparison | Sendmail Configuration ]


Survey results for all known public IP-based DNS blacklists. Lookups were done on connecting IP addresses. The "union of most IP zones" line excludes the exemptions.ahbl.org and query.bondedsender.org zones because they are not blacklists, and because it is too aggressive to be widely useful the block.blars.org zone is also excluded.

HitsDNS Zone
69562(total number of IP addresses tested, including 481 at SDSC)
62166(union of most IP zones)
43048block.blars.org
38268t1.dnsbl.net.au
38212dnsbl.sorbs.net (union of all results)
33261blackholes.five-ten-sg.com (union of all results)
32940sbl-xbl.spamhaus.org (union of all results)
32322blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
30789dnsbl.sorbs.net (result 127.0.0.10 = dialup)
30768xbl.spamhaus.org (union of all results)
29440sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
29437xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
29436cbl.abuseat.org
22885psbl.surriel.com
22312dynablock.njabl.org
16436no-more-funn.moensted.dk (union of all results)
13786cn-kr.blackholes.us (result 127.0.0.2 = China)
13786cn-kr.blackholes.us (union of all results)
13070sbl.csma.biz
11804unconfirmed.dsbl.org
11703list.dsbl.org
11688dsbl.dnsbl.net.au
10505blacklist.spambag.org
10415bl.spamcop.net
9229china.blackholes.us
7802no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
5886bl.csma.biz
5771combined-hib.dnsiplists.completewhois.com (union of all results)
5765combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
5487dnsbl.sorbs.net (result 127.0.0.6 = spam source)
5415l2.spews.dnsbl.sorbs.net
5303dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
5141unsure.nether.net
4842spews.dnsbl.net.au
4839l1.spews.dnsbl.sorbs.net
4570wpbl.dnsbl.net.au
4557korea.blackholes.us
4529korea.services.net
4279no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
4178dnsbl.njabl.org (union of all results)
3662rmst.dnsbl.net.au
3570no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
3235dnsbl.ahbl.org (union of all results)
2925dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2896ricn.dnsbl.net.au
2582sbl.spamhaus.org
2574sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
2543spamsources.fabel.dk
2354dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2264brazil.blackholes.us
1973xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1973sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1568russia.blackholes.us
1529xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1529sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1527opm.blitzed.org
1495spam.wytnij.to
1491japan.blackholes.us
1102mail-abuse.blacklist.jippg.org
1041dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
986probes.dnsbl.net.au
969bl.spamcannibal.org
920dnsbl.njabl.org (result 127.0.0.3 = dialup)
897dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
858dnsbl.ahbl.org (result 127.0.0.4 = spam source)
851tr.countries.nerd.dk
849turkey.blackholes.us
823taiwan.blackholes.us
790mexico.blackholes.us
751dnsbl.antispam.or.id
547argentina.blackholes.us
477no-more-funn.moensted.dk (result 127.0.0.9 = misc)
419hongkong.blackholes.us
419blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
363blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
359thailand.blackholes.us
344malaysia.blackholes.us
311no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
249dnsbl.njabl.org (result 127.0.0.2 = open relay)
235singapore.blackholes.us
183query.bondedsender.org (not a blacklist!)
182ohps.dnsbl.net.au
182relays.ordb.org
174blackholes.intersil.net
116blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
101dnsbl.njabl.org (result 127.0.0.4 = spam source)
80flowgoaway.com
75multihop.dsbl.org
56dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
52dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
43osps.dnsbl.net.au
33blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
23blackholes.uceb.org (union of all results)
21osrs.dnsbl.net.au
21relays.nether.net
18nigeria.blackholes.us
17rdts.dnsbl.net.au
15dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
14tor.dnsbl.sectoor.de (union of all results)
13tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
13exemptions.ahbl.org (not a blacklist!)
12dnsbl.sorbs.net (result 127.0.0.5 = open relay)
8blackholes.uceb.org (result 127.0.0.6 = spam haven)
8dnsbl.ahbl.org (result 127.0.0.15 = open relay)
8dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
7blackholes.uceb.org (result 127.0.0.3 = spam source)
7owps.dnsbl.net.au
7spamguard.leadmon.net (union of all results)
6blackholes.uceb.org (result 127.0.0.5 = dialup)
6combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
5hil.habeas.com
5blackholes.brainerd.net
4spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3blackholes.uceb.org (result 127.0.0.2 = open relay)
3spamguard.leadmon.net (result 127.0.0.3 = spam source)
3blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
2no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
2blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
2bl.deadbeef.com
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1spamsites.dnsbl.net.au
1no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)

The blackholes.intersil.net zone "lists entrenched spammers, mainsleaze and mainsleaze wannabes who have pestered users at Intersil." The flowgoaway.com zone lists FloNetwork systems.


Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses.

HitsDNS Zone
69562(total number of IP addresses whose names were tested, including 481 at SDSC)
38305(union of all domain zones)
26169abuse.rfc-ignorant.org
25383rddn.dnsbl.net.au
18742whois.rfc-ignorant.org (union of all results)
15107whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
10211dynamic.rhs.mailpolice.com
3635whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2152webmail.rhs.mailpolice.com
1089rhsbl.ahbl.org
515bl.deadbeef.com
480adv.rhs.mailpolice.com
312bulk.rhs.mailpolice.com
280postmaster.rfc-ignorant.org
133bogusmx.rfc-ignorant.org
126dsn.rfc-ignorant.org (zone not intended for this use)
3porn.rhs.mailpolice.com
2cart00ney.surriel.com
1blackhole.securitysage.com


Survey results for all known public domain-name-based DNS blacklists. Lookups were done on SMTP sender domains.

HitsDNS Zone
31990(total number of domains tested, including 392 at SDSC)
6755(union of all domain zones)
2183abuse.rfc-ignorant.org
2156whois.rfc-ignorant.org (union of all results)
1724whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1113postmaster.rfc-ignorant.org
1094rhsbl.ahbl.org
1033webmail.rhs.mailpolice.com
846bogusmx.rfc-ignorant.org
786dsn.rfc-ignorant.org
432whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
226bulk.rhs.mailpolice.com
183adv.rhs.mailpolice.com
137bl.deadbeef.com
129porn.rhs.mailpolice.com
124blackhole.securitysage.com
50rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
50rhsbl.sorbs.net (union of all results)
23rddn.dnsbl.net.au (zone not intended for this use)
14ex.dnsbl.org
9dynamic.rhs.mailpolice.com
1cart00ney.surriel.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 13 March 2006.