Blacklists Compared

1 July 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
87762(total number of IP addresses tested, including 509 at SDSC)
79650(union of most IP zones)
55975block.blars.org
48189dnsbl.sorbs.net (union of all results)
41042dnsbl.tqmcube.com (union of all results)
39899t1.dnsbl.net.au
36870dnsbl.sorbs.net (result 127.0.0.10 = dialup)
35460blackholes.five-ten-sg.com (union of all results)
34393blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
32337sbl-xbl.spamhaus.org (union of all results)
31469xbl.spamhaus.org (union of all results)
29503cbl.abuseat.org
29328xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
29311sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
27983psbl.surriel.com
27210dynablock.njabl.org
23306cn-kr.blackholes.us (result 127.0.0.2 = China)
23306cn-kr.blackholes.us (union of all results)
22323dnsbl.tqmcube.com (result 127.0.0.5 = China)
17370china.blackholes.us
15035no-more-funn.moensted.dk (union of all results)
14787sbl.csma.biz
11935dnsbl.tqmcube.com (result 127.0.0.2 = dialup)
11780unconfirmed.dsbl.org
11678list.dsbl.org
11673dsbl.dnsbl.net.au
11018dnsbl-2.uceprotect.net
10767dnsbl-1.uceprotect.net
10687bl.csma.biz
10486blacklist.spambag.org
10469bl.spamcop.net
8624combined-hib.dnsiplists.completewhois.com (union of all results)
8620combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
7447dnsbl.sorbs.net (result 127.0.0.6 = spam source)
7066dnsbl.tqmcube.com (result 127.0.0.3 = spam source)
6820dnsbl.njabl.org (union of all results)
6502no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
6487wpbl.dnsbl.net.au
6258dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
6111korea.services.net
5936korea.blackholes.us
5581dnsbl.njabl.org (result 127.0.0.9 = open proxy)
4715no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
4317l2.spews.dnsbl.sorbs.net
4314dnsbl.ahbl.org (union of all results)
4223sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
4222xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
3892dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
3689spamsources.fabel.dk
3669rmst.dnsbl.net.au
3527unsure.nether.net
3323no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
3132l1.spews.dnsbl.sorbs.net
3005brazil.blackholes.us
2989spews.dnsbl.net.au
2544dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
2207mail-abuse.blacklist.jippg.org
2148ricn.dnsbl.net.au
1743tr.countries.nerd.dk
1738turkey.blackholes.us
1718dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1597taiwan.blackholes.us
1559japan.blackholes.us
1341bl.spamcannibal.org
1274dnsbl-3.uceprotect.net
1035sbl.spamhaus.org
1031sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1000mexico.blackholes.us
930dnsbl.njabl.org (result 127.0.0.3 = dialup)
823argentina.blackholes.us
760probes.dnsbl.net.au
751russia.blackholes.us
682blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
583malaysia.blackholes.us
443hongkong.blackholes.us
416thailand.blackholes.us
378dnsbl.ahbl.org (result 127.0.0.4 = spam source)
366dnsbl.antispam.or.id
344spam.wytnij.to
305no-more-funn.moensted.dk (result 127.0.0.9 = misc)
282singapore.blackholes.us
247no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
222dnsbl.njabl.org (result 127.0.0.4 = spam source)
205blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
179ohps.dnsbl.net.au
162dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
156query.bondedsender.org (not a blacklist!)
149blackholes.intersil.net
143work.drbl.croco.net
113dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
106blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
97dnsbl.njabl.org (result 127.0.0.2 = open relay)
83flowgoaway.com
79multihop.dsbl.org
74relays.ordb.org
61blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
37dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
37spamguard.leadmon.net (union of all results)
29relays.nether.net
26spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
25blackholes.uceb.org (union of all results)
20osps.dnsbl.net.au
19rdts.dnsbl.net.au
17dnsbl.ahbl.org (result 127.0.0.15 = open relay)
16exemptions.ahbl.org (not a blacklist!)
15nigeria.blackholes.us
15dnsbl.sorbs.net (result 127.0.0.5 = open relay)
11tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
11tor.dnsbl.sectoor.de (union of all results)
10blackholes.uceb.org (result 127.0.0.2 = open relay)
9blackholes.uceb.org (result 127.0.0.3 = spam source)
9spamguard.leadmon.net (result 127.0.0.3 = spam source)
8dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
7blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
6owps.dnsbl.net.au
6osrs.dnsbl.net.au
6hil.habeas.com
6no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
5blackholes.uceb.org (result 127.0.0.5 = dialup)
4combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
3blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
3bl.deadbeef.com
3blackholes.brainerd.net
2spamguard.leadmon.net (result 127.0.0.8 = open proxy)
2blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)

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
87762(total number of IP addresses whose names were tested, including 509 at SDSC)
44545(union of all domain zones)
33861abuse.rfc-ignorant.org
31423rddn.dnsbl.net.au
22851dynamic.rhs.mailpolice.com
21821whois.rfc-ignorant.org (union of all results)
16391whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
5432whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2948webmail.rhs.mailpolice.com
647rhsbl.ahbl.org
506adv.rhs.mailpolice.com
414postmaster.rfc-ignorant.org
108dsn.rfc-ignorant.org (zone not intended for this use)
108bogusmx.rfc-ignorant.org
91bulk.rhs.mailpolice.com
2porn.rhs.mailpolice.com
1ex.dnsbl.org

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

HitsDNS Zone
50621(total number of domains tested, including 429 at SDSC)
10109(union of all domain zones)
4170whois.rfc-ignorant.org (union of all results)
3525whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3433abuse.rfc-ignorant.org
1691webmail.rhs.mailpolice.com
1317rhsbl.ahbl.org
1257postmaster.rfc-ignorant.org
920dsn.rfc-ignorant.org
722bogusmx.rfc-ignorant.org
645whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
280porn.rhs.mailpolice.com
194bulk.rhs.mailpolice.com
180adv.rhs.mailpolice.com
156blackhole.securitysage.com
49rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
49rhsbl.sorbs.net (union of all results)
36rddn.dnsbl.net.au (zone not intended for this use)
15dynamic.rhs.mailpolice.com
14ex.dnsbl.org
1cart00ney.surriel.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 17 July 2006.