Blacklists Compared

21 February 2004

[ 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
21878(total number of IP addresses tested, including 349 at SDSC)
17529(union of most IP zones)
13089t1.dnsbl.net.au
11025dnsbl.sorbs.net (union of all results)
10356block.blars.org
10047blackholes.five-ten-sg.com (union of all results)
9346sbl-xbl.spamhaus.org (union of all results)
9103blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
8937unconfirmed.dsbl.org
8738dsbl.dnsbl.net.au
8737list.dsbl.org
8336cbl.abuseat.org
8308xbl.spamhaus.org
8308sbl-xbl.spamhaus.org (result 127.0.0.4 = Spamhaus XBL)
7371dynablock.njabl.org
7243dnsbl.sorbs.net (result 127.0.0.10 = dialup)
6074dnsbl.njabl.org (union of all results)
4738no-more-funn.moensted.dk (union of all results)
4428sbl.csma.biz
4280bl.spamcop.net
4050dnsbl.njabl.org (result 127.0.0.9 = open proxy)
3335dnsbl.ahbl.org (union of all results)
3072cn-kr.blackholes.us (union of all results)
2893l2.spews.dnsbl.sorbs.net
2791dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2704dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
2590ipwhois.rfc-ignorant.org
2572l1.spews.dnsbl.sorbs.net
2571spews.dnsbl.net.au
2490psbl.surriel.com
2480spam.wytnij.to
2298unsure.nether.net
2288no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2173dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1945bl.csma.biz
1906no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1660cn-kr.blackholes.us (result 127.0.0.2 = China)
1660china.blackholes.us
1412cn-kr.blackholes.us (result 127.0.0.3 = Korea)
1412korea.blackholes.us
1393korea.services.net
1303dnsbl.njabl.org (result 127.0.0.3 = dialup)
1265sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1265sbl.spamhaus.org
1263rmst.dnsbl.net.au
1130wpbl.dnsbl.net.au
1094comcast.blackholes.us
978spamsources.fabel.dk
853opm.blitzed.org
824ricn.dnsbl.net.au
810relays.visi.com
747dnsbl.sorbs.net (result 127.0.0.6 = spam source)
703ybl.megacity.org
659spamguard.leadmon.net (union of all results)
650spamguard.leadmon.net (result 127.0.0.2 = dialup)
633blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
603probes.dnsbl.net.au
543dnsbl.ahbl.org (result 127.0.0.4 = spam source)
501pss.spambusters.org.ar
485cw.blackholes.us
482blacklist.spambag.org
454rr.blackholes.us
444brazil.blackholes.us
440work.drbl.croco.net
422dnsbl.njabl.org (result 127.0.0.4 = spam source)
398level3.blackholes.us
341blackholes.intersil.net
328charter.blackholes.us
325dnsbl.njabl.org (result 127.0.0.2 = source or relay)
296no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
286hil.habeas.com
280dnsbl.antispam.or.id
273taiwan.blackholes.us
252relays.ordb.org
227wanadoo-fr.blackholes.us
221blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
216japan.blackholes.us
213no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
191multihop.dsbl.org
187dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
187dialup.blacklist.jippg.org (union of all results)
181dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
173mexico.blackholes.us
166interbusiness.blackholes.us
157qwest.blackholes.us
1393y.spam.mrs.kithrup.com
126osrs.dnsbl.net.au
124infolink.blackholes.us
118dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
115internap.blackholes.us
114mail-abuse.blacklist.jippg.org
113verio.blackholes.us
113osps.dnsbl.net.au
112hongkong.blackholes.us
105dnsbl.sorbs.net (result 127.0.0.5 = open relay)
103turkey.blackholes.us
103tr.countries.nerd.dk
102argentina.blackholes.us
101ohps.dnsbl.net.au
85query.bondedsender.org (not a blacklist!)
81russia.blackholes.us
79no-more-funn.moensted.dk (result 127.0.0.9 = misc)
78dun.dnsrbl.net
77xo.blackholes.us
75relays.nether.net
75flowgoaway.com
73sbbl.they.com
71dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
61telstra.blackholes.us
60above.blackholes.us
59rogers.blackholes.us
50he.blackholes.us
48rdts.dnsbl.net.au
47blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
46singapore.blackholes.us
42bellsouth.blackholes.us
38a2000.blackholes.us
37malaysia.blackholes.us
36inflow.blackholes.us
35spam.exsilia.net (union of all results)
34covad.blackholes.us
34blackholes.brainerd.net
32blackholes.uceb.org (union of all results)
27cybercon.blackholes.us
27spam.exsilia.net (result 127.0.0.2 = spam source)
24rackspace.blackholes.us
24exemptions.ahbl.org (not a blacklist!)
23nigeria.blackholes.us
22ph.rbl.cluecentral.net
21blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
20swbell.blackholes.us
20blackholes.uceb.org (result 127.0.0.2 = open relay)
19yipes.blackholes.us
18spam.dnsrbl.net
17thailand.blackholes.us
16satos.rbl.cluecentral.net
14affinity.blackholes.us
14owps.dnsbl.net.au
14relays.bl.kundenserver.de
13broadwing.blackholes.us
13blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
12spamsources.yamta.org (result 127.0.0.2 = spam source)
11eli.blackholes.us
10blackholes.uceb.org (result 127.0.0.3 = spam source)
9maxim.blackholes.us
8no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
8spam.exsilia.net (result 127.0.0.3 = virus source)
8bl.deadbeef.com
7pajo.blackholes.us
7omrs.dnsbl.net.au
7spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
6olm.blackholes.us
6burst.blackholes.us
6blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
5navisite.blackholes.us
4epoch.blackholes.us
4no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
2blackholes.uceb.org (result 127.0.0.4 = spam source network)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
2dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)
1blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
1spamsites.dnsbl.net.au
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
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)

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
21878(total number of IP addresses whose names were tested, including 349 at SDSC)
10931(union of all domain zones)
7511abuse.rfc-ignorant.org
6733rddn.dnsbl.net.au
2946whois.rfc-ignorant.org (union of all results)
2104whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
874rhsbl.ahbl.org
842whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
652bulk.rhs.mailpolice.com
457blackhole.securitysage.com
196bl.deadbeef.com
46porn.rhs.mailpolice.com
19bogusmx.rfc-ignorant.org
17dsn.rfc-ignorant.org (zone not intended for this use)
15postmaster.rfc-ignorant.org

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

HitsDNS Zone
14134(total number of domains tested, including 210 at SDSC)
4905(union of all domain zones)
1813whois.rfc-ignorant.org (union of all results)
1548whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1402bulk.rhs.mailpolice.com
1301abuse.rfc-ignorant.org
738rhsbl.ahbl.org
686blackhole.securitysage.com
650postmaster.rfc-ignorant.org
601dsn.rfc-ignorant.org
265whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
161bogusmx.rfc-ignorant.org
92bl.deadbeef.com
76porn.rhs.mailpolice.com
24rddn.dnsbl.net.au (zone not intended for this use)
15rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
15rhsbl.sorbs.net (union of all results)
1rhsbl.sorbs.net (result 127.0.0.12 = domain does not send mail)
1cart00ney.surriel.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 5 March 2004.