Blacklists Compared

7 September 2002

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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 xbl.selwerd.cx zone because it is too aggressive to be widely useful, and excludes the blocktest.relays.osirusoft.com zone because it is not a blacklist.

HitsDNS Zone
7662(total number of IP addresses tested, including 373 at SDSC)
4542(union of most IP zones)
3312xbl.selwerd.cx
2215blackholes.five-ten-sg.com (union of all results)
1407bl.spamcop.net
1260no-more-funn.moensted.dk (union of all results)
1172relays.osirusoft.com (union of all results)
1083block.blars.org
902blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
850spam.dnsrbl.net
834dnsbl.njabl.org (union of all results)
804dnsbl.njabl.org (result 127.0.0.2 = source or relay)
795blackholes.wirehub.net
753cn-kr.blackholes.us (union of all results)
751no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
727cw.blackholes.us
716unconfirmed.dsbl.org
643ztl.dorkslayers.com
547blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
523ipwhois.rfc-ignorant.org
509cn-kr.blackholes.us (result 127.0.0.3 = Korea)
509korea.blackholes.us
507korea.services.net
506relays.osirusoft.com (result 127.0.0.4 = spam source)
496blackholes.intersil.net
481t1.bl.reynolds.net.au
444ybl.megacity.org
443list.dsbl.org
430inputs.relays.osirusoft.com
428relays.osirusoft.com (result 127.0.0.2 = relay)
364assholes.madscience.nl
358relays.visi.com
356relays.bl.kundenserver.de
348spews.relays.osirusoft.com
337blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
322relays.ordb.org
307proxies.relays.monkeys.com
289blackholes.five-ten-sg.com (result 127.0.0.3 = dialup)
286mail-abuse.blacklist.jippg.org
247no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
244cn-kr.blackholes.us (result 127.0.0.2 = China)
244china.blackholes.us
242multihop.dsbl.org
234flowgoaway.com
229spamsources.relays.osirusoft.com (union of all results)
209no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
207spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
202relays.osirusoft.com (result 127.0.0.9 = open proxy)
201socks.relays.osirusoft.com
196spam.wytnij.to
193dev.null.dk
182blacklist.spambag.org
158orbs.dorkslayers.com
157spamsources.fabel.dk
150verio.blackholes.us
136relays.osirusoft.com (result 127.0.0.6 = spamsites)
133sbl.spamhaus.org
132spamhaus.relays.osirusoft.com
1293y.spam.mrs.kithrup.com
126work.drbl.croco.net
115blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
98opm.blitzed.org
95level3.blackholes.us
94xo.blackholes.us
89dun.dnsrbl.net
86brazil.blackholes.us
78rackspace.blackholes.us
77spamguard.leadmon.net (union of all results)
75http.opm.blitzed.org
72taiwan.blackholes.us
60formmail.relays.monkeys.com
60dnsbl.delink.net
60blackhole.compu.net
58spamguard.leadmon.net (result 127.0.0.2 = dialup)
51blocktest.relays.osirusoft.com (not a blacklist!)
39japan.blackholes.us
39dialups.relays.osirusoft.com (union of all results)
38relays.dorkslayers.com
34inflow.blackholes.us
34argentina.blackholes.us
34no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
33dynablock.wirehub.net (result 127.0.0.2 = dialup)
33dynablock.wirehub.net (union of all results)
31socks.opm.blitzed.org
31dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
30dnsbl.njabl.org (result 127.0.0.3 = dialup)
27relays.osirusoft.com (result 127.0.0.3 = dialup)
25ciberlynx.blackholes.us
23spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
18wanadoo-fr.blackholes.us
18broadwing.blackholes.us
17spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
16eli.blackholes.us
15blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
13nigeria.blackholes.us
12thailand.blackholes.us
10epoch.blackholes.us
10no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
8dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
8blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
7proxies.relays.osirusoft.com
5no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
4no-more-funn.moensted.dk (result 127.0.0.9 = misc)
3spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
2wingate.opm.blitzed.org
2relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2blackholes.five-ten-sg.com (result 127.0.0.6 = relay)
1valueweb.blackholes.us
1dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
1pm0-no-more.compu.net
1dialup.blacklist.jippg.org (union of all results)

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. The blackhole.compu.net zone "is primarily for hosts which were not blocked by other blackhole sites and spammed compu.net" and the pm0-no-more.compu.net zone "blocks all pm0 email."

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

HitsDNS Zone
7662(total number of IP addresses whose names were tested, including 373 at SDSC)
1365(union of all domain zones)
1085abuse.rfc-ignorant.org
421whois.rfc-ignorant.org (union of all results)
280whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
141whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
7postmaster.rfc-ignorant.org
7dsn.rfc-ignorant.org (zone not intended for this use)
4client-domain.sjesl.monkeys.com
3sender-domain.sjesl.monkeys.com (zone not intended for this use)
1helo-domain.sjesl.monkeys.com (zone not intended for this use)

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

HitsDNS Zone
5176(total number of domains tested, including 181 at SDSC)
830(union of all domain zones)
344abuse.rfc-ignorant.org
301whois.rfc-ignorant.org (union of all results)
181whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
163postmaster.rfc-ignorant.org
138sender-domain.sjesl.monkeys.com
120whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
97dsn.rfc-ignorant.org
83helo-domain.sjesl.monkeys.com (zone not intended for this use)
61client-domain.sjesl.monkeys.com (zone not intended for this use)
31ex.dnsbl.org (union of all results)
22ex.dnsbl.org (result 127.0.0.2 = spamsites)
9ex.dnsbl.org (result 127.0.0.3 = spam source)
5bandwidth-pigs.monkeys.com
4in.dnsbl.org (result 127.0.0.2 = spam source)
4in.dnsbl.org (union of all results)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 9 September 2002.