Blacklists Compared

5 October 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
8637(total number of IP addresses tested, including 437 at SDSC)
5135(union of most IP zones)
3563xbl.selwerd.cx
2442blackholes.five-ten-sg.com (union of all results)
1238block.blars.org
1219relays.osirusoft.com (union of all results)
1203no-more-funn.moensted.dk (union of all results)
1108bl.spamcop.net
1050blackholes.wirehub.net
1019ztl.dorkslayers.com
845blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
834cw.blackholes.us
806dnsbl.njabl.org (union of all results)
770unconfirmed.dsbl.org
763dnsbl.njabl.org (result 127.0.0.2 = source or relay)
720blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
689spam.dnsrbl.net
651cn-kr.blackholes.us (union of all results)
637no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
612relays.osirusoft.com (result 127.0.0.4 = spam source)
600blackholes.intersil.net
526blocktest.relays.osirusoft.com (not a blacklist!)
518ybl.megacity.org
475ipwhois.rfc-ignorant.org
472cn-kr.blackholes.us (result 127.0.0.3 = Korea)
472korea.blackholes.us
467korea.services.net
427proxies.relays.monkeys.com
417list.dsbl.org
415spews.relays.osirusoft.com
410t1.bl.reynolds.net.au
373blackholes.five-ten-sg.com (result 127.0.0.3 = dialup)
368mail-abuse.blacklist.jippg.org
361blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
344assholes.madscience.nl
341relays.osirusoft.com (result 127.0.0.2 = relay)
338inputs.relays.osirusoft.com
319multihop.dsbl.org
280spamsources.relays.osirusoft.com (union of all results)
272work.drbl.croco.net
258spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
248relays.bl.kundenserver.de
248no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
242no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
241relays.ordb.org
238relays.osirusoft.com (result 127.0.0.9 = open proxy)
237socks.relays.osirusoft.com
220relays.visi.com
219spam.wytnij.to
216blacklist.spambag.org
215flowgoaway.com
186opm.blitzed.org
180sbl.spamhaus.org
179cn-kr.blackholes.us (result 127.0.0.2 = China)
179china.blackholes.us
164verio.blackholes.us
1643y.spam.mrs.kithrup.com
135brazil.blackholes.us
135relays.osirusoft.com (result 127.0.0.6 = spamsites)
134spamhaus.relays.osirusoft.com
134dev.null.dk
133orbs.dorkslayers.com
124level3.blackholes.us
124http.opm.blitzed.org
124blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
109dnsbl.delink.net
106spamsources.fabel.dk
93blackhole.compu.net
90xo.blackholes.us
90spamguard.leadmon.net (union of all results)
89rackspace.blackholes.us
84taiwan.blackholes.us
81dun.dnsrbl.net
74socks.opm.blitzed.org
74spamguard.leadmon.net (result 127.0.0.2 = dialup)
66ciberlynx.blackholes.us
60internap.blackholes.us
58rr.blackholes.us
57no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
52formmail.relays.monkeys.com
49argentina.blackholes.us
46japan.blackholes.us
43dnsbl.njabl.org (result 127.0.0.3 = dialup)
34inflow.blackholes.us
32singapore.blackholes.us
32broadwing.blackholes.us
31dialups.relays.osirusoft.com (union of all results)
29dynablock.wirehub.net (result 127.0.0.2 = dialup)
29russia.blackholes.us
29eli.blackholes.us
29dynablock.wirehub.net (union of all results)
26dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
26relays.dorkslayers.com
24relays.osirusoft.com (result 127.0.0.3 = dialup)
21spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
18nigeria.blackholes.us
17blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
16proxies.relays.osirusoft.com
14spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
11epoch.blackholes.us
10he.blackholes.us
10no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
8wanadoo-fr.blackholes.us
7thailand.blackholes.us
7no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
5dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
3skynetweb.blackholes.us
3wingate.opm.blitzed.org
2spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2no-more-funn.moensted.dk (result 127.0.0.9 = misc)
2blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1valueweb.blackholes.us
1spamsites.relays.osirusoft.com (result 127.0.0.6)
1relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
1dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
1spamsites.relays.osirusoft.com (union of all results)
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."


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

HitsDNS Zone
8637(total number of IP addresses whose names were tested, including 437 at SDSC)
1671(union of all domain zones)
1295abuse.rfc-ignorant.org
524whois.rfc-ignorant.org (union of all results)
290whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
234whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
10postmaster.rfc-ignorant.org
8dsn.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
5963(total number of domains tested, including 236 at SDSC)
1069(union of all domain zones)
445whois.rfc-ignorant.org (union of all results)
418abuse.rfc-ignorant.org
304whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
210postmaster.rfc-ignorant.org
170sender-domain.sjesl.monkeys.com
141whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
114dsn.rfc-ignorant.org
112helo-domain.sjesl.monkeys.com (zone not intended for this use)
80client-domain.sjesl.monkeys.com (zone not intended for this use)
30ex.dnsbl.org (union of all results)
20ex.dnsbl.org (result 127.0.0.2 = spamsites)
10bandwidth-pigs.monkeys.com
10ex.dnsbl.org (result 127.0.0.3 = spam source)
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 7 October 2002.