Blacklists Compared

28 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
8422(total number of IP addresses tested, including 415 at SDSC)
5054(union of most IP zones)
3472xbl.selwerd.cx
2386blackholes.five-ten-sg.com (union of all results)
1240no-more-funn.moensted.dk (union of all results)
1227block.blars.org
1173relays.osirusoft.com (union of all results)
1104bl.spamcop.net
986ztl.dorkslayers.com
890blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
885dnsbl.njabl.org (union of all results)
851dnsbl.njabl.org (result 127.0.0.2 = source or relay)
812blackholes.wirehub.net
768cw.blackholes.us
740unconfirmed.dsbl.org
722no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
716spam.dnsrbl.net
713cn-kr.blackholes.us (union of all results)
678blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
564blackholes.intersil.net
516ybl.megacity.org
509relays.osirusoft.com (result 127.0.0.4 = spam source)
494t1.bl.reynolds.net.au
484cn-kr.blackholes.us (result 127.0.0.3 = Korea)
484korea.blackholes.us
476korea.services.net
468ipwhois.rfc-ignorant.org
424list.dsbl.org
421relays.osirusoft.com (result 127.0.0.2 = relay)
419inputs.relays.osirusoft.com
410assholes.madscience.nl
409mail-abuse.blacklist.jippg.org
359blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
357relays.ordb.org
352blackholes.five-ten-sg.com (result 127.0.0.3 = dialup)
346spews.relays.osirusoft.com
343relays.bl.kundenserver.de
326relays.visi.com
315proxies.relays.monkeys.com
289multihop.dsbl.org
272work.drbl.croco.net
262spamsources.relays.osirusoft.com (union of all results)
243spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
243no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
233spam.wytnij.to
229cn-kr.blackholes.us (result 127.0.0.2 = China)
229china.blackholes.us
226no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
218flowgoaway.com
194blacklist.spambag.org
190relays.osirusoft.com (result 127.0.0.9 = open proxy)
189socks.relays.osirusoft.com
180dev.null.dk
163sbl.spamhaus.org
155verio.blackholes.us
149orbs.dorkslayers.com
137opm.blitzed.org
123relays.osirusoft.com (result 127.0.0.6 = spamsites)
121http.opm.blitzed.org
119xo.blackholes.us
113spamhaus.relays.osirusoft.com
113spamsources.fabel.dk
1093y.spam.mrs.kithrup.com
101level3.blackholes.us
99blackhole.compu.net
98brazil.blackholes.us
91spamguard.leadmon.net (union of all results)
87taiwan.blackholes.us
87blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
87dun.dnsrbl.net
79dnsbl.delink.net
75spamguard.leadmon.net (result 127.0.0.2 = dialup)
68internap.blackholes.us
67blocktest.relays.osirusoft.com (not a blacklist!)
61rackspace.blackholes.us
50ciberlynx.blackholes.us
47japan.blackholes.us
45rr.blackholes.us
45formmail.relays.monkeys.com
43argentina.blackholes.us
39singapore.blackholes.us
35inflow.blackholes.us
34dnsbl.njabl.org (result 127.0.0.3 = dialup)
33socks.opm.blitzed.org
32dynablock.wirehub.net (result 127.0.0.2 = dialup)
32dynablock.wirehub.net (union of all results)
31dialups.relays.osirusoft.com (union of all results)
30no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
29eli.blackholes.us
29relays.dorkslayers.com
27dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
24russia.blackholes.us
23relays.osirusoft.com (result 127.0.0.3 = dialup)
19broadwing.blackholes.us
18spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
16nigeria.blackholes.us
15blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
13epoch.blackholes.us
13spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
12he.blackholes.us
8wanadoo-fr.blackholes.us
7proxies.relays.osirusoft.com
7no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
6thailand.blackholes.us
6no-more-funn.moensted.dk (result 127.0.0.9 = misc)
6no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
4dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
3wingate.opm.blitzed.org
3spamguard.leadmon.net (result 127.0.0.3 = spam source)
3blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
2valueweb.blackholes.us
2blackholes.five-ten-sg.com (result 127.0.0.6 = relay)
1skynetweb.blackholes.us
1spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
1spamsites.relays.osirusoft.com (result 127.0.0.6)
1relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
1spamsites.relays.osirusoft.com (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
8422(total number of IP addresses whose names were tested, including 415 at SDSC)
1540(union of all domain zones)
1205abuse.rfc-ignorant.org
482whois.rfc-ignorant.org (union of all results)
257whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
225whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
8dsn.rfc-ignorant.org (zone not intended for this use)
8client-domain.sjesl.monkeys.com
7postmaster.rfc-ignorant.org
6sender-domain.sjesl.monkeys.com (zone not intended for this use)
4helo-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
5655(total number of domains tested, including 194 at SDSC)
1025(union of all domain zones)
418whois.rfc-ignorant.org (union of all results)
405abuse.rfc-ignorant.org
307whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
188postmaster.rfc-ignorant.org
171sender-domain.sjesl.monkeys.com
111whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
106helo-domain.sjesl.monkeys.com (zone not intended for this use)
103dsn.rfc-ignorant.org
75client-domain.sjesl.monkeys.com (zone not intended for this use)
30ex.dnsbl.org (union of all results)
19ex.dnsbl.org (result 127.0.0.2 = spamsites)
11ex.dnsbl.org (result 127.0.0.3 = spam source)
9bandwidth-pigs.monkeys.com
2in.dnsbl.org (result 127.0.0.2 = spam source)
2in.dnsbl.org (union of all results)


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 1 October 2002.