Blacklists Compared

22 February 2003

[ 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 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
9838(total number of IP addresses tested, including 455 at SDSC)
6385(union of most IP zones)
4658xbl.selwerd.cx
3570blackholes.five-ten-sg.com (union of all results)
2758t1.bl.reynolds.net.au
2281blackholes.wirehub.net
1999no-more-funn.moensted.dk (union of all results)
1948relays.osirusoft.com (union of all results)
1915block.blars.org
1699unconfirmed.dsbl.org
1357list.dsbl.org
1264bl.spamcop.net
1261dnsbl.njabl.org (union of all results)
1157ztl.dorkslayers.com
1127blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
1067blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
1062dnsbl.sorbs.net (union of all results)
1061proxies.relays.monkeys.com (result 127.0.0.2 = open proxy)
1061proxies.relays.monkeys.com (union of all results)
991cn-kr.blackholes.us (union of all results)
976no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
893blackholes.five-ten-sg.com (result 127.0.0.3 = dialup)
851blackholes.intersil.net
817sbl.spamhaus.org
807spamhaus.relays.osirusoft.com
795dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
765relays.osirusoft.com (result 127.0.0.6 = spamsites)
763blocktest.relays.osirusoft.com (not a blacklist!)
743relays.osirusoft.com (result 127.0.0.4 = spam source)
742spews.bl.reynolds.net.au
735spews.relays.osirusoft.com
711ipwhois.rfc-ignorant.org
685opm.blitzed.org
637cw.blackholes.us
614dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
579spam.dnsrbl.net
575korea.services.net
573cn-kr.blackholes.us (result 127.0.0.3 = Korea)
572korea.blackholes.us
570assholes.madscience.nl
543ybl.megacity.org
534dnsbl.njabl.org (result 127.0.0.4 = spam source)
474no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
418cn-kr.blackholes.us (result 127.0.0.2 = China)
418china.blackholes.us
406blackholes.uceb.org (union of all results)
403relays.osirusoft.com (result 127.0.0.9 = open proxy)
394socks.relays.osirusoft.com
374dnsbl.delink.net
373spamsources.fabel.dk
367dnsbl.njabl.org (result 127.0.0.2 = source or relay)
355blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
350work.drbl.croco.net
333spam.wytnij.to
299relays.osirusoft.com (result 127.0.0.2 = relay)
299inputs.relays.osirusoft.com
290multihop.dsbl.org
285no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
265blacklist.spambag.org
261mail-abuse.blacklist.jippg.org
257dnsbl.njabl.org (result 127.0.0.9 = open proxy)
220flowgoaway.com
219blackholes.uceb.org (result 127.0.0.4 = spam organization)
186brazil.blackholes.us
182rackspace.blackholes.us
178relays.bl.kundenserver.de
154verio.blackholes.us
152dun.dnsrbl.net
1413y.spam.mrs.kithrup.com
141spamguard.leadmon.net (union of all results)
136spamsources.relays.osirusoft.com (union of all results)
131spamguard.leadmon.net (result 127.0.0.2 = dialup)
124blackholes.uceb.org (result 127.0.0.3 = spam source)
124spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
123rr.blackholes.us
122relays.ordb.org
110vox.schpider.com
105no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
104taiwan.blackholes.us
98dnsbl.njabl.org (result 127.0.0.3 = dialup)
98orbs.dorkslayers.com
90dynablock.wirehub.net (result 127.0.0.2 = dialup)
90internap.blackholes.us
90dynablock.wirehub.net (union of all results)
80level3.blackholes.us
77blackholes.uceb.org (result 127.0.0.2 = relay)
77dialups.relays.osirusoft.com (union of all results)
74dialups.visi.com
73no-more-funn.moensted.dk (result 127.0.0.9 = misc)
71blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
69dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
64blackhole.compu.net
61blackholes.brainerd.net
53xo.blackholes.us
53no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
52relays.osirusoft.com (result 127.0.0.3 = dialup)
51japan.blackholes.us
51argentina.blackholes.us
47dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
43russia.blackholes.us
43hongkong.blackholes.us
41cybercon.blackholes.us
39spam.exsilia.net (result 127.0.0.2 = spam source)
39spam.exsilia.net (union of all results)
37dnsbl.sorbs.net (result 127.0.0.6 = spam source)
33interbusiness.blackholes.us
33tr.countries.nerd.dk
31no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
30inflow.blackholes.us
30inflow.noflow.org
28singapore.blackholes.us
28above.blackholes.us
26blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
25dev.null.dk
24nigeria.blackholes.us
24eli.blackholes.us
22ph.rbl.cluecentral.net
19blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
16he.blackholes.us
16relays.dorkslayers.com
15covad.blackholes.us
14broadwing.blackholes.us
14proxies.relays.osirusoft.com
13spammers.v6net.org
13dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
13dialup.blacklist.jippg.org (union of all results)
12valuenet.blackholes.us
12thailand.blackholes.us
11epoch.blackholes.us
11blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
9yipes.blackholes.us
9spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
8wanadoo-fr.blackholes.us
8spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
8dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
7ciberlynx.blackholes.us
6pajo.blackholes.us
6malaysia.blackholes.us
5affinity.blackholes.us
5dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
4valueweb.blackholes.us
4spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
4relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
1spamsites.relays.osirusoft.com (result 127.0.0.6)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1no-more-funn.moensted.dk (result 127.0.0.11 = repeated probes)
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
1blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
1proxies.exsilia.net
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
9838(total number of IP addresses whose names were tested, including 455 at SDSC)
2312(union of all domain zones)
1546abuse.rfc-ignorant.org
1495whois.rfc-ignorant.org (union of all results)
1239whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
256whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
12postmaster.rfc-ignorant.org
11dsn.rfc-ignorant.org (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
6751(total number of domains tested, including 232 at SDSC)
1138(union of all domain zones)
540abuse.rfc-ignorant.org
474whois.rfc-ignorant.org (union of all results)
320whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
272postmaster.rfc-ignorant.org
190dsn.rfc-ignorant.org
155whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
30ex.dnsbl.org (union of all results)
26ex.dnsbl.org (result 127.0.0.2 = spamsites)
8bandwidth-pigs.monkeys.com
5in.dnsbl.org (union of all results)
4ex.dnsbl.org (result 127.0.0.3 = spam source)
4in.dnsbl.org (result 127.0.0.6 = unconfirmed opt-in)
1in.dnsbl.org (result 127.0.0.2 = spam source)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 25 February 2003.