Blacklists Compared

21 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
8355(total number of IP addresses tested, including 418 at SDSC)
4952(union of most IP zones)
3571xbl.selwerd.cx
2393blackholes.five-ten-sg.com (union of all results)
1279block.blars.org
1271no-more-funn.moensted.dk (union of all results)
1258relays.osirusoft.com (union of all results)
1039bl.spamcop.net
929blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
896blackholes.wirehub.net
866dnsbl.njabl.org (union of all results)
848ztl.dorkslayers.com
835dnsbl.njabl.org (result 127.0.0.2 = source or relay)
794cw.blackholes.us
779cn-kr.blackholes.us (union of all results)
752no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
745unconfirmed.dsbl.org
729spam.dnsrbl.net
665blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
610t1.bl.reynolds.net.au
537blackholes.intersil.net
520ipwhois.rfc-ignorant.org
509ybl.megacity.org
508relays.osirusoft.com (result 127.0.0.4 = spam source)
489cn-kr.blackholes.us (result 127.0.0.3 = Korea)
489korea.blackholes.us
484korea.services.net
472mail-abuse.blacklist.jippg.org
464list.dsbl.org
460inputs.relays.osirusoft.com
458relays.osirusoft.com (result 127.0.0.2 = relay)
406assholes.madscience.nl
380proxies.relays.monkeys.com
374spews.relays.osirusoft.com
360blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
351relays.ordb.org
351relays.bl.kundenserver.de
342relays.visi.com
336blackholes.five-ten-sg.com (result 127.0.0.3 = dialup)
290cn-kr.blackholes.us (result 127.0.0.2 = China)
290china.blackholes.us
276spamsources.relays.osirusoft.com (union of all results)
258spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
251multihop.dsbl.org
249relays.osirusoft.com (result 127.0.0.9 = open proxy)
247socks.relays.osirusoft.com
238no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
229no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
227spam.wytnij.to
222flowgoaway.com
207blacklist.spambag.org
202sbl.spamhaus.org
201relays.osirusoft.com (result 127.0.0.6 = spamsites)
200spamhaus.relays.osirusoft.com
192dev.null.dk
177orbs.dorkslayers.com
151opm.blitzed.org
149verio.blackholes.us
1393y.spam.mrs.kithrup.com
137http.opm.blitzed.org
130spamsources.fabel.dk
112brazil.blackholes.us
107dun.dnsrbl.net
102xo.blackholes.us
94level3.blackholes.us
90spamguard.leadmon.net (union of all results)
84taiwan.blackholes.us
84blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
77spamguard.leadmon.net (result 127.0.0.2 = dialup)
76blocktest.relays.osirusoft.com (not a blacklist!)
74rackspace.blackholes.us
65blackhole.compu.net
61dnsbl.delink.net
55japan.blackholes.us
52ciberlynx.blackholes.us
48formmail.relays.monkeys.com
47rr.blackholes.us
42argentina.blackholes.us
42relays.dorkslayers.com
41dialups.relays.osirusoft.com (union of all results)
35inflow.blackholes.us
33no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
31dnsbl.njabl.org (result 127.0.0.3 = dialup)
29dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
28eli.blackholes.us
27dynablock.wirehub.net (result 127.0.0.2 = dialup)
27russia.blackholes.us
27dynablock.wirehub.net (union of all results)
26socks.opm.blitzed.org
26work.drbl.croco.net
24relays.osirusoft.com (result 127.0.0.3 = dialup)
21nigeria.blackholes.us
17broadwing.blackholes.us
17spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
14proxies.relays.osirusoft.com
12wanadoo-fr.blackholes.us
12dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
11blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
10spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
10no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
9thailand.blackholes.us
8epoch.blackholes.us
7blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
5no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
4no-more-funn.moensted.dk (result 127.0.0.9 = misc)
3spamguard.leadmon.net (result 127.0.0.3 = spam source)
2valueweb.blackholes.us
2skynetweb.blackholes.us
2wingate.opm.blitzed.org
2spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
2relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
1spamsites.relays.osirusoft.com (result 127.0.0.6)
1blackholes.five-ten-sg.com (result 127.0.0.6 = relay)
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
8355(total number of IP addresses whose names were tested, including 418 at SDSC)
1527(union of all domain zones)
1205abuse.rfc-ignorant.org
477whois.rfc-ignorant.org (union of all results)
266whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
211whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
9postmaster.rfc-ignorant.org
9client-domain.sjesl.monkeys.com
6dsn.rfc-ignorant.org (zone not intended for this use)
5sender-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
5777(total number of domains tested, including 208 at SDSC)
950(union of all domain zones)
419abuse.rfc-ignorant.org
321whois.rfc-ignorant.org (union of all results)
227whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
211postmaster.rfc-ignorant.org
171sender-domain.sjesl.monkeys.com
109helo-domain.sjesl.monkeys.com (zone not intended for this use)
104dsn.rfc-ignorant.org
94whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
78client-domain.sjesl.monkeys.com (zone not intended for this use)
32ex.dnsbl.org (union of all results)
21ex.dnsbl.org (result 127.0.0.2 = spamsites)
11ex.dnsbl.org (result 127.0.0.3 = spam source)
10bandwidth-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 24 September 2002.