Blacklists Compared

27 July 2002

[ Fighting Spam | Dialup Zones | Blacklists Compared | Current Blacklist Comparison ]

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
7850(total number of IP addresses tested, including 371 at SDSC)
3153xbl.selwerd.cx
1994blackholes.five-ten-sg.com (union of all results)
1350bl.spamcop.net
1194relays.osirusoft.com (union of all results)
1115no-more-funn.moensted.dk (union of all results)
952spam.dnsrbl.net
866dnsbl.njabl.org (union of all results)
856dnsbl.njabl.org (result 127.0.0.2 = source or relay)
829blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
789block.blars.org
753ztl.dorkslayers.com
715unconfirmed.dsbl.org
686no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
681blocktest.relays.osirusoft.com (not a blacklist!)
679cn-kr.blackholes.us (union of all results)
634blackholes.wirehub.net
524blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
487t1.bl.reynolds.net.au
483cn-kr.blackholes.us (result 127.0.0.3 = Korea)
483korea.blackholes.us
483ipwhois.rfc-ignorant.org
477relays.osirusoft.com (result 127.0.0.2 = relay)
474korea.services.net
472inputs.relays.osirusoft.com
456relays.osirusoft.com (result 127.0.0.4 = spam source)
440list.dsbl.org
414work.drbl.croco.net
381relays.bl.kundenserver.de
380relays.ordb.org
377spews.relays.osirusoft.com
372relays.visi.com
366blackholes.intersil.net
356ybl.megacity.org
304blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
278proxies.relays.monkeys.com
250multihop.dsbl.org
245dev.null.dk
242blacklist.spambag.org
238blackholes.five-ten-sg.com (result 127.0.0.3 = dialup)
209relays.osirusoft.com (result 127.0.0.9 = open proxy)
205socks.relays.osirusoft.com
205no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
196cn-kr.blackholes.us (result 127.0.0.2 = China)
196china.blackholes.us
185flowgoaway.com
182spam.wytnij.to
169no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
167verio.blackholes.us
1603y.spam.mrs.kithrup.com
153orbs.dorkslayers.com
153spamsources.relays.osirusoft.com (union of all results)
141spamsources.fabel.dk
132opm.blitzed.org
124spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
121dun.dnsrbl.net
109http.opm.blitzed.org
105sbl.spamhaus.org
104relays.osirusoft.com (result 127.0.0.6 = spamsites)
104spamhaus.relays.osirusoft.com
97taiwan.blackholes.us
93spamguard.leadmon.net (union of all results)
91brazil.blackholes.us
89xo.blackholes.us
88blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
68spamguard.leadmon.net (result 127.0.0.2 = dialup)
59japan.blackholes.us
47rackspace.blackholes.us
45inflow.blackholes.us
41spammers.v6net.org
40argentina.blackholes.us
40socks.opm.blitzed.org
39eli.blackholes.us
34dialups.relays.osirusoft.com
32dynablock.wirehub.net (result 127.0.0.2 = dialup)
32no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
32dynablock.wirehub.net (union of all results)
31relays.osirusoft.com (result 127.0.0.3 = dialup)
31formmail.relays.monkeys.com
29blackhole.compu.net
26relays.dorkslayers.com
21spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
19spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
18broadwing.blackholes.us
15proxies.relays.osirusoft.com
14no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
12epoch.blackholes.us
10spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
10relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
10dnsbl.njabl.org (result 127.0.0.3 = dialup)
10blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6valueweb.blackholes.us
6spamsites.relays.osirusoft.com (result 127.0.0.6)
6spamsites.relays.osirusoft.com (union of all results)
5no-more-funn.moensted.dk (result 127.0.0.9 = misc)
4spamguard.leadmon.net (result 127.0.0.3 = spam source)
4no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
3wingate.opm.blitzed.org
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1pm0-no-more.compu.net

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
7850(total number of IP addresses whose names were tested, including 371 at SDSC)
1282(union of all domain zones)
940abuse.rfc-ignorant.org
461whois.rfc-ignorant.org (union of all results)
297whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
164whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
12postmaster.rfc-ignorant.org
10dsn.rfc-ignorant.org (zone not intended for this use)
5client-domain.sjesl.monkeys.com
4sender-domain.sjesl.monkeys.com (zone not intended for this use)
2helo-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
5135(total number of domains tested, including 156 at SDSC)
751(union of all domain zones)
295abuse.rfc-ignorant.org
261whois.rfc-ignorant.org (union of all results)
179whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
168postmaster.rfc-ignorant.org
153sender-domain.sjesl.monkeys.com
91helo-domain.sjesl.monkeys.com (zone not intended for this use)
82whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
78dsn.rfc-ignorant.org
63client-domain.sjesl.monkeys.com (zone not intended for this use)
29ex.dnsbl.org (union of all results)
21ex.dnsbl.org (result 127.0.0.2 = spamsites)
8ex.dnsbl.org (result 127.0.0.3 = spam source)
6bandwidth-pigs.monkeys.com
3in.dnsbl.org (result 127.0.0.2 = spam source)
3in.dnsbl.org (union of all results)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 29 July 2002.