Blacklists Compared

16 February 2002

[ Fighting Spam | 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
6705(total number of IP addresses tested, including 299 at SDSC)
2807(union of most IP zones)
2072xbl.selwerd.cx
1240blackholes.five-ten-sg.com (union of all results)
1007bl.spamcop.net
505dnsbl.njabl.org (union of all results)
498outputs.orbz.org
486dnsbl.njabl.org (result 127.0.0.2 = source or relay)
480block.blars.org
465ztl.dorkslayers.com
395blackholes.intersil.net
385blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
350inputs.orbz.org
349blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
345blackholes.wirehub.net
343blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
331relays.ordb.org
242blacklist.spambag.org
232relays.visi.com
183blackholes.2mbit.com (union of all results)
176blackholes.2mbit.com (result 127.0.0.2 = source or relay)
168orbs.dorkslayers.com
155flowgoaway.com
137blackholes.five-ten-sg.com (result 127.0.0.3 = dialup)
108dev.null.dk
108relays.dorkslayers.com
83proxies.relays.monkeys.com
833y.spam.mrs.kithrup.com
81ipwhois.rfc-ignorant.org
72spamsources.fabel.dk
65relays.osirusoft.com (union of all results)
58blocktest.relays.osirusoft.com (not a blacklist!)
57spam.wytnij.to
52spamguard.leadmon.net (union of all results)
47spammers.v6net.org
33spamguard.leadmon.net (result 127.0.0.2 = dialup)
28relays.osirusoft.com (result 127.0.0.4 = spam source)
27dynablock.wirehub.net (result 127.0.0.2 = dialup)
27dynablock.wirehub.net (union of all results)
24relays.osirusoft.com (result 127.0.0.2 = relay)
24blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
23dews.qmail.org
21inputs.relays.osirusoft.com
19dnsbl.njabl.org (result 127.0.0.3 = dialup)
17spews.relays.osirusoft.com
14opm.blitzed.org
13spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
8http.opm.blitzed.org
8relays.osirusoft.com (result 127.0.0.9 = open socks proxy)
7blackholes.2mbit.com (result 127.0.0.10 = spam haven)
6socks.opm.blitzed.org
6spamguard.leadmon.net (result 127.0.0.3 = spam source)
5socks.relays.osirusoft.com
5dialups.relays.osirusoft.com
5relays.osirusoft.com (result 127.0.0.3 = dialup)
4spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
4spamsources.relays.osirusoft.com (union of all results)
2blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1relays.osirusoft.com (result 127.0.0.6 = spamsites)
1spamhaus.relays.osirusoft.com
1relays.osirusoft.com (result 127.0.0.5 = relay output)
1pm0-no-more.compu.net
1blackhole.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
6705(total number of IP addresses whose names were tested, including 299 at SDSC)
1018(union of all domain zones)
741abuse.rfc-ignorant.org
334whois.rfc-ignorant.org
7postmaster.rfc-ignorant.org
3dsn.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
4631(total number of domains tested, including 49 at SDSC)
478(union of all domain zones)
222whois.rfc-ignorant.org
201abuse.rfc-ignorant.org
81postmaster.rfc-ignorant.org
52dsn.rfc-ignorant.org
7bandwidth-pigs.monkeys.com
1in.dnsbl.org (result 127.0.0.2 = spam source)
1in.dnsbl.org (union of all results)


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 17 February 2002.