Blacklists Compared

1 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
9463(total number of IP addresses tested, including 525 at SDSC)
5784(union of most IP zones)
4072xbl.selwerd.cx
3120blackholes.five-ten-sg.com (union of all results)
2039blackholes.wirehub.net
1929relays.osirusoft.com (union of all results)
1708t1.bl.reynolds.net.au
1672no-more-funn.moensted.dk (union of all results)
1549block.blars.org
1147bl.spamcop.net
1144unconfirmed.dsbl.org
1140ztl.dorkslayers.com
1125blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
1032blackholes.intersil.net
945assholes.madscience.nl
924blocktest.relays.osirusoft.com (not a blacklist!)
893list.dsbl.org
888relays.osirusoft.com (result 127.0.0.4 = spam source)
888dnsbl.njabl.org (union of all results)
883sbl.spamhaus.org
871spamhaus.relays.osirusoft.com
866blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
853spews.relays.osirusoft.com
821relays.osirusoft.com (result 127.0.0.6 = spamsites)
747no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
686cn-kr.blackholes.us (union of all results)
679blackholes.five-ten-sg.com (result 127.0.0.3 = dialup)
643proxies.relays.monkeys.com (union of all results)
639proxies.relays.monkeys.com (result 127.0.0.2 = open proxy)
632dnsbl.sorbs.net (union of all results)
624spews.bl.reynolds.net.au
621cw.blackholes.us
585opm.blitzed.org
564ipwhois.rfc-ignorant.org
517http.opm.blitzed.org
506dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
495ybl.megacity.org
484work.drbl.croco.net
478spam.dnsrbl.net
455dnsbl.njabl.org (result 127.0.0.4 = spam source)
419cn-kr.blackholes.us (result 127.0.0.3 = Korea)
419korea.blackholes.us
417korea.services.net
363blackholes.uceb.org (union of all results)
346no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
344blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
336dnsbl.njabl.org (result 127.0.0.2 = source or relay)
334spamsources.fabel.dk
331no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
306inputs.relays.osirusoft.com
305relays.osirusoft.com (result 127.0.0.2 = relay)
300rackspace.blackholes.us
278relays.osirusoft.com (result 127.0.0.9 = open proxy)
275socks.relays.osirusoft.com
269blacklist.spambag.org
268spam.wytnij.to
267cn-kr.blackholes.us (result 127.0.0.2 = China)
267china.blackholes.us
248dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
246dnsbl.delink.net
229flowgoaway.com
221blackholes.uceb.org (result 127.0.0.4 = spam organization)
213socks.opm.blitzed.org
213multihop.dsbl.org
198mail-abuse.blacklist.jippg.org
194spamsources.relays.osirusoft.com (union of all results)
187spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
183verio.blackholes.us
176relays.bl.kundenserver.de
131no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
122brazil.blackholes.us
119dynablock.wirehub.net (result 127.0.0.2 = dialup)
119dynablock.wirehub.net (union of all results)
116internap.blackholes.us
113relays.ordb.org
112spamguard.leadmon.net (union of all results)
111vox.schpider.com
104blackhole.compu.net
98spamguard.leadmon.net (result 127.0.0.2 = dialup)
90xo.blackholes.us
89blackholes.uceb.org (result 127.0.0.3 = spam source)
89dnsbl.njabl.org (result 127.0.0.3 = dialup)
88rr.blackholes.us
85orbs.dorkslayers.com
85dun.dnsrbl.net
85dialups.relays.osirusoft.com (union of all results)
83dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
75taiwan.blackholes.us
74blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
72level3.blackholes.us
69blackholes.uceb.org (result 127.0.0.2 = relay)
65spam.exsilia.net (result 127.0.0.2 = spam source)
65spam.exsilia.net (union of all results)
63no-more-funn.moensted.dk (result 127.0.0.9 = misc)
61relays.osirusoft.com (result 127.0.0.3 = dialup)
59blackholes.brainerd.net
54japan.blackholes.us
52dialups.visi.com
42tr.countries.nerd.dk
39argentina.blackholes.us
35russia.blackholes.us
34inflow.blackholes.us
34dnsbl.sorbs.net (result 127.0.0.6 = spam source)
34inflow.noflow.org
32interbusiness.blackholes.us
29hongkong.blackholes.us
28above.blackholes.us
27singapore.blackholes.us
26cybercon.blackholes.us
25no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
22relays.dorkslayers.com
21he.blackholes.us
21no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
20dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
19blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
18nigeria.blackholes.us
17spammers.v6net.org
16eli.blackholes.us
14ph.rbl.cluecentral.net
13broadwing.blackholes.us
13spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
133y.spam.mrs.kithrup.com
13blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
12valuenet.blackholes.us
12proxies.relays.osirusoft.com
11thailand.blackholes.us
11epoch.blackholes.us
11covad.blackholes.us
10malaysia.blackholes.us
10ciberlynx.blackholes.us
9affinity.blackholes.us
7wingate.opm.blitzed.org
7dnsbl.njabl.org (result 127.0.0.9 = open proxy)
7no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
6yipes.blackholes.us
5wanadoo-fr.blackholes.us
5valueweb.blackholes.us
5dev.null.dk
4spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
4proxies.relays.monkeys.com (result 127.0.0.3 = proxy output)
3pajo.blackholes.us
3spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
3relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
3dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
3dialup.blacklist.jippg.org (union of all results)
2dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
2proxies.exsilia.net
1skynetweb.blackholes.us
1dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
1spamsites.relays.osirusoft.com (result 127.0.0.6)
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1no-more-funn.moensted.dk (result 127.0.0.11 = repeated probes)
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
9463(total number of IP addresses whose names were tested, including 525 at SDSC)
1983(union of all domain zones)
1352whois.rfc-ignorant.org (union of all results)
1248abuse.rfc-ignorant.org
1123whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
229whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
14postmaster.rfc-ignorant.org
13dsn.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
6680(total number of domains tested, including 238 at SDSC)
1079(union of all domain zones)
509abuse.rfc-ignorant.org
429whois.rfc-ignorant.org (union of all results)
327whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
251postmaster.rfc-ignorant.org
179dsn.rfc-ignorant.org
102whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
27ex.dnsbl.org (union of all results)
22ex.dnsbl.org (result 127.0.0.2 = spamsites)
7bandwidth-pigs.monkeys.com
5ex.dnsbl.org (result 127.0.0.3 = spam source)
4in.dnsbl.org (union of all results)
3in.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 4 February 2003.