Blacklists Compared

10 May 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 and block.blars.org zones zone because they are too aggressive to be widely useful, and the blocktest.relays.osirusoft.com and query.bondedsender.org zones are also excluded because they are not blacklists.

HitsDNS Zone
12183(total number of IP addresses tested, including 458 at SDSC)
7988(union of most IP zones)
6211xbl.selwerd.cx
4122t1.bl.reynolds.net.au
3443blackholes.five-ten-sg.com (union of all results)
3340blackholes.wirehub.net
3215block.blars.org
2846unconfirmed.dsbl.org
2762no-more-funn.moensted.dk (union of all results)
2570list.dsbl.org
2525dnsbl.njabl.org (union of all results)
2475dnsbl.sorbs.net (union of all results)
2237proxies.blackholes.wirehub.net
2136dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
2115blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
2055relays.osirusoft.com (union of all results)
2016bl.spamcop.net
1820dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1756proxies.relays.monkeys.com (result 127.0.0.2 = open proxy)
1756proxies.relays.monkeys.com (union of all results)
1688opm.blitzed.org
1590dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1354no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1346cn-kr.blackholes.us (union of all results)
1158ztl.dorkslayers.com
1065blocktest.relays.osirusoft.com (not a blacklist!)
982spews.bl.reynolds.net.au
948ipwhois.rfc-ignorant.org
937blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
929work.drbl.croco.net
838no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
819spews.relays.osirusoft.com
782relays.osirusoft.com (result 127.0.0.4 = spam source)
720relays.osirusoft.com (result 127.0.0.9 = open proxy)
705socks.relays.osirusoft.com
686cn-kr.blackholes.us (result 127.0.0.2 = China)
686china.blackholes.us
660cn-kr.blackholes.us (result 127.0.0.3 = Korea)
660korea.blackholes.us
660sbl.spamhaus.org
655spam.dnsrbl.net
649korea.services.net
629cw.blackholes.us
610spamhaus.relays.osirusoft.com
583blackholes.intersil.net
578ybl.megacity.org
564relays.osirusoft.com (result 127.0.0.6 = spamsites)
490spamsources.fabel.dk
474dnsbl.njabl.org (result 127.0.0.4 = spam source)
454dnsbl.delink.net
392blackhole.compu.net
369spam.wytnij.to
366blacklist.spambag.org
319level3.blackholes.us
313dnsbl.njabl.org (result 127.0.0.2 = source or relay)
295spamguard.leadmon.net (union of all results)
285sbbl.they.com
280no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
277mail-abuse.blacklist.jippg.org
275blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
274spamguard.leadmon.net (result 127.0.0.2 = dialup)
272dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
249relays.osirusoft.com (result 127.0.0.2 = relay)
248inputs.relays.osirusoft.com
228brazil.blackholes.us
220multihop.dsbl.org
216blackholes.uceb.org (union of all results)
175flowgoaway.com
172spamsources.relays.osirusoft.com (union of all results)
170rr.blackholes.us
158taiwan.blackholes.us
157spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
150verio.blackholes.us
149dun.dnsrbl.net
143dnsbl.njabl.org (result 127.0.0.3 = dialup)
143query.bondedsender.org (not a blacklist!)
139dialups.visi.com
1353y.spam.mrs.kithrup.com
134relays.bl.kundenserver.de
128no-more-funn.moensted.dk (result 127.0.0.9 = misc)
126dynablock.wirehub.net (result 127.0.0.2 = dialup)
126dynablock.wirehub.net (union of all results)
125xo.blackholes.us
120blackholes.uceb.org (result 127.0.0.3 = spam source)
117dialups.relays.osirusoft.com (union of all results)
113dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
111relays.ordb.org
110bl.deadbeef.com
108no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
104relays.osirusoft.com (result 127.0.0.3 = dialup)
97orbs.dorkslayers.com
92internap.blackholes.us
91dnsbl.sorbs.net (result 127.0.0.6 = spam source)
90vox.schpider.com
86charter.blackholes.us
80hongkong.blackholes.us
79qwest.blackholes.us
77japan.blackholes.us
66blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
60interbusiness.blackholes.us
60argentina.blackholes.us
57blackholes.brainerd.net
54blackholes.uceb.org (result 127.0.0.2 = relay)
54bl.deadbeef.com
45tr.countries.nerd.dk
42russia.blackholes.us
36inflow.blackholes.us
35blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
33rackspace.blackholes.us
33above.blackholes.us
33blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
32proxies.relays.osirusoft.com
29singapore.blackholes.us
29cybercon.blackholes.us
29spam.exsilia.net (union of all results)
28infolink.blackholes.us
26he.blackholes.us
26spam.exsilia.net (result 127.0.0.2 = spam source)
25covad.blackholes.us
25no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
22malaysia.blackholes.us
22no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
21wanadoo-fr.blackholes.us
21spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
20nigeria.blackholes.us
20ph.rbl.cluecentral.net
19telstra.blackholes.us
18thailand.blackholes.us
18eli.blackholes.us
15dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
15dialup.blacklist.jippg.org (union of all results)
14blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
13relays.dorkslayers.com
12yipes.blackholes.us
12broadwing.blackholes.us
12spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
11valuenet.blackholes.us
10maxim.blackholes.us
9hostnoc.blackholes.us
9epoch.blackholes.us
9blackholes.uceb.org (result 127.0.0.4 = spam source network)
8spammers.v6net.org
7pajo.blackholes.us
7affinity.blackholes.us
7no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
6valueweb.blackholes.us
5skynetweb.blackholes.us
5spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
5dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
4olm.blackholes.us
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
4dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
4dev.null.dk
3dnsbl.sorbs.net (result 127.0.0.5 = open relay)
3dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
3relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
3blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
3spam.exsilia.net (result 127.0.0.3 = virus source)
1ciberlynx.blackholes.us
1spamsites.relays.osirusoft.com (result 127.0.0.6)
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
12183(total number of IP addresses whose names were tested, including 458 at SDSC)
2855(union of all domain zones)
2437abuse.rfc-ignorant.org
661whois.rfc-ignorant.org (union of all results)
371whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
291whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
10postmaster.rfc-ignorant.org
10dsn.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
7315(total number of domains tested, including 238 at SDSC)
1398(union of all domain zones)
661abuse.rfc-ignorant.org
573whois.rfc-ignorant.org (union of all results)
424whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
368postmaster.rfc-ignorant.org
276dsn.rfc-ignorant.org
149whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
71bl.deadbeef.com
26ex.dnsbl.org (union of all results)
24ex.dnsbl.org (result 127.0.0.2 = spamsites)
8bandwidth-pigs.monkeys.com
6in.dnsbl.org (union of all results)
4in.dnsbl.org (result 127.0.0.6 = unconfirmed opt-in)
2in.dnsbl.org (result 127.0.0.2 = spam source)
2ex.dnsbl.org (result 127.0.0.3 = spam source)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 14 May 2003.