Blacklists Compared

20 December 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 exemptions.ahbl.org and query.bondedsender.org zones because they are not blacklists, and because it is too aggressive to be widely useful the block.blars.org zone is also excluded.

HitsDNS Zone
17509(total number of IP addresses tested, including 388 at SDSC)
13334(union of most IP zones)
8778t1.dnsbl.net.au
7933dnsbl.sorbs.net (union of all results)
7115block.blars.org
7039blackholes.five-ten-sg.com (union of all results)
6000blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
5596dnsbl.sorbs.net (result 127.0.0.10 = dialup)
5063unconfirmed.dsbl.org
4911list.dsbl.org
4910dsbl.dnsbl.net.au
4721cbl.abuseat.org
4487bl.spamcop.net
3670no-more-funn.moensted.dk (union of all results)
3596dnsbl.njabl.org (union of all results)
3238sbl.csma.biz
2102cn-kr.blackholes.us (union of all results)
1681dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1622bl.csma.biz
1616no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1612no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1551l2.spews.dnsbl.sorbs.net
1516dnsbl.ahbl.org (union of all results)
1257l1.spews.dnsbl.sorbs.net
1255spews.dnsbl.net.au
1252cn-kr.blackholes.us (result 127.0.0.2 = China)
1252china.blackholes.us
1203dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1170sbl.spamhaus.org
1145psbl.surriel.com
1120ipwhois.rfc-ignorant.org
1098dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1020dnsbl.njabl.org (result 127.0.0.3 = dialup)
978dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
850cn-kr.blackholes.us (result 127.0.0.3 = Korea)
850korea.blackholes.us
843korea.services.net
789unsure.nether.net
718blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
701rmst.dnsbl.net.au
697dnsbl.njabl.org (result 127.0.0.4 = spam source)
691probes.dnsbl.net.au
686spamsources.fabel.dk
682ybl.megacity.org
657relays.visi.com
530dnsbl.sorbs.net (result 127.0.0.6 = spam source)
496pss.spambusters.org.ar
489cw.blackholes.us
474comcast.blackholes.us
471relaywatcher.n13mbl.com
464blacklist.spambag.org
441work.drbl.croco.net
419dnsbl.ahbl.org (result 127.0.0.4 = spam source)
405spamguard.leadmon.net (union of all results)
390opm.blitzed.org
389spamguard.leadmon.net (result 127.0.0.2 = dialup)
376blackholes.intersil.net
360level3.blackholes.us
351rr.blackholes.us
266brazil.blackholes.us
256ricn.dnsbl.net.au
255blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
239no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
225dnsbl.antispam.or.id
221taiwan.blackholes.us
219dnsbl.njabl.org (result 127.0.0.2 = source or relay)
203charter.blackholes.us
185no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
170dialup.blacklist.jippg.org (union of all results)
166dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
1503y.spam.mrs.kithrup.com
147spam.wytnij.to
144relays.ordb.org
142japan.blackholes.us
142sbbl.they.com
136xo.blackholes.us
134verio.blackholes.us
126qwest.blackholes.us
125wanadoo-fr.blackholes.us
125multihop.dsbl.org
119dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
119mail-abuse.blacklist.jippg.org
115internap.blackholes.us
108singapore.blackholes.us
99interbusiness.blackholes.us
95russia.blackholes.us
87mexico.blackholes.us
87query.bondedsender.org (not a blacklist!)
85ohps.dnsbl.net.au
85flowgoaway.com
84osps.dnsbl.net.au
83relays.nether.net
79dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
73argentina.blackholes.us
70rogers.blackholes.us
70hongkong.blackholes.us
69turkey.blackholes.us
69tr.countries.nerd.dk
59above.blackholes.us
59osrs.dnsbl.net.au
59rdts.dnsbl.net.au
51dun.dnsrbl.net
48blackholes.uceb.org (union of all results)
46spam.exsilia.net (union of all results)
43a2000.blackholes.us
42inflow.blackholes.us
39he.blackholes.us
37bellsouth.blackholes.us
35no-more-funn.moensted.dk (result 127.0.0.9 = misc)
34infolink.blackholes.us
34blackholes.brainerd.net
32nigeria.blackholes.us
32cybercon.blackholes.us
30spam.exsilia.net (result 127.0.0.2 = spam source)
29telstra.blackholes.us
29exemptions.ahbl.org (not a blacklist!)
28covad.blackholes.us
28blackholes.uceb.org (result 127.0.0.3 = spam source)
26satos.rbl.cluecentral.net
24malaysia.blackholes.us
24relays.bl.kundenserver.de
24blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
22dnsbl.sorbs.net (result 127.0.0.5 = open relay)
22blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
19broadwing.blackholes.us
18rackspace.blackholes.us
17ph.rbl.cluecentral.net
16blackholes.uceb.org (result 127.0.0.2 = open relay)
16spam.exsilia.net (result 127.0.0.3 = virus source)
13eli.blackholes.us
13spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
12bl.deadbeef.com
11thailand.blackholes.us
10pajo.blackholes.us
8yipes.blackholes.us
8olm.blackholes.us
7burst.blackholes.us
7no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
7no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
7blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
7blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
6affinity.blackholes.us
6owps.dnsbl.net.au
6blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
4spamsources.yamta.org (result 127.0.0.2 = spam source)
4navisite.blackholes.us
4maxim.blackholes.us
4epoch.blackholes.us
4t3direct.dnsbl.net.au
4dev.null.dk
4dialup.blacklist.jippg.org (result 127.0.0.4 = dialup in Japan)
3blackholes.uceb.org (result 127.0.0.4 = spam source network)
3spamguard.leadmon.net (result 127.0.0.3 = spam source)
2dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
2spamsites.dnsbl.net.au
2omrs.dnsbl.net.au
2dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
1ciberlynx.blackholes.us
1blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
1owfs.dnsbl.net.au
1dnsbl.njabl.org (result 127.0.0.5 = relay output)
1no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
1dnsbl.ahbl.org (result 127.0.0.7 = spam haven)

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.

Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses.

HitsDNS Zone
17509(total number of IP addresses whose names were tested, including 388 at SDSC)
8785(union of all domain zones)
6351abuse.rfc-ignorant.org
4348rddn.dnsbl.net.au
1216whois.rfc-ignorant.org (union of all results)
839blackhole.securitysage.com
738bulk.rhs.mailpolice.com
665whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
551whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
166bl.deadbeef.com
126rhsbl.ahbl.org
95porn.rhs.mailpolice.com
13dsn.rfc-ignorant.org (zone not intended for this use)
12postmaster.rfc-ignorant.org

Survey results for all known public domain-name-based DNS blacklists. Lookups were done on SMTP sender domains.

HitsDNS Zone
10701(total number of domains tested, including 271 at SDSC)
3996(union of all domain zones)
1513bulk.rhs.mailpolice.com
1145whois.rfc-ignorant.org (union of all results)
1009whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
999abuse.rfc-ignorant.org
686blackhole.securitysage.com
536postmaster.rfc-ignorant.org
519dsn.rfc-ignorant.org
136whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
116rhsbl.ahbl.org
60bl.deadbeef.com
57porn.rhs.mailpolice.com
30ex.dnsbl.org (union of all results)
28ex.dnsbl.org (result 127.0.0.2 = spamsites)
22rddn.dnsbl.net.au (zone not intended for this use)
2rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
2ex.dnsbl.org (result 127.0.0.3 = spam source)
2rhsbl.sorbs.net (union of all results)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 28 December 2003.