Blacklists Compared

6 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
16792(total number of IP addresses tested, including 381 at SDSC)
12615(union of most IP zones)
8229t1.dnsbl.net.au
7249dnsbl.sorbs.net (union of all results)
6710block.blars.org
6412blackholes.five-ten-sg.com (union of all results)
5260blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
4931dnsbl.sorbs.net (result 127.0.0.10 = dialup)
4663unconfirmed.dsbl.org
4511list.dsbl.org
4510dsbl.dnsbl.net.au
4106cbl.abuseat.org
3361no-more-funn.moensted.dk (union of all results)
3319bl.spamcop.net
2970dnsbl.njabl.org (union of all results)
2548sbl.csma.biz
2121cn-kr.blackholes.us (union of all results)
2110unsure.nether.net
1689no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1684pdl.dnsbl.net.au
1669dialups.visi.com
1564dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1555l2.spews.dnsbl.sorbs.net
1429spam.wytnij.to
1386dnsbl.ahbl.org (union of all results)
1370ipwhois.rfc-ignorant.org
1318cn-kr.blackholes.us (result 127.0.0.2 = China)
1318china.blackholes.us
1260l1.spews.dnsbl.sorbs.net
1260spews.dnsbl.net.au
1256dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1227no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1091sbl.spamhaus.org
1089psbl.surriel.com
1035dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1013dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
941bl.csma.biz
817blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
803cn-kr.blackholes.us (result 127.0.0.3 = Korea)
803korea.blackholes.us
795korea.services.net
764spamsources.fabel.dk
750rmst.dnsbl.net.au
689ybl.megacity.org
658dnsbl.sorbs.net (result 127.0.0.6 = spam source)
626probes.dnsbl.net.au
606dnsbl.njabl.org (result 127.0.0.3 = dialup)
570relays.visi.com
559dnsbl.njabl.org (result 127.0.0.4 = spam source)
510cw.blackholes.us
508pss.spambusters.org.ar
494ricn.dnsbl.net.au
464relaywatcher.n13mbl.com
450spamguard.leadmon.net (union of all results)
447blacklist.spambag.org
438spamguard.leadmon.net (result 127.0.0.2 = dialup)
380work.drbl.croco.net
377blackholes.intersil.net
373dnsbl.ahbl.org (result 127.0.0.4 = spam source)
355comcast.blackholes.us
345level3.blackholes.us
321rr.blackholes.us
309brazil.blackholes.us
290opm.blitzed.org
255dnsbl.njabl.org (result 127.0.0.2 = source or relay)
254blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
248no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
219taiwan.blackholes.us
188no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
185relays.ordb.org
164charter.blackholes.us
163xo.blackholes.us
151sbbl.they.com
149japan.blackholes.us
139verio.blackholes.us
137dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
131qwest.blackholes.us
130multihop.dsbl.org
118dnsbl.antispam.or.id
117mail-abuse.blacklist.jippg.org
115mexico.blackholes.us
110query.bondedsender.org (not a blacklist!)
108dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
108dialup.blacklist.jippg.org (union of all results)
105osrs.dnsbl.net.au
103internap.blackholes.us
98wanadoo-fr.blackholes.us
96relays.nether.net
953y.spam.mrs.kithrup.com
86interbusiness.blackholes.us
86hongkong.blackholes.us
86flowgoaway.com
82argentina.blackholes.us
70singapore.blackholes.us
69ohps.dnsbl.net.au
68dun.dnsrbl.net
64russia.blackholes.us
63he.blackholes.us
59osps.dnsbl.net.au
54rogers.blackholes.us
54bellsouth.blackholes.us
50blackholes.uceb.org (union of all results)
47above.blackholes.us
40inflow.blackholes.us
39turkey.blackholes.us
39rdts.dnsbl.net.au
39tr.countries.nerd.dk
38nigeria.blackholes.us
38relays.bl.kundenserver.de
38spam.exsilia.net (union of all results)
37dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
34blackholes.brainerd.net
33no-more-funn.moensted.dk (result 127.0.0.9 = misc)
32blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
31rackspace.blackholes.us
31covad.blackholes.us
30telstra.blackholes.us
30spam.exsilia.net (result 127.0.0.2 = spam source)
29cybercon.blackholes.us
29a2000.blackholes.us
28infolink.blackholes.us
26blackholes.uceb.org (result 127.0.0.3 = spam source)
25exemptions.ahbl.org (not a blacklist!)
23blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
21blackholes.uceb.org (result 127.0.0.2 = open relay)
19malaysia.blackholes.us
19eli.blackholes.us
19satos.rbl.cluecentral.net
17vox.schpider.com
17yipes.blackholes.us
16broadwing.blackholes.us
15thailand.blackholes.us
15bl.deadbeef.com
14ph.rbl.cluecentral.net
12blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
11blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
10spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
9dnsbl.sorbs.net (result 127.0.0.5 = open relay)
8pajo.blackholes.us
8spam.exsilia.net (result 127.0.0.3 = virus source)
7maxim.blackholes.us
7no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
6spamsources.yamta.org (result 127.0.0.2 = spam source)
6affinity.blackholes.us
5olm.blackholes.us
5epoch.blackholes.us
5t3direct.dnsbl.net.au
5no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
4burst.blackholes.us
4owps.dnsbl.net.au
4omrs.dnsbl.net.au
3blackholes.uceb.org (result 127.0.0.4 = spam source network)
3dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
3dev.null.dk
3blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
2ciberlynx.blackholes.us
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
1owfs.dnsbl.net.au
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
1no-more-funn.moensted.dk (result 127.0.0.8 = open web form)

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
16792(total number of IP addresses whose names were tested, including 381 at SDSC)
7665(union of all domain zones)
4790abuse.rfc-ignorant.org
3660rddn.dnsbl.net.au
1104whois.rfc-ignorant.org (union of all results)
713bulk.rhs.mailpolice.com
609whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
495whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
482blackhole.securitysage.com
124bl.deadbeef.com
120rhsbl.ahbl.org
79porn.rhs.mailpolice.com
13postmaster.rfc-ignorant.org
12dsn.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
10009(total number of domains tested, including 239 at SDSC)
3436(union of all domain zones)
1195bulk.rhs.mailpolice.com
951whois.rfc-ignorant.org (union of all results)
930abuse.rfc-ignorant.org
821whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
732blackhole.securitysage.com
494postmaster.rfc-ignorant.org
494dsn.rfc-ignorant.org
130whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
119rhsbl.ahbl.org
53bl.deadbeef.com
47porn.rhs.mailpolice.com
37ex.dnsbl.org (union of all results)
34ex.dnsbl.org (result 127.0.0.2 = spamsites)
24rddn.dnsbl.net.au (zone not intended for this use)
3ex.dnsbl.org (result 127.0.0.3 = spam source)
1rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
1rhsbl.sorbs.net (union of all results)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 15 December 2003.