Blacklists Compared

15 November 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
15839(total number of IP addresses tested, including 383 at SDSC)
12022(union of most IP zones)
8344t1.dnsbl.net.au
6161block.blars.org
5919blackholes.five-ten-sg.com (union of all results)
4847blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
4838unconfirmed.dsbl.org
4620list.dsbl.org
4619dsbl.dnsbl.net.au
4251dynablock.easynet.nl (result 127.0.0.2 = dialup)
4251dynablock.easynet.nl (union of all results)
4250wdl.dnsbl.net.au
4249cbl.abuseat.org
4178dnsbl.sorbs.net (union of all results)
3917blackholes.easynet.nl
3915wpb.dnsbl.net.au
3569no-more-funn.moensted.dk (union of all results)
3560dnsbl.njabl.org (union of all results)
2715proxies.blackholes.easynet.nl
2690bl.spamcop.net
2581sbl.csma.biz
2367cn-kr.blackholes.us (union of all results)
2332dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1795dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1772no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1758dnsbl.ahbl.org (union of all results)
1717unsure.nether.net
1675ipwhois.rfc-ignorant.org
1553cn-kr.blackholes.us (result 127.0.0.2 = China)
1553china.blackholes.us
1515psbl.surriel.com
1464dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1452l2.spews.dnsbl.sorbs.net
1365dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1315no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1209spam.wytnij.to
1134spews.dnsbl.net.au
1125l1.spews.dnsbl.sorbs.net
1050bl.csma.biz
1005pss.spambusters.org.ar
994sbl.spamhaus.org
818spamsources.fabel.dk
814cn-kr.blackholes.us (result 127.0.0.3 = Korea)
814korea.blackholes.us
806korea.services.net
762blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
671rmst.dnsbl.net.au
610dnsbl.sorbs.net (result 127.0.0.10 = dialup)
606ybl.megacity.org
601dnsbl.njabl.org (result 127.0.0.3 = dialup)
597probes.dnsbl.net.au
537ricn.dnsbl.net.au
462cw.blackholes.us
458dnsbl.sorbs.net (result 127.0.0.6 = spam source)
411opm.blitzed.org
410work.drbl.croco.net
405blacklist.spambag.org
391dnsbl.ahbl.org (result 127.0.0.4 = spam source)
369dnsbl.njabl.org (result 127.0.0.4 = spam source)
364brazil.blackholes.us
351spamguard.leadmon.net (union of all results)
348rr.blackholes.us
347comcast.blackholes.us
340relaywatcher.n13mbl.com
338spamguard.leadmon.net (result 127.0.0.2 = dialup)
332blackholes.intersil.net
307sbbl.they.com
306level3.blackholes.us
281dnsbl.njabl.org (result 127.0.0.2 = source or relay)
263taiwan.blackholes.us
247relays.visi.com
246no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
243blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
204dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
196dnsbl.antispam.or.id
193multihop.dsbl.org
176japan.blackholes.us
172relays.ordb.org
163no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
159charter.blackholes.us
143qwest.blackholes.us
128verio.blackholes.us
125xo.blackholes.us
118mexico.blackholes.us
118relays.nether.net
112internap.blackholes.us
110mail-abuse.blacklist.jippg.org
109osps.dnsbl.net.au
106russia.blackholes.us
106osrs.dnsbl.net.au
102dun.dnsrbl.net
97query.bondedsender.org (not a blacklist!)
91ohps.dnsbl.net.au
90dialup.blacklist.jippg.org (union of all results)
89dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
86flowgoaway.com
75argentina.blackholes.us
753y.spam.mrs.kithrup.com
74blackholes.brainerd.net
71no-more-funn.moensted.dk (result 127.0.0.9 = misc)
69interbusiness.blackholes.us
65relays.bl.kundenserver.de
62he.blackholes.us
61hongkong.blackholes.us
57turkey.blackholes.us
57tr.countries.nerd.dk
52blackholes.uceb.org (union of all results)
50wanadoo-fr.blackholes.us
47nigeria.blackholes.us
46rdts.dnsbl.net.au
45bellsouth.blackholes.us
41rogers.blackholes.us
39above.blackholes.us
37inflow.blackholes.us
31covad.blackholes.us
30dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
29singapore.blackholes.us
29spam.exsilia.net (union of all results)
28telstra.blackholes.us
28satos.rbl.cluecentral.net
27cybercon.blackholes.us
27spam.exsilia.net (result 127.0.0.2 = spam source)
26rackspace.blackholes.us
26a2000.blackholes.us
25no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
23blackholes.uceb.org (result 127.0.0.3 = spam source)
23blackholes.uceb.org (result 127.0.0.2 = open relay)
21vox.schpider.com
21ph.rbl.cluecentral.net
20yipes.blackholes.us
20blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
20blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
16malaysia.blackholes.us
16eli.blackholes.us
15thailand.blackholes.us
14broadwing.blackholes.us
13dnsbl.sorbs.net (result 127.0.0.5 = open relay)
13spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
13blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
12burst.blackholes.us
12bl.deadbeef.com
11t3direct.dnsbl.net.au
10olm.blackholes.us
10affinity.blackholes.us
9pajo.blackholes.us
8maxim.blackholes.us
8owps.dnsbl.net.au
8no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
8blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
7dev.null.dk
6spamsources.yamta.org (result 127.0.0.2 = spam source)
6infolink.blackholes.us
6epoch.blackholes.us
4blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
3blackholes.uceb.org (result 127.0.0.4 = spam source network)
3blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
2valuenet.blackholes.us
2ciberlynx.blackholes.us
2omrs.dnsbl.net.au
2spam.exsilia.net (result 127.0.0.3 = virus source)
2dnsbl.ahbl.org (result 127.0.0.2 = open relay)
1navisite.blackholes.us
1dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
1dialup.blacklist.jippg.org (result 127.0.0.4 = dialup in Japan)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
1exemptions.ahbl.org (not a blacklist!)

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
15839(total number of IP addresses whose names were tested, including 383 at SDSC)
6921(union of all domain zones)
4400abuse.rfc-ignorant.org
2994rddn.dnsbl.net.au
1187whois.rfc-ignorant.org (union of all results)
713endn.dnsbl.net.au
685bulk.rhs.mailpolice.com
671spamdomains.blackholes.easynet.nl
621blackhole.securitysage.com
608whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
579whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
171rhsbl.ahbl.org
135bl.deadbeef.com
112porn.rhs.mailpolice.com
13postmaster.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
8740(total number of domains tested, including 237 at SDSC)
3179(union of all domain zones)
1161bulk.rhs.mailpolice.com
875abuse.rfc-ignorant.org
869endn.dnsbl.net.au
819whois.rfc-ignorant.org (union of all results)
799spamdomains.blackholes.easynet.nl
689whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
667blackhole.securitysage.com
415postmaster.rfc-ignorant.org
389dsn.rfc-ignorant.org
130whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
103rhsbl.ahbl.org
57bl.deadbeef.com
55porn.rhs.mailpolice.com
40rddn.dnsbl.net.au (zone not intended for this use)
30ex.dnsbl.org (union of all results)
28ex.dnsbl.org (result 127.0.0.2 = spamsites)
3rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
3rhsbl.sorbs.net (union of all results)
2ex.dnsbl.org (result 127.0.0.3 = spam source)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 23 November 2003.