Blacklists Compared

27 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
15775(total number of IP addresses tested, including 302 at SDSC)
12805(union of most IP zones)
9020t1.dnsbl.net.au
8313dnsbl.sorbs.net (union of all results)
6989block.blars.org
6821blackholes.five-ten-sg.com (union of all results)
6006blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
5859unconfirmed.dsbl.org
5744dsbl.dnsbl.net.au
5744list.dsbl.org
5686dnsbl.sorbs.net (result 127.0.0.10 = dialup)
4857cbl.abuseat.org
3917dnsbl.njabl.org (union of all results)
3779bl.spamcop.net
3700no-more-funn.moensted.dk (union of all results)
3341sbl.csma.biz
2349cn-kr.blackholes.us (union of all results)
1999dnsbl.ahbl.org (union of all results)
1996dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1851bl.csma.biz
1840unsure.nether.net
1786no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1744dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1649l2.spews.dnsbl.sorbs.net
1579dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1542no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1379cn-kr.blackholes.us (result 127.0.0.2 = China)
1379china.blackholes.us
1378l1.spews.dnsbl.sorbs.net
1373spews.dnsbl.net.au
1342spam.wytnij.to
1326dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1275ipwhois.rfc-ignorant.org
1180sbl.spamhaus.org
1105dnsbl.njabl.org (result 127.0.0.3 = dialup)
970cn-kr.blackholes.us (result 127.0.0.3 = Korea)
970korea.blackholes.us
960korea.services.net
937psbl.surriel.com
784spamsources.fabel.dk
669probes.dnsbl.net.au
644relays.visi.com
630dnsbl.njabl.org (result 127.0.0.4 = spam source)
606pss.spambusters.org.ar
605rmst.dnsbl.net.au
584dnsbl.sorbs.net (result 127.0.0.6 = spam source)
570ybl.megacity.org
570blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
427blacklist.spambag.org
421work.drbl.croco.net
421dnsbl.ahbl.org (result 127.0.0.4 = spam source)
418spamguard.leadmon.net (union of all results)
414comcast.blackholes.us
408spamguard.leadmon.net (result 127.0.0.2 = dialup)
402opm.blitzed.org
369blackholes.intersil.net
341cw.blackholes.us
315relaywatcher.n13mbl.com
280rr.blackholes.us
273brazil.blackholes.us
261level3.blackholes.us
242ricn.dnsbl.net.au
215taiwan.blackholes.us
206dnsbl.njabl.org (result 127.0.0.2 = source or relay)
194dialup.blacklist.jippg.org (union of all results)
193dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
190charter.blackholes.us
185no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
183no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
182blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
163dnsbl.antispam.or.id
162relays.ordb.org
151japan.blackholes.us
138mail-abuse.blacklist.jippg.org
126dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
117wanadoo-fr.blackholes.us
115xo.blackholes.us
115sbbl.they.com
114qwest.blackholes.us
1133y.spam.mrs.kithrup.com
110russia.blackholes.us
96multihop.dsbl.org
90verio.blackholes.us
86argentina.blackholes.us
86query.bondedsender.org (not a blacklist!)
85mexico.blackholes.us
85internap.blackholes.us
85osps.dnsbl.net.au
84rogers.blackholes.us
82flowgoaway.com
79singapore.blackholes.us
73tr.countries.nerd.dk
72turkey.blackholes.us
72interbusiness.blackholes.us
72ohps.dnsbl.net.au
65dun.dnsrbl.net
64dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
57hongkong.blackholes.us
55rdts.dnsbl.net.au
53relays.nether.net
50osrs.dnsbl.net.au
44above.blackholes.us
42bellsouth.blackholes.us
41blackholes.uceb.org (union of all results)
40relays.bl.kundenserver.de
40spam.exsilia.net (union of all results)
38inflow.blackholes.us
36blackholes.brainerd.net
34yipes.blackholes.us
34dnsbl.sorbs.net (result 127.0.0.5 = open relay)
30a2000.blackholes.us
30blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
29infolink.blackholes.us
27he.blackholes.us
26cybercon.blackholes.us
25spam.exsilia.net (result 127.0.0.2 = spam source)
25exemptions.ahbl.org (not a blacklist!)
23no-more-funn.moensted.dk (result 127.0.0.9 = misc)
21telstra.blackholes.us
21blackholes.uceb.org (result 127.0.0.3 = spam source)
21no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
20rackspace.blackholes.us
20malaysia.blackholes.us
20covad.blackholes.us
20blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
19nigeria.blackholes.us
19broadwing.blackholes.us
18ph.rbl.cluecentral.net
17satos.rbl.cluecentral.net
16blackholes.uceb.org (result 127.0.0.2 = open relay)
15spam.exsilia.net (result 127.0.0.3 = virus source)
14thailand.blackholes.us
10burst.blackholes.us
10spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
9eli.blackholes.us
9owps.dnsbl.net.au
9blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
8pajo.blackholes.us
6olm.blackholes.us
6bl.deadbeef.com
5affinity.blackholes.us
4spamsources.yamta.org (result 127.0.0.2 = spam source)
4maxim.blackholes.us
4epoch.blackholes.us
4t3direct.dnsbl.net.au
3dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
2blackholes.uceb.org (result 127.0.0.4 = spam source network)
2blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
2dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
2dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
2blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1navisite.blackholes.us
1omrs.dnsbl.net.au
1dialup.blacklist.jippg.org (result 127.0.0.4 = dialup in Japan)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
1blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
1dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)

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
15775(total number of IP addresses whose names were tested, including 302 at SDSC)
8102(union of all domain zones)
5978abuse.rfc-ignorant.org
4385rddn.dnsbl.net.au
1027whois.rfc-ignorant.org (union of all results)
919blackhole.securitysage.com
557whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
545bulk.rhs.mailpolice.com
470whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
165rhsbl.ahbl.org
158bl.deadbeef.com
57porn.rhs.mailpolice.com
13postmaster.rfc-ignorant.org
11dsn.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
9475(total number of domains tested, including 182 at SDSC)
3896(union of all domain zones)
1524bulk.rhs.mailpolice.com
1132whois.rfc-ignorant.org (union of all results)
986whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
933abuse.rfc-ignorant.org
546blackhole.securitysage.com
480postmaster.rfc-ignorant.org
477dsn.rfc-ignorant.org
284rhsbl.ahbl.org
146whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
68bl.deadbeef.com
64porn.rhs.mailpolice.com
34ex.dnsbl.org (union of all results)
31ex.dnsbl.org (result 127.0.0.2 = spamsites)
17rddn.dnsbl.net.au (zone not intended for this use)
3ex.dnsbl.org (result 127.0.0.3 = spam source)
2rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
2rhsbl.sorbs.net (union of all results)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 3 January 2004.