Blacklists Compared

7 February 2004

[ 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
25311(total number of IP addresses tested, including 519 at SDSC)
18334(union of most IP zones)
11828t1.dnsbl.net.au
10826dnsbl.sorbs.net (union of all results)
10662block.blars.org
9624blackholes.five-ten-sg.com (union of all results)
8378blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
8006sbl-xbl.spamhaus.org (union of all results)
7707unconfirmed.dsbl.org
7433dsbl.dnsbl.net.au
7433list.dsbl.org
7119dnsbl.sorbs.net (result 127.0.0.10 = dialup)
7016dynablock.njabl.org
6974cbl.abuseat.org
6953xbl.spamhaus.org
6953sbl-xbl.spamhaus.org (result 127.0.0.4 = Spamhaus XBL)
5152dnsbl.njabl.org (union of all results)
4863no-more-funn.moensted.dk (union of all results)
3999sbl.csma.biz
3675bl.spamcop.net
3401cn-kr.blackholes.us (union of all results)
3157dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2915l2.spews.dnsbl.sorbs.net
2750ipwhois.rfc-ignorant.org
2473l1.spews.dnsbl.sorbs.net
2473spews.dnsbl.net.au
2437no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2351dnsbl.ahbl.org (union of all results)
2287spam.wytnij.to
2202unsure.nether.net
2137dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1978dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1896dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1814psbl.surriel.com
1799no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1760cn-kr.blackholes.us (result 127.0.0.2 = China)
1760china.blackholes.us
1759bl.csma.biz
1641cn-kr.blackholes.us (result 127.0.0.3 = Korea)
1641korea.blackholes.us
1626korea.services.net
1265sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1265sbl.spamhaus.org
1261dnsbl.njabl.org (result 127.0.0.3 = dialup)
1046spamsources.fabel.dk
1001rmst.dnsbl.net.au
898blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
888comcast.blackholes.us
818wpbl.dnsbl.net.au
738ybl.megacity.org
674opm.blitzed.org
661ricn.dnsbl.net.au
659dnsbl.sorbs.net (result 127.0.0.6 = spam source)
574spamguard.leadmon.net (union of all results)
559spamguard.leadmon.net (result 127.0.0.2 = dialup)
550cw.blackholes.us
532relays.visi.com
515blacklist.spambag.org
500brazil.blackholes.us
476probes.dnsbl.net.au
440blackholes.intersil.net
438dnsbl.njabl.org (result 127.0.0.4 = spam source)
432level3.blackholes.us
422rr.blackholes.us
422pss.spambusters.org.ar
408hil.habeas.com
397work.drbl.croco.net
371dnsbl.ahbl.org (result 127.0.0.4 = spam source)
326japan.blackholes.us
312dnsbl.njabl.org (result 127.0.0.2 = source or relay)
304no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
295taiwan.blackholes.us
271wanadoo-fr.blackholes.us
270no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
252multihop.dsbl.org
241bellsouth.blackholes.us
234blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
225charter.blackholes.us
217qwest.blackholes.us
194relays.ordb.org
1853y.spam.mrs.kithrup.com
182verio.blackholes.us
167dialup.blacklist.jippg.org (union of all results)
165dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
157mexico.blackholes.us
151dnsbl.antispam.or.id
147mail-abuse.blacklist.jippg.org
134osrs.dnsbl.net.au
129interbusiness.blackholes.us
123infolink.blackholes.us
120hongkong.blackholes.us
119internap.blackholes.us
118dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
110xo.blackholes.us
109russia.blackholes.us
106relaywatcher.n13mbl.com
102relays.nether.net
99argentina.blackholes.us
96dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
94query.bondedsender.org (not a blacklist!)
90dnsbl.sorbs.net (result 127.0.0.5 = open relay)
87dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
83sbbl.they.com
80dun.dnsrbl.net
79singapore.blackholes.us
78flowgoaway.com
73he.blackholes.us
73above.blackholes.us
70ohps.dnsbl.net.au
69no-more-funn.moensted.dk (result 127.0.0.9 = misc)
67telstra.blackholes.us
66turkey.blackholes.us
66tr.countries.nerd.dk
64osps.dnsbl.net.au
63a2000.blackholes.us
55blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
52inflow.blackholes.us
49ph.rbl.cluecentral.net
48rogers.blackholes.us
48malaysia.blackholes.us
46covad.blackholes.us
45spam.exsilia.net (union of all results)
41blackholes.uceb.org (union of all results)
39swbell.blackholes.us
39exemptions.ahbl.org (not a blacklist!)
37nigeria.blackholes.us
34rdts.dnsbl.net.au
34spam.exsilia.net (result 127.0.0.2 = spam source)
33blackholes.brainerd.net
31cybercon.blackholes.us
29yipes.blackholes.us
28relays.bl.kundenserver.de
27rackspace.blackholes.us
26thailand.blackholes.us
26blackholes.uceb.org (result 127.0.0.2 = open relay)
23blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
23satos.rbl.cluecentral.net
19eli.blackholes.us
18affinity.blackholes.us
17broadwing.blackholes.us
16spamsources.yamta.org (result 127.0.0.2 = spam source)
15no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
14pajo.blackholes.us
14maxim.blackholes.us
14epoch.blackholes.us
14burst.blackholes.us
14bl.deadbeef.com
13blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
12blackholes.uceb.org (result 127.0.0.3 = spam source)
11blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
11blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
11spam.exsilia.net (result 127.0.0.3 = virus source)
10spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
9no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
7olm.blackholes.us
5spamguard.leadmon.net (result 127.0.0.3 = spam source)
4owps.dnsbl.net.au
4omrs.dnsbl.net.au
3navisite.blackholes.us
3dev.null.dk
3dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
2ciberlynx.blackholes.us
2blackholes.uceb.org (result 127.0.0.4 = spam source network)
2owfs.dnsbl.net.au
2dialup.blacklist.jippg.org (result 127.0.0.4 = dialup in Japan)
2spam.dnsrbl.net
1blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
1spamsites.dnsbl.net.au
1no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
1dnsbl.ahbl.org (result 127.0.0.15 = open relay)
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
25311(total number of IP addresses whose names were tested, including 519 at SDSC)
11595(union of all domain zones)
7501abuse.rfc-ignorant.org
6335rddn.dnsbl.net.au
2846whois.rfc-ignorant.org (union of all results)
1730whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
1116whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
579bulk.rhs.mailpolice.com
412blackhole.securitysage.com
301rhsbl.ahbl.org
206bl.deadbeef.com
52porn.rhs.mailpolice.com
24postmaster.rfc-ignorant.org
24dsn.rfc-ignorant.org (zone not intended for this use)
12bogusmx.rfc-ignorant.org
1cart00ney.surriel.com

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

HitsDNS Zone
25114(total number of domains tested, including 402 at SDSC)
6853(union of all domain zones)
2893whois.rfc-ignorant.org (union of all results)
2471whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2137abuse.rfc-ignorant.org
1258bulk.rhs.mailpolice.com
931postmaster.rfc-ignorant.org
832dsn.rfc-ignorant.org
646blackhole.securitysage.com
527rhsbl.ahbl.org
422whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
232bogusmx.rfc-ignorant.org
166porn.rhs.mailpolice.com
124bl.deadbeef.com
58rddn.dnsbl.net.au (zone not intended for this use)
17rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
17rhsbl.sorbs.net (union of all results)
3cart00ney.surriel.com
2rhsbl.sorbs.net (result 127.0.0.12 = domain does not send mail)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 23 February 2004.