Blacklists Compared

13 May 2006

[ 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
81491(total number of IP addresses tested, including 499 at SDSC)
72132(union of most IP zones)
52626block.blars.org
43329dnsbl.sorbs.net (union of all results)
39507t1.dnsbl.net.au
34890dnsbl.sorbs.net (result 127.0.0.10 = dialup)
33229sbl-xbl.spamhaus.org (union of all results)
31676xbl.spamhaus.org (union of all results)
30696cbl.abuseat.org
30665xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
30665sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
26841dynablock.njabl.org
22586blackholes.five-ten-sg.com (union of all results)
21788blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
19025cn-kr.blackholes.us (result 127.0.0.2 = China)
19025cn-kr.blackholes.us (union of all results)
18733psbl.surriel.com
15755no-more-funn.moensted.dk (union of all results)
14357china.blackholes.us
13896sbl.csma.biz
11717unconfirmed.dsbl.org
11602list.dsbl.org
11593dsbl.dnsbl.net.au
10587dnsbl-1.uceprotect.net
10267bl.spamcop.net
9452dnsbl-2.uceprotect.net
9370blacklist.spambag.org
7576dnsbl.sorbs.net (result 127.0.0.6 = spam source)
6799bl.csma.biz
5858no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
5416no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
5090wpbl.dnsbl.net.au
4814l2.spews.dnsbl.sorbs.net
4795korea.services.net
4666korea.blackholes.us
4478dnsbl.njabl.org (union of all results)
4066l1.spews.dnsbl.sorbs.net
3955no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
3905rmst.dnsbl.net.au
3464spews.dnsbl.net.au
3165spamsources.fabel.dk
3083dnsbl.njabl.org (result 127.0.0.9 = open proxy)
3069unsure.nether.net
2905dnsbl.ahbl.org (union of all results)
2898dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
2468brazil.blackholes.us
2463dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2451ricn.dnsbl.net.au
2131sbl.spamhaus.org
2123sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1922xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1922sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1800turkey.blackholes.us
1646spam.wytnij.to
1527tr.countries.nerd.dk
1456mail-abuse.blacklist.jippg.org
1399japan.blackholes.us
1210dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1198taiwan.blackholes.us
1177dnsbl.njabl.org (result 127.0.0.3 = dialup)
1154bl.spamcannibal.org
1051dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
945probes.dnsbl.net.au
872russia.blackholes.us
794dnsbl-3.uceprotect.net
738argentina.blackholes.us
714mexico.blackholes.us
645dnsbl.antispam.or.id
419dnsbl.ahbl.org (result 127.0.0.4 = spam source)
390malaysia.blackholes.us
364blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
297thailand.blackholes.us
297no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
282hongkong.blackholes.us
247opm.blitzed.org
231no-more-funn.moensted.dk (result 127.0.0.9 = misc)
211blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
189singapore.blackholes.us
186blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
160query.bondedsender.org (not a blacklist!)
157dnsbl.njabl.org (result 127.0.0.4 = spam source)
143blackholes.intersil.net
127work.drbl.croco.net
107dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
92multihop.dsbl.org
83flowgoaway.com
78relays.ordb.org
76ohps.dnsbl.net.au
75dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
71dnsbl.njabl.org (result 127.0.0.2 = open relay)
30blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
20rdts.dnsbl.net.au
19relays.nether.net
19tor.dnsbl.sectoor.de (union of all results)
18nigeria.blackholes.us
18tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
18osps.dnsbl.net.au
15dnsbl.ahbl.org (result 127.0.0.15 = open relay)
15dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
13exemptions.ahbl.org (not a blacklist!)
13blackholes.uceb.org (union of all results)
11hil.habeas.com
10dnsbl.sorbs.net (result 127.0.0.5 = open relay)
9spamguard.leadmon.net (union of all results)
8vox.schpider.com
8osrs.dnsbl.net.au
8combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
8combined-hib.dnsiplists.completewhois.com (union of all results)
6owps.dnsbl.net.au
5spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
5bl.deadbeef.com
4blackholes.uceb.org (result 127.0.0.3 = spam source)
4blackholes.uceb.org (result 127.0.0.2 = open relay)
4blackholes.uceb.org (result 127.0.0.5 = dialup)
4blackholes.brainerd.net
3blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
3dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2spamguard.leadmon.net (result 127.0.0.8 = open proxy)
2blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
1blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)

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
81491(total number of IP addresses whose names were tested, including 499 at SDSC)
44309(union of all domain zones)
32690abuse.rfc-ignorant.org
29683rddn.dnsbl.net.au
22840dynamic.rhs.mailpolice.com
21588whois.rfc-ignorant.org (union of all results)
16821whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
4769whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2798webmail.rhs.mailpolice.com
596rhsbl.ahbl.org
503adv.rhs.mailpolice.com
492bl.deadbeef.com
279postmaster.rfc-ignorant.org
120bogusmx.rfc-ignorant.org
116dsn.rfc-ignorant.org (zone not intended for this use)
83bulk.rhs.mailpolice.com
2blackhole.securitysage.com
2porn.rhs.mailpolice.com

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

HitsDNS Zone
56948(total number of domains tested, including 414 at SDSC)
11108(union of all domain zones)
5727whois.rfc-ignorant.org (union of all results)
5168whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3516abuse.rfc-ignorant.org
1689webmail.rhs.mailpolice.com
1181postmaster.rfc-ignorant.org
832dsn.rfc-ignorant.org
808bogusmx.rfc-ignorant.org
747rhsbl.ahbl.org
559whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
291porn.rhs.mailpolice.com
175adv.rhs.mailpolice.com
126bulk.rhs.mailpolice.com
122blackhole.securitysage.com
38rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
38rhsbl.sorbs.net (union of all results)
28rddn.dnsbl.net.au (zone not intended for this use)
19ex.dnsbl.org
18dynamic.rhs.mailpolice.com
2fraud.rhs.mailpolice.com
1cart00ney.surriel.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 3 June 2006.