Blacklists Compared

1 April 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
83721(total number of IP addresses tested, including 492 at SDSC)
75732(union of most IP zones)
53505block.blars.org
47444dnsbl.sorbs.net (union of all results)
43852t1.dnsbl.net.au
38805dnsbl.sorbs.net (result 127.0.0.10 = dialup)
37928sbl-xbl.spamhaus.org (union of all results)
35738xbl.spamhaus.org (union of all results)
34111cbl.abuseat.org
34107xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
34105sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
29310dynablock.njabl.org
28147psbl.surriel.com
26177blackholes.five-ten-sg.com (union of all results)
25361blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
18438no-more-funn.moensted.dk (union of all results)
17631cn-kr.blackholes.us (result 127.0.0.2 = China)
17631cn-kr.blackholes.us (union of all results)
13963sbl.csma.biz
13718china.blackholes.us
12461unconfirmed.dsbl.org
12354list.dsbl.org
12346dsbl.dnsbl.net.au
11356blacklist.spambag.org
11073dnsbl-1.uceprotect.net
10578bl.spamcop.net
7995no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
7676unsure.nether.net
7499dnsbl.sorbs.net (result 127.0.0.6 = spam source)
7215l2.spews.dnsbl.sorbs.net
7150combined-hib.dnsiplists.completewhois.com (union of all results)
7104combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
6559dnsbl-2.uceprotect.net
6408l1.spews.dnsbl.sorbs.net
6408spews.dnsbl.net.au
6054wpbl.dnsbl.net.au
5687bl.csma.biz
4887no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
4849no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
4486dnsbl.njabl.org (union of all results)
4426dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
3974korea.services.net
3913korea.blackholes.us
3762rmst.dnsbl.net.au
3087dnsbl.ahbl.org (union of all results)
3010spamsources.fabel.dk
2955dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2783ricn.dnsbl.net.au
2770sbl.spamhaus.org
2761sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
2376dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2134brazil.blackholes.us
1919xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1919sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1834xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1834sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1834opm.blitzed.org
1766mail-abuse.blacklist.jippg.org
1661dnsbl-3.uceprotect.net
1623spam.wytnij.to
1598russia.blackholes.us
1392japan.blackholes.us
1231probes.dnsbl.net.au
1223dnsbl.njabl.org (result 127.0.0.3 = dialup)
1198taiwan.blackholes.us
1046dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1039tr.countries.nerd.dk
1033turkey.blackholes.us
1011bl.spamcannibal.org
929dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
819mexico.blackholes.us
680dnsbl.ahbl.org (result 127.0.0.4 = spam source)
587argentina.blackholes.us
474blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
435dnsbl.antispam.or.id
430no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
409hongkong.blackholes.us
401malaysia.blackholes.us
284singapore.blackholes.us
281no-more-funn.moensted.dk (result 127.0.0.9 = misc)
279thailand.blackholes.us
197dnsbl.njabl.org (result 127.0.0.2 = open relay)
195blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
176relays.ordb.org
144blackholes.intersil.net
122dnsbl.njabl.org (result 127.0.0.4 = spam source)
120query.bondedsender.org (not a blacklist!)
117blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
89multihop.dsbl.org
87ohps.dnsbl.net.au
71flowgoaway.com
62dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
54dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
46combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
38osps.dnsbl.net.au
23blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
22dnsbl.ahbl.org (result 127.0.0.15 = open relay)
21dnsbl.sorbs.net (result 127.0.0.5 = open relay)
20tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
20blackholes.uceb.org (union of all results)
20tor.dnsbl.sectoor.de (union of all results)
19relays.nether.net
17exemptions.ahbl.org (not a blacklist!)
12osrs.dnsbl.net.au
9blackholes.uceb.org (result 127.0.0.6 = spam haven)
9hil.habeas.com
8dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
7nigeria.blackholes.us
7blackholes.uceb.org (result 127.0.0.3 = spam source)
7dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
7spamguard.leadmon.net (union of all results)
5spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
5blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
4rdts.dnsbl.net.au
4bl.deadbeef.com
3blackholes.uceb.org (result 127.0.0.2 = open relay)
3owps.dnsbl.net.au
3blackholes.brainerd.net
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
1blackholes.uceb.org (result 127.0.0.5 = dialup)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
1dnsbl.ahbl.org (result 127.0.0.18 = virus source)

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
83721(total number of IP addresses whose names were tested, including 492 at SDSC)
47696(union of all domain zones)
32572rddn.dnsbl.net.au
31840abuse.rfc-ignorant.org
23524dynamic.rhs.mailpolice.com
22735whois.rfc-ignorant.org (union of all results)
18883whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
3852whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2555webmail.rhs.mailpolice.com
1011rhsbl.ahbl.org
679bl.deadbeef.com
520adv.rhs.mailpolice.com
314postmaster.rfc-ignorant.org
215bulk.rhs.mailpolice.com
136bogusmx.rfc-ignorant.org
130dsn.rfc-ignorant.org (zone not intended for this use)
3blackhole.securitysage.com
3porn.rhs.mailpolice.com

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

HitsDNS Zone
37896(total number of domains tested, including 404 at SDSC)
6824(union of all domain zones)
2640whois.rfc-ignorant.org (union of all results)
2162whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2156abuse.rfc-ignorant.org
1086postmaster.rfc-ignorant.org
879webmail.rhs.mailpolice.com
835rhsbl.ahbl.org
825bogusmx.rfc-ignorant.org
818dsn.rfc-ignorant.org
478whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
220adv.rhs.mailpolice.com
143bulk.rhs.mailpolice.com
135bl.deadbeef.com
117porn.rhs.mailpolice.com
112blackhole.securitysage.com
39rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
39rhsbl.sorbs.net (union of all results)
31rddn.dnsbl.net.au (zone not intended for this use)
20dynamic.rhs.mailpolice.com
12ex.dnsbl.org
2cart00ney.surriel.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 20 April 2006.