Blacklists Compared

10 June 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
89974(total number of IP addresses tested, including 513 at SDSC)
80634(union of most IP zones)
58391block.blars.org
47938dnsbl.sorbs.net (union of all results)
41773t1.dnsbl.net.au
37452dnsbl.sorbs.net (result 127.0.0.10 = dialup)
37450blackholes.five-ten-sg.com (union of all results)
36532blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
34598sbl-xbl.spamhaus.org (union of all results)
33532xbl.spamhaus.org (union of all results)
31079cbl.abuseat.org
31077sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
31062xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
28698dynablock.njabl.org
25740cn-kr.blackholes.us (result 127.0.0.2 = China)
25740cn-kr.blackholes.us (union of all results)
18946china.blackholes.us
17826sbl.csma.biz
16562no-more-funn.moensted.dk (union of all results)
16400psbl.surriel.com
13621unconfirmed.dsbl.org
13493list.dsbl.org
13487dsbl.dnsbl.net.au
11982dnsbl-1.uceprotect.net
11934dnsbl-2.uceprotect.net
11589bl.spamcop.net
10601blacklist.spambag.org
9123combined-hib.dnsiplists.completewhois.com (union of all results)
9121combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
8831bl.csma.biz
8262dnsbl.sorbs.net (result 127.0.0.6 = spam source)
7317dnsbl.njabl.org (union of all results)
6968no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
6795korea.blackholes.us
6652wpbl.dnsbl.net.au
5957dnsbl.njabl.org (result 127.0.0.9 = open proxy)
5540no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
5324korea.services.net
4677dnsbl.ahbl.org (union of all results)
4602xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
4602sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
4472l2.spews.dnsbl.sorbs.net
4262dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
3989spamsources.fabel.dk
3901unsure.nether.net
3538no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
3502rmst.dnsbl.net.au
3426l1.spews.dnsbl.sorbs.net
3136dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
2962brazil.blackholes.us
2920dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
2449ricn.dnsbl.net.au
1827dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1764mail-abuse.blacklist.jippg.org
1650tr.countries.nerd.dk
1645turkey.blackholes.us
1597japan.blackholes.us
1595taiwan.blackholes.us
1455sbl.spamhaus.org
1453sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1214bl.spamcannibal.org
1140dnsbl-3.uceprotect.net
1099dnsbl.njabl.org (result 127.0.0.3 = dialup)
1030russia.blackholes.us
892mexico.blackholes.us
838argentina.blackholes.us
815probes.dnsbl.net.au
724spews.dnsbl.net.au
584blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
411hongkong.blackholes.us
390dnsbl.ahbl.org (result 127.0.0.4 = spam source)
377malaysia.blackholes.us
321thailand.blackholes.us
294dnsbl.antispam.or.id
265no-more-funn.moensted.dk (result 127.0.0.9 = misc)
253no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
212singapore.blackholes.us
192ohps.dnsbl.net.au
157dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
152blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
152query.bondedsender.org (not a blacklist!)
151dnsbl.njabl.org (result 127.0.0.4 = spam source)
141work.drbl.croco.net
128dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
125blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
121dnsbl.njabl.org (result 127.0.0.2 = open relay)
105spam.wytnij.to
94blackholes.intersil.net
89multihop.dsbl.org
86flowgoaway.com
83relays.ordb.org
46blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
27osps.dnsbl.net.au
23rdts.dnsbl.net.au
21dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
20blackholes.uceb.org (union of all results)
18dnsbl.ahbl.org (result 127.0.0.15 = open relay)
17tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
17tor.dnsbl.sectoor.de (union of all results)
16dnsbl.sorbs.net (result 127.0.0.5 = open relay)
15relays.nether.net
14hil.habeas.com
13spamguard.leadmon.net (union of all results)
12exemptions.ahbl.org (not a blacklist!)
10nigeria.blackholes.us
9blackholes.uceb.org (result 127.0.0.3 = spam source)
9spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
8owps.dnsbl.net.au
8osrs.dnsbl.net.au
6blackholes.uceb.org (result 127.0.0.2 = open relay)
5blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
5blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
5blackholes.brainerd.net
5dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
4blackholes.uceb.org (result 127.0.0.5 = dialup)
3spamguard.leadmon.net (result 127.0.0.8 = open proxy)
2bl.deadbeef.com
2combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
1blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
1omrs.dnsbl.net.au
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1blackholes.five-ten-sg.com (result 127.0.0.13 = challenge-response 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
89974(total number of IP addresses whose names were tested, including 513 at SDSC)
45286(union of all domain zones)
35059abuse.rfc-ignorant.org
30086rddn.dnsbl.net.au
23612dynamic.rhs.mailpolice.com
22421whois.rfc-ignorant.org (union of all results)
17267whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
5155whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3082webmail.rhs.mailpolice.com
547rhsbl.ahbl.org
485adv.rhs.mailpolice.com
281postmaster.rfc-ignorant.org
119dsn.rfc-ignorant.org (zone not intended for this use)
116bogusmx.rfc-ignorant.org
80bulk.rhs.mailpolice.com
5porn.rhs.mailpolice.com

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

HitsDNS Zone
50636(total number of domains tested, including 444 at SDSC)
10003(union of all domain zones)
3884whois.rfc-ignorant.org (union of all results)
3423abuse.rfc-ignorant.org
3229whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1590rhsbl.ahbl.org
1525webmail.rhs.mailpolice.com
1341postmaster.rfc-ignorant.org
953dsn.rfc-ignorant.org
775bogusmx.rfc-ignorant.org
655whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
293porn.rhs.mailpolice.com
197bulk.rhs.mailpolice.com
197adv.rhs.mailpolice.com
179blackhole.securitysage.com
51rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
51rhsbl.sorbs.net (union of all results)
40rddn.dnsbl.net.au (zone not intended for this use)
26dynamic.rhs.mailpolice.com
17ex.dnsbl.org
2cart00ney.surriel.com
1fraud.rhs.mailpolice.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 26 June 2006.