Blacklists Compared

22 July 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
85490(total number of IP addresses tested, including 503 at SDSC)
77939(union of most IP zones)
55751block.blars.org
51896dnsbl.sorbs.net (union of all results)
42200t1.dnsbl.net.au
41284blackholes.five-ten-sg.com (union of all results)
40112blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
39318dnsbl.tqmcube.com (union of all results)
38417dnsbl.sorbs.net (result 127.0.0.10 = dialup)
31167sbl-xbl.spamhaus.org (union of all results)
29984xbl.spamhaus.org (union of all results)
27807dynablock.njabl.org
27483cbl.abuseat.org
27439sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
27427xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
27427psbl.surriel.com
20362cn-kr.blackholes.us (result 127.0.0.2 = China)
20362cn-kr.blackholes.us (union of all results)
14946china.blackholes.us
14690dnsbl.tqmcube.com (result 127.0.0.5 = China)
13943no-more-funn.moensted.dk (union of all results)
12632dnsbl.tqmcube.com (result 127.0.0.2 = dialup)
11899unconfirmed.dsbl.org
11795list.dsbl.org
11790dsbl.dnsbl.net.au
11634dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
11098blacklist.spambag.org
10238bl.csma.biz
9602bl.spamcop.net
9159dnsbl-1.uceprotect.net
8418dnsbl-2.uceprotect.net
8071wpbl.dnsbl.net.au
7643combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
7643combined-hib.dnsiplists.completewhois.com (union of all results)
7629dnsbl.tqmcube.com (result 127.0.0.3 = spam source)
7426dnsbl.sorbs.net (result 127.0.0.6 = spam source)
7226dnsbl.njabl.org (union of all results)
7092no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
5774dnsbl.njabl.org (result 127.0.0.9 = open proxy)
5590korea.services.net
5411korea.blackholes.us
4602dnsbl.tqmcube.com (result 127.0.0.4 = South Korea)
4558l2.spews.dnsbl.sorbs.net
4531xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
4531sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
4259unsure.nether.net
4191dnsbl.ahbl.org (union of all results)
3875dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
3666no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
3460rmst.dnsbl.net.au
3454l1.spews.dnsbl.sorbs.net
3274spamsources.fabel.dk
3214brazil.blackholes.us
3085no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
2780spam.wytnij.to
2636dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1863taiwan.blackholes.us
1785mail-abuse.blacklist.jippg.org
1696ricn.dnsbl.net.au
1655dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1441tr.countries.nerd.dk
1433turkey.blackholes.us
1402japan.blackholes.us
1357sbl.spamhaus.org
1355sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1323bl.spamcannibal.org
1156spews.dnsbl.net.au
1089dnsbl-3.uceprotect.net
1045dnsbl.njabl.org (result 127.0.0.3 = dialup)
989sbl.csma.biz
757argentina.blackholes.us
730blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
716mexico.blackholes.us
649probes.dnsbl.net.au
642russia.blackholes.us
407malaysia.blackholes.us
378thailand.blackholes.us
369hongkong.blackholes.us
299dnsbl.ahbl.org (result 127.0.0.4 = spam source)
271dnsbl.njabl.org (result 127.0.0.4 = spam source)
266no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
253singapore.blackholes.us
233blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
216no-more-funn.moensted.dk (result 127.0.0.9 = misc)
164blackholes.intersil.net
161ohps.dnsbl.net.au
155blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
149dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
145query.bondedsender.org (not a blacklist!)
143dnsbl.njabl.org (result 127.0.0.2 = open relay)
126work.drbl.croco.net
109dnsbl.antispam.or.id
106dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
88multihop.dsbl.org
83flowgoaway.com
68relays.ordb.org
47blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
36osps.dnsbl.net.au
24relays.nether.net
21tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
21tor.dnsbl.sectoor.de (union of all results)
18blackholes.uceb.org (union of all results)
17rdts.dnsbl.net.au
15nigeria.blackholes.us
14exemptions.ahbl.org (not a blacklist!)
13dnsbl.sorbs.net (result 127.0.0.5 = open relay)
12dnsbl.ahbl.org (result 127.0.0.15 = open relay)
11hil.habeas.com
10blackholes.uceb.org (result 127.0.0.3 = spam source)
9dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
6osrs.dnsbl.net.au
5owps.dnsbl.net.au
5spamguard.leadmon.net (union of all results)
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 127.0.0.10 = virus notices)
3bl.deadbeef.com
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2spamguard.leadmon.net (result 127.0.0.8 = open proxy)
2blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
2dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
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
85490(total number of IP addresses whose names were tested, including 503 at SDSC)
45445(union of all domain zones)
34257abuse.rfc-ignorant.org
33827rddn.dnsbl.net.au
23087dynamic.rhs.mailpolice.com
22455whois.rfc-ignorant.org (union of all results)
17428whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
5030whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3085webmail.rhs.mailpolice.com
504adv.rhs.mailpolice.com
500rhsbl.ahbl.org
330postmaster.rfc-ignorant.org
107bogusmx.rfc-ignorant.org
106dsn.rfc-ignorant.org (zone not intended for this use)
76bulk.rhs.mailpolice.com
3blackhole.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
49107(total number of domains tested, including 400 at SDSC)
9468(union of all domain zones)
3676whois.rfc-ignorant.org (union of all results)
3260abuse.rfc-ignorant.org
2981whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1459webmail.rhs.mailpolice.com
1385rhsbl.ahbl.org
1291postmaster.rfc-ignorant.org
972dsn.rfc-ignorant.org
732bogusmx.rfc-ignorant.org
695whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
278porn.rhs.mailpolice.com
205adv.rhs.mailpolice.com
202bulk.rhs.mailpolice.com
157blackhole.securitysage.com
52rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
52rhsbl.sorbs.net (union of all results)
37rddn.dnsbl.net.au (zone not intended for this use)
20ex.dnsbl.org
17dynamic.rhs.mailpolice.com
1cart00ney.surriel.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 16 August 2006.