Blacklists Compared

1 September 2007

[ 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, query.bondedsender.org, list.dnswl.org, accredit.habeas.com, iadb.isipp.com, and iadb2.isipp.com zones because they are not blacklists. Because it is too aggressive to be widely useful the l2.apews.org zone is also excluded from the union.

HitsDNS Zone
237571(total number of IP addresses tested, including 622 at SDSC)
227258(union of most IP zones)
199146l2.apews.org
183840zen.spamhaus.org (union of all results)
173138t1.dnsbl.net.au
141577pbl.spamhaus.org (union of all results)
135420dynablock.njabl.org
132571dnsbl.sorbs.net (union of all results)
123390dnsbl.tqmcube.com (union of all results)
119092sbl-xbl.spamhaus.org (union of all results)
118247xbl.spamhaus.org (union of all results)
117876zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
117876xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
117870cbl.abuseat.org
117827sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
117424zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
117424pbl.spamhaus.org (result 127.0.0.11 = Spamhaus entry)
116488psbl.surriel.com
107249no-more-funn.moensted.dk (union of all results)
104807dnsbl-1.uceprotect.net
100863dnsbl.sorbs.net (result 127.0.0.10 = dialup)
96904dnsbl-2.uceprotect.net
95626blackholes.five-ten-sg.com (union of all results)
89590blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
83978no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
82582dnsbl.tqmcube.com (result 127.0.0.2 = dialup)
67241ubl.unsubscore.com
59000dnsbl-3.uceprotect.net
45650bl.spamcop.net
36375dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
34134dnsbl.tqmcube.com (result 127.0.0.3 = spam source)
24887zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
24887pbl.spamhaus.org (result 127.0.0.10 = ISP contributed)
24600ix.dnsbl.manitu.net
23391db.wpbl.info
20491no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
19505mail-abuse.blacklist.jippg.org
18564bl.csma.biz
16590unconfirmed.dsbl.org
16407dsbl.dnsbl.net.au
16398list.dsbl.org
13773tr.countries.nerd.dk
13608korea.services.net
13207dnsbl.tqmcube.com (result 127.0.0.4 = South Korea)
12952ips.backscatterer.org
10487dnsbl.tqmcube.com (result 127.0.0.5 = China)
5432turkey.blackholes.us
5418bl.spamcannibal.org
5313cn-kr.blackholes.us (result 127.0.0.2 = China)
5313cn-kr.blackholes.us (union of all results)
5007dnsbl.njabl.org (union of all results)
4833blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
4717dnsbl.njabl.org (result 127.0.0.9 = open proxy)
3987list.dnswl.org (not a blacklist!)
3926russia.blackholes.us
3520spamsources.fabel.dk
3434dnsbl.ahbl.org (union of all results)
3258dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
3221rmst.dnsbl.net.au
2881korea.blackholes.us
2370china.blackholes.us
1532probes.dnsbl.net.au
1452no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
1159zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1159xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1158sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1118blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1087zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1087sbl.spamhaus.org
1086sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1057no-more-funn.moensted.dk (result 127.0.0.9 = misc)
721malaysia.blackholes.us
692japan.blackholes.us
561aspews.ext.sorbs.net
515thailand.blackholes.us
490taiwan.blackholes.us
440no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
407blackholes.uceb.org (union of all results)
400dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
395dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
343blackholes.uceb.org (result 127.0.0.6 = spam haven)
211multi.surbl.org
190bl.deadbeef.com
183blackholes.uceb.org (result 127.0.0.3 = spam source)
182dnsbl.njabl.org (result 127.0.0.4 = spam source)
174multi.uribl.com (result 127.0.0.2 = spam resource)
174multi.uribl.com (union of all results)
172query.bondedsender.org (not a blacklist!)
152accredit.habeas.com (not a blacklist!)
146iadb2.isipp.com (not a blacklist!)
143iadb.isipp.com (not a blacklist!)
129spam.wytnij.to
125multihop.dsbl.org
112dnsbl.ahbl.org (result 127.0.0.4 = spam source)
108dnsbl.njabl.org (result 127.0.0.2 = open relay)
99hongkong.blackholes.us
78relays.nether.net
49singapore.blackholes.us
43blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
42dnsbl.sorbs.net (result 127.0.0.6 = spam source)
40mexico.blackholes.us
39rdts.dnsbl.net.au
37blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
32dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
29argentina.blackholes.us
29dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
29ohps.dnsbl.net.au
28spamguard.leadmon.net (union of all results)
26blackholes.uceb.org (result 127.0.0.2 = open relay)
24blackholes.uceb.org (result 127.0.0.5 = dialup)
18exemptions.ahbl.org (not a blacklist!)
17blackholes.brainerd.net
15spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
13dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
11nigeria.blackholes.us
11dnsbl.ahbl.org (result 127.0.0.15 = open relay)
10spamguard.leadmon.net (result 127.0.0.3 = spam source)
8osps.dnsbl.net.au
4dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
3spamguard.leadmon.net (result 127.0.0.8 = open proxy)
3no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
2spamsites.dnsbl.net.au
2osrs.dnsbl.net.au
2blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
2dnsbl.ahbl.org (result 127.0.0.11 = no postmaster or abuse e-mail)
1owps.dnsbl.net.au
1no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
1blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
1dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)
1dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)


Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses.

HitsDNS Zone
237571(total number of IP addresses whose names were tested, including 622 at SDSC)
154830(union of all domain zones)
138208l1.apews.org
108418rddn.dnsbl.net.au
98988abuse.rfc-ignorant.org
63604dynamic.rhs.mailpolice.com
59266whois.rfc-ignorant.org (union of all results)
37029whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
22237whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
11350webmail.rhs.mailpolice.com
583multi.surbl.org
543multi.uribl.com (union of all results)
542multi.uribl.com (result 127.0.0.2 = spam resource)
514adv.rhs.mailpolice.com
186bl.deadbeef.com
127postmaster.rfc-ignorant.org
112rhsbl.ahbl.org
108bulk.rhs.mailpolice.com
100dsn.rfc-ignorant.org (zone not intended for this use)
97bogusmx.rfc-ignorant.org
31rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
31rhsbl.sorbs.net (union of all results)
25porn.rhs.mailpolice.com
2blackhole.securitysage.com
2ex.dnsbl.org
1multi.uribl.com (result 127.0.0.4 = opt-out spam resource)


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

HitsDNS Zone
211139(total number of domains tested, including 613 at SDSC)
41926(union of all domain zones)
26179whois.rfc-ignorant.org (union of all results)
25257whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
6235abuse.rfc-ignorant.org
3435multi.surbl.org
2870multi.uribl.com (union of all results)
2795multi.uribl.com (result 127.0.0.2 = spam resource)
2749l1.apews.org
2540bogusmx.rfc-ignorant.org
2476webmail.rhs.mailpolice.com
2197postmaster.rfc-ignorant.org
1160dsn.rfc-ignorant.org
946porn.rhs.mailpolice.com
922whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
493rhsbl.ahbl.org
446bulk.rhs.mailpolice.com
243blackhole.securitysage.com
207adv.rhs.mailpolice.com
201rddn.dnsbl.net.au (zone not intended for this use)
155dynamic.rhs.mailpolice.com
96rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
96rhsbl.sorbs.net (union of all results)
73multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
17ex.dnsbl.org
5bl.deadbeef.com
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1fraud.rhs.mailpolice.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 7 September 2007.