Blacklists Compared

17 February 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 block.blars.org zone is also excluded.

HitsDNS Zone
133382(total number of IP addresses tested, including 515 at SDSC)
125749(union of most IP zones)
102481t1.dnsbl.net.au
95288zen.spamhaus.org (union of all results)
77142dnsbl.sorbs.net (union of all results)
73444no-more-funn.moensted.dk (union of all results)
67260sbl-xbl.spamhaus.org (union of all results)
66609xbl.spamhaus.org (union of all results)
65972sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
65955zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
65931xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
65850cbl.abuseat.org
65418block.blars.org
62904blackholes.five-ten-sg.com (union of all results)
61794psbl.surriel.com
60408dnsbl.tqmcube.com (union of all results)
59433dynablock.njabl.org
59422pbl.spamhaus.org (union of all results)
59056dnsbl.sorbs.net (result 127.0.0.10 = dialup)
58022blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
55243pbl.spamhaus.org (result 127.0.0.11 = Spamhaus entry)
55240zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
49643no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
49399dnsbl-2.uceprotect.net
47127dnsbl-1.uceprotect.net
37308dnsbl.tqmcube.com (result 127.0.0.2 = dialup)
31386l2.apews.dnsbl.uceprotect.net
29719dnsbl-3.uceprotect.net
27571dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
20726bl.spamcop.net
16846wpbl.dnsbl.net.au
15307no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
12976dnsbl.tqmcube.com (result 127.0.0.3 = spam source)
12818bl.csma.biz
11981unconfirmed.dsbl.org
11894list.dsbl.org
11887dsbl.dnsbl.net.au
10827cn-kr.blackholes.us (result 127.0.0.2 = China)
10827cn-kr.blackholes.us (union of all results)
10083ubl.unsubscore.com
8954dnsbl.tqmcube.com (result 127.0.0.5 = China)
8762unsure.nether.net
8330no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
8143blacklist.spambag.org
7214dnsbl.tqmcube.com (result 127.0.0.4 = South Korea)
7199korea.services.net
6535ix.dnsbl.manitu.net
6135tr.countries.nerd.dk
5836china.blackholes.us
4946korea.blackholes.us
4739mail-abuse.blacklist.jippg.org
4371turkey.blackholes.us
4263dnsbl.njabl.org (union of all results)
4253spews.dnsbl.net.au
4213rmst.dnsbl.net.au
4180zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4180pbl.spamhaus.org (result 127.0.0.10 = ISP contributed)
3961dnsbl.njabl.org (result 127.0.0.9 = open proxy)
3782blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2769dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2729dnsbl.ahbl.org (union of all results)
2600dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2543bl.spamcannibal.org
2432russia.blackholes.us
2155zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
2155xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
2155sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
2035spamsources.fabel.dk
2028probes.dnsbl.net.au
1694brazil.blackholes.us
1543list.dnswl.org (not a blacklist!)
1333japan.blackholes.us
1295taiwan.blackholes.us
950blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
917thailand.blackholes.us
869dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
787malaysia.blackholes.us
780zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
780sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
780sbl.spamhaus.org
719argentina.blackholes.us
704dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
574blackholes.uceb.org (union of all results)
531blackholes.uceb.org (result 127.0.0.6 = spam haven)
496mexico.blackholes.us
296blackholes.uceb.org (result 127.0.0.3 = spam source)
275hongkong.blackholes.us
247no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
211singapore.blackholes.us
191work.drbl.croco.net
177query.bondedsender.org (not a blacklist!)
163no-more-funn.moensted.dk (result 127.0.0.9 = misc)
161sbl.csma.biz
149dnsbl.njabl.org (result 127.0.0.2 = open relay)
136dnsbl.njabl.org (result 127.0.0.4 = spam source)
130dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
118iadb.isipp.com (not a blacklist!)
112accredit.habeas.com (not a blacklist!)
100blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
74spam.wytnij.to
70multihop.dsbl.org
53flowgoaway.com
47bl.deadbeef.com
42blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
42dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
35tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
35tor.dnsbl.sectoor.de (union of all results)
32dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
27blackholes.uceb.org (result 127.0.0.5 = dialup)
21relays.nether.net
19nigeria.blackholes.us
19multi.surbl.org
18ohps.dnsbl.net.au
17dnsbl.njabl.org (result 127.0.0.3 = dialup)
14exemptions.ahbl.org (not a blacklist!)
12rdts.dnsbl.net.au
12dnsbl.ahbl.org (result 127.0.0.15 = open relay)
10osps.dnsbl.net.au
9dnsbl.ahbl.org (result 127.0.0.4 = spam source)
9spamguard.leadmon.net (union of all results)
8dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
6blackholes.uceb.org (result 127.0.0.2 = open relay)
6osrs.dnsbl.net.au
6spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
5blackholes.brainerd.net
4dnsbl.sorbs.net (result 127.0.0.5 = open relay)
3multi.uribl.com (result 127.0.0.2 = spam resource)
3spamguard.leadmon.net (result 127.0.0.3 = spam source)
3blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
3multi.uribl.com (union of all results)
2owps.dnsbl.net.au
2blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
2blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1omrs.dnsbl.net.au
1no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
1blackholes.five-ten-sg.com (result 127.0.0.13 = challenge-response source)


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

HitsDNS Zone
133382(total number of IP addresses whose names were tested, including 515 at SDSC)
76747(union of all domain zones)
55160rddn.dnsbl.net.au
49783abuse.rfc-ignorant.org
36080dynamic.rhs.mailpolice.com
32687l1.apews.rhsbl.uceprotect.net
28265whois.rfc-ignorant.org (union of all results)
15737whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
12528whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3353webmail.rhs.mailpolice.com
650postmaster.rfc-ignorant.org
523adv.rhs.mailpolice.com
353multi.surbl.org
267multi.uribl.com (union of all results)
265multi.uribl.com (result 127.0.0.2 = spam resource)
164rhsbl.ahbl.org
133bl.deadbeef.com
117bulk.rhs.mailpolice.com
88dsn.rfc-ignorant.org (zone not intended for this use)
85bogusmx.rfc-ignorant.org
7porn.rhs.mailpolice.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
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
74978(total number of domains tested, including 501 at SDSC)
16014(union of all domain zones)
7199whois.rfc-ignorant.org (union of all results)
6531whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4047abuse.rfc-ignorant.org
2253multi.surbl.org
2205webmail.rhs.mailpolice.com
1650multi.uribl.com (union of all results)
1615multi.uribl.com (result 127.0.0.2 = spam resource)
1472postmaster.rfc-ignorant.org
991bogusmx.rfc-ignorant.org
809dsn.rfc-ignorant.org
668whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
412rhsbl.ahbl.org
308porn.rhs.mailpolice.com
239bulk.rhs.mailpolice.com
223adv.rhs.mailpolice.com
149blackhole.securitysage.com
62rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
62rhsbl.sorbs.net (union of all results)
31multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
27l1.apews.rhsbl.uceprotect.net
25rddn.dnsbl.net.au (zone not intended for this use)
14dynamic.rhs.mailpolice.com
13ex.dnsbl.org
4multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
4bl.deadbeef.com
2fraud.rhs.mailpolice.com
1cart00ney.surriel.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 23 February 2007.