Blacklists Compared

8 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
96972(total number of IP addresses tested, including 490 at SDSC)
86289(union of most IP zones)
62442block.blars.org
56365dnsbl.sorbs.net (union of all results)
42748dnsbl.sorbs.net (result 127.0.0.10 = dialup)
42055t1.dnsbl.net.au
41273dnsbl.tqmcube.com (union of all results)
37714blackholes.five-ten-sg.com (union of all results)
36697blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
33835sbl-xbl.spamhaus.org (union of all results)
32742xbl.spamhaus.org (union of all results)
30489dynablock.njabl.org
30350xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
30349cbl.abuseat.org
30341sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
23050psbl.surriel.com
22958cn-kr.blackholes.us (result 127.0.0.2 = China)
22958cn-kr.blackholes.us (union of all results)
16915china.blackholes.us
16375dnsbl.tqmcube.com (result 127.0.0.5 = China)
16000no-more-funn.moensted.dk (union of all results)
14218dnsbl.tqmcube.com (result 127.0.0.2 = dialup)
12517unconfirmed.dsbl.org
12398list.dsbl.org
12391dsbl.dnsbl.net.au
12349blacklist.spambag.org
11956bl.csma.biz
11432dnsbl-1.uceprotect.net
10941bl.spamcop.net
10639dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
9697dnsbl-2.uceprotect.net
8522combined-hib.dnsiplists.completewhois.com (union of all results)
8517combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
7741wpbl.dnsbl.net.au
7698dnsbl.tqmcube.com (result 127.0.0.3 = spam source)
7676dnsbl.sorbs.net (result 127.0.0.6 = spam source)
7100dnsbl.njabl.org (union of all results)
6451no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
6215korea.services.net
6044korea.blackholes.us
5943sbl.csma.biz
5715dnsbl.njabl.org (result 127.0.0.9 = open proxy)
5272no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
5143l2.spews.dnsbl.sorbs.net
4372unsure.nether.net
4340dnsbl.ahbl.org (union of all results)
4281xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
4280sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
3979no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
3976dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
3921l1.spews.dnsbl.sorbs.net
3912rmst.dnsbl.net.au
3902brazil.blackholes.us
3574spamsources.fabel.dk
3199dnsbl.tqmcube.com (result 127.0.0.4 = South Korea)
2693dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
2330mail-abuse.blacklist.jippg.org
2242ricn.dnsbl.net.au
1914taiwan.blackholes.us
1798dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1755tr.countries.nerd.dk
1748turkey.blackholes.us
1721japan.blackholes.us
1601spam.wytnij.to
1331bl.spamcannibal.org
1308sbl.spamhaus.org
1305sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1159dnsbl-3.uceprotect.net
1106mexico.blackholes.us
1100spews.dnsbl.net.au
1042dnsbl.njabl.org (result 127.0.0.3 = dialup)
889argentina.blackholes.us
807probes.dnsbl.net.au
643russia.blackholes.us
520hongkong.blackholes.us
515malaysia.blackholes.us
499blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
453thailand.blackholes.us
351singapore.blackholes.us
336dnsbl.ahbl.org (result 127.0.0.4 = spam source)
328dnsbl.antispam.or.id
287no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
272no-more-funn.moensted.dk (result 127.0.0.9 = misc)
270blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
218dnsbl.njabl.org (result 127.0.0.4 = spam source)
193blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
172ohps.dnsbl.net.au
152dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
149blackholes.intersil.net
142dnsbl.njabl.org (result 127.0.0.2 = open relay)
136query.bondedsender.org (not a blacklist!)
133work.drbl.croco.net
113dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
105multihop.dsbl.org
80relays.ordb.org
80flowgoaway.com
56relays.nether.net
40blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
40blackholes.uceb.org (union of all results)
31no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
27osps.dnsbl.net.au
27rdts.dnsbl.net.au
20blackholes.uceb.org (result 127.0.0.2 = open relay)
19spamguard.leadmon.net (union of all results)
17blackholes.uceb.org (result 127.0.0.3 = spam source)
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)
16spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
16dnsbl.ahbl.org (result 127.0.0.15 = open relay)
15dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
15exemptions.ahbl.org (not a blacklist!)
12nigeria.blackholes.us
10blackholes.brainerd.net
7blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
7blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
6owps.dnsbl.net.au
6osrs.dnsbl.net.au
6hil.habeas.com
6combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
4dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
3blackholes.uceb.org (result 127.0.0.5 = dialup)
3spamsites.dnsbl.net.au
3spamguard.leadmon.net (result 127.0.0.3 = spam source)
3bl.deadbeef.com
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1omrs.dnsbl.net.au
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)

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
96972(total number of IP addresses whose names were tested, including 490 at SDSC)
51016(union of all domain zones)
38882abuse.rfc-ignorant.org
36536rddn.dnsbl.net.au
26807dynamic.rhs.mailpolice.com
25385whois.rfc-ignorant.org (union of all results)
19252whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
6135whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3282webmail.rhs.mailpolice.com
610rhsbl.ahbl.org
408adv.rhs.mailpolice.com
393postmaster.rfc-ignorant.org
108dsn.rfc-ignorant.org (zone not intended for this use)
101bogusmx.rfc-ignorant.org
84bulk.rhs.mailpolice.com
8porn.rhs.mailpolice.com
4cart00ney.surriel.com
1blackhole.securitysage.com


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

HitsDNS Zone
52627(total number of domains tested, including 401 at SDSC)
10047(union of all domain zones)
3990whois.rfc-ignorant.org (union of all results)
3498abuse.rfc-ignorant.org
3365whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1652webmail.rhs.mailpolice.com
1390rhsbl.ahbl.org
1302postmaster.rfc-ignorant.org
986dsn.rfc-ignorant.org
726bogusmx.rfc-ignorant.org
625whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
285porn.rhs.mailpolice.com
175bulk.rhs.mailpolice.com
152blackhole.securitysage.com
144adv.rhs.mailpolice.com
54rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
54rhsbl.sorbs.net (union of all results)
32rddn.dnsbl.net.au (zone not intended for this use)
22ex.dnsbl.org
12dynamic.rhs.mailpolice.com
1cart00ney.surriel.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 4 August 2006.