Blacklists Compared

17 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
84829(total number of IP addresses tested, including 510 at SDSC)
75931(union of most IP zones)
54554block.blars.org
44261dnsbl.sorbs.net (union of all results)
37448t1.dnsbl.net.au
37307blackholes.five-ten-sg.com (union of all results)
36323blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
34031dnsbl.sorbs.net (result 127.0.0.10 = dialup)
30385sbl-xbl.spamhaus.org (union of all results)
29326xbl.spamhaus.org (union of all results)
27016cbl.abuseat.org
27011sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
26994xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
26820psbl.surriel.com
26020dynablock.njabl.org
23587cn-kr.blackholes.us (result 127.0.0.2 = China)
23587cn-kr.blackholes.us (union of all results)
18075sbl.csma.biz
17199china.blackholes.us
14585no-more-funn.moensted.dk (union of all results)
12232unconfirmed.dsbl.org
12100list.dsbl.org
12094dsbl.dnsbl.net.au
11760dnsbl-2.uceprotect.net
10806bl.spamcop.net
10783dnsbl-1.uceprotect.net
9888blacklist.spambag.org
9440bl.csma.biz
8367combined-hib.dnsiplists.completewhois.com (union of all results)
8363combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
8059dnsbl.sorbs.net (result 127.0.0.6 = spam source)
6857dnsbl.njabl.org (union of all results)
6661no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
6568korea.services.net
6388korea.blackholes.us
6330wpbl.dnsbl.net.au
5616dnsbl.njabl.org (result 127.0.0.9 = open proxy)
4436dnsbl.ahbl.org (union of all results)
4425xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
4425sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
4256l2.spews.dnsbl.sorbs.net
4223no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
4039dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
3825spamsources.fabel.dk
3770unsure.nether.net
3503rmst.dnsbl.net.au
3196l1.spews.dnsbl.sorbs.net
3179no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
3095dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
2983brazil.blackholes.us
2802dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
2287ricn.dnsbl.net.au
1749mail-abuse.blacklist.jippg.org
1618dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1582japan.blackholes.us
1453sbl.spamhaus.org
1448sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1444taiwan.blackholes.us
1278spews.dnsbl.net.au
1255dnsbl-3.uceprotect.net
1197tr.countries.nerd.dk
1189turkey.blackholes.us
1178bl.spamcannibal.org
934dnsbl.njabl.org (result 127.0.0.3 = dialup)
848probes.dnsbl.net.au
846russia.blackholes.us
765argentina.blackholes.us
751mexico.blackholes.us
590blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
430hongkong.blackholes.us
408malaysia.blackholes.us
366dnsbl.antispam.or.id
361dnsbl.ahbl.org (result 127.0.0.4 = spam source)
350thailand.blackholes.us
260singapore.blackholes.us
259no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
254no-more-funn.moensted.dk (result 127.0.0.9 = misc)
204ohps.dnsbl.net.au
185dnsbl.njabl.org (result 127.0.0.4 = spam source)
171blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
170work.drbl.croco.net
163query.bondedsender.org (not a blacklist!)
151blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
148blackholes.intersil.net
142dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
131dnsbl.njabl.org (result 127.0.0.2 = open relay)
106multihop.dsbl.org
106dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
87flowgoaway.com
79spam.wytnij.to
78relays.ordb.org
55blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
26osps.dnsbl.net.au
25dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
23relays.nether.net
20dnsbl.sorbs.net (result 127.0.0.5 = open relay)
19blackholes.uceb.org (union of all results)
18dnsbl.ahbl.org (result 127.0.0.15 = open relay)
16exemptions.ahbl.org (not a blacklist!)
16spamguard.leadmon.net (union of all results)
12spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
10osrs.dnsbl.net.au
9tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
9rdts.dnsbl.net.au
9hil.habeas.com
9no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
9tor.dnsbl.sectoor.de (union of all results)
8nigeria.blackholes.us
8blackholes.brainerd.net
7blackholes.uceb.org (result 127.0.0.3 = spam source)
7blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
6blackholes.uceb.org (result 127.0.0.5 = dialup)
6dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
5blackholes.uceb.org (result 127.0.0.2 = open relay)
5blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
4blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
4combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
3owps.dnsbl.net.au
2omrs.dnsbl.net.au
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
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
84829(total number of IP addresses whose names were tested, including 510 at SDSC)
42109(union of all domain zones)
32038abuse.rfc-ignorant.org
27860rddn.dnsbl.net.au
21317dynamic.rhs.mailpolice.com
20535whois.rfc-ignorant.org (union of all results)
15872whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
4664whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2848webmail.rhs.mailpolice.com
647rhsbl.ahbl.org
503adv.rhs.mailpolice.com
283postmaster.rfc-ignorant.org
110dsn.rfc-ignorant.org (zone not intended for this use)
104bogusmx.rfc-ignorant.org
78bulk.rhs.mailpolice.com
3porn.rhs.mailpolice.com

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

HitsDNS Zone
44882(total number of domains tested, including 416 at SDSC)
9166(union of all domain zones)
3258abuse.rfc-ignorant.org
3233whois.rfc-ignorant.org (union of all results)
2623whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1589rhsbl.ahbl.org
1391webmail.rhs.mailpolice.com
1332postmaster.rfc-ignorant.org
984dsn.rfc-ignorant.org
768bogusmx.rfc-ignorant.org
610whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
231porn.rhs.mailpolice.com
201adv.rhs.mailpolice.com
194bulk.rhs.mailpolice.com
193blackhole.securitysage.com
50rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
50rhsbl.sorbs.net (union of all results)
36rddn.dnsbl.net.au (zone not intended for this use)
17dynamic.rhs.mailpolice.com
16ex.dnsbl.org
2fraud.rhs.mailpolice.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 6 July 2006.