Blacklists Compared

22 April 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
80054(total number of IP addresses tested, including 646 at SDSC)
70471(union of most IP zones)
50730block.blars.org
37633dnsbl.sorbs.net (union of all results)
36509t1.dnsbl.net.au
31203sbl-xbl.spamhaus.org (union of all results)
28127xbl.spamhaus.org (union of all results)
28119dnsbl.sorbs.net (result 127.0.0.10 = dialup)
27025cbl.abuseat.org
26995sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
26991xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
25742dynablock.njabl.org
23346psbl.surriel.com
20087cn-kr.blackholes.us (result 127.0.0.2 = China)
20087cn-kr.blackholes.us (union of all results)
18173no-more-funn.moensted.dk (union of all results)
15706china.blackholes.us
15151blackholes.five-ten-sg.com (union of all results)
14991sbl.csma.biz
14850blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
12660unconfirmed.dsbl.org
12561dsbl.dnsbl.net.au
12556list.dsbl.org
11588dnsbl-1.uceprotect.net
10751blacklist.spambag.org
10671dnsbl-2.uceprotect.net
7926no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
7826dnsbl.sorbs.net (result 127.0.0.6 = spam source)
7813bl.spamcop.net
7094bl.csma.biz
5527no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
5353wpbl.dnsbl.net.au
5149l2.spews.dnsbl.sorbs.net
4928unsure.nether.net
4463dnsbl.njabl.org (union of all results)
4447korea.services.net
4423l1.spews.dnsbl.sorbs.net
4381korea.blackholes.us
4036no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
3855sbl.spamhaus.org
3848sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
3313spamsources.fabel.dk
3266rmst.dnsbl.net.au
3143dnsbl.njabl.org (result 127.0.0.9 = open proxy)
3108dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
3077dnsbl.ahbl.org (union of all results)
2957ricn.dnsbl.net.au
2513dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2413spews.dnsbl.net.au
2269combined-hib.dnsiplists.completewhois.com (union of all results)
2266combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
2045xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
2045sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1948opm.blitzed.org
1873brazil.blackholes.us
1692spam.wytnij.to
1580russia.blackholes.us
1410mail-abuse.blacklist.jippg.org
1282japan.blackholes.us
1196dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1187turkey.blackholes.us
1183tr.countries.nerd.dk
1118dnsbl.njabl.org (result 127.0.0.3 = dialup)
1065probes.dnsbl.net.au
999bl.spamcannibal.org
996taiwan.blackholes.us
981dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
794dnsbl-3.uceprotect.net
738mexico.blackholes.us
733dnsbl.antispam.or.id
673argentina.blackholes.us
542dnsbl.ahbl.org (result 127.0.0.4 = spam source)
400hongkong.blackholes.us
380no-more-funn.moensted.dk (result 127.0.0.9 = misc)
304malaysia.blackholes.us
304no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
269thailand.blackholes.us
206singapore.blackholes.us
176xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
176sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
154blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
138blackholes.intersil.net
130blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
127query.bondedsender.org (not a blacklist!)
116dnsbl.njabl.org (result 127.0.0.2 = open relay)
114dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
97dnsbl.njabl.org (result 127.0.0.4 = spam source)
93relays.ordb.org
82multihop.dsbl.org
78flowgoaway.com
72dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
61ohps.dnsbl.net.au
27osps.dnsbl.net.au
20rdts.dnsbl.net.au
18relays.nether.net
16tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
16tor.dnsbl.sectoor.de (union of all results)
14dnsbl.ahbl.org (result 127.0.0.15 = open relay)
14dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
12blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
12exemptions.ahbl.org (not a blacklist!)
11blackholes.uceb.org (union of all results)
10dnsbl.sorbs.net (result 127.0.0.5 = open relay)
9nigeria.blackholes.us
7osrs.dnsbl.net.au
7spamguard.leadmon.net (union of all results)
6blackholes.brainerd.net
5blackholes.uceb.org (result 127.0.0.2 = open relay)
5owps.dnsbl.net.au
4blackholes.uceb.org (result 127.0.0.3 = spam source)
4hil.habeas.com
4blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
3spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3spamguard.leadmon.net (result 127.0.0.3 = spam source)
3bl.deadbeef.com
3combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
2blackholes.uceb.org (result 127.0.0.5 = dialup)
2dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)

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
80054(total number of IP addresses whose names were tested, including 646 at SDSC)
42234(union of all domain zones)
30178abuse.rfc-ignorant.org
27911rddn.dnsbl.net.au
21045dynamic.rhs.mailpolice.com
20412whois.rfc-ignorant.org (union of all results)
16207whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
4208whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2350webmail.rhs.mailpolice.com
904rhsbl.ahbl.org
672bl.deadbeef.com
515adv.rhs.mailpolice.com
230postmaster.rfc-ignorant.org
123bogusmx.rfc-ignorant.org
122bulk.rhs.mailpolice.com
118dsn.rfc-ignorant.org (zone not intended for this use)
3porn.rhs.mailpolice.com
1blackhole.securitysage.com
1cart00ney.surriel.com


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

HitsDNS Zone
52841(total number of domains tested, including 606 at SDSC)
10353(union of all domain zones)
4697whois.rfc-ignorant.org (union of all results)
4226whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2860abuse.rfc-ignorant.org
1418webmail.rhs.mailpolice.com
1238bogusmx.rfc-ignorant.org
1050rhsbl.ahbl.org
1045postmaster.rfc-ignorant.org
742dsn.rfc-ignorant.org
471whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
237porn.rhs.mailpolice.com
184adv.rhs.mailpolice.com
174bl.deadbeef.com
144bulk.rhs.mailpolice.com
127blackhole.securitysage.com
26rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
26rhsbl.sorbs.net (union of all results)
15rddn.dnsbl.net.au (zone not intended for this use)
11ex.dnsbl.org
7dynamic.rhs.mailpolice.com
3cart00ney.surriel.com
2fraud.rhs.mailpolice.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 10 May 2006.