Blacklists Compared

8 October 2005

[ 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
47695(total number of IP addresses tested, including 491 at SDSC)
41488(union of most IP zones)
32878block.blars.org
28122t1.dnsbl.net.au
24403dnsbl.sorbs.net (union of all results)
24286blackholes.five-ten-sg.com (union of all results)
23355blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
21490sbl-xbl.spamhaus.org (union of all results)
20489xbl.spamhaus.org (union of all results)
19699sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
19694xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
19663cbl.abuseat.org
17323dnsbl.sorbs.net (result 127.0.0.10 = dialup)
13505psbl.surriel.com
12199dynablock.njabl.org
10604no-more-funn.moensted.dk (union of all results)
9374unconfirmed.dsbl.org
9292list.dsbl.org
9289dsbl.dnsbl.net.au
9036sbl.csma.biz
7740rmst.dnsbl.net.au
7712cn-kr.blackholes.us (result 127.0.0.2 = China)
7712cn-kr.blackholes.us (union of all results)
5473bl.spamcop.net
5276combined-hib.dnsiplists.completewhois.com (union of all results)
5268combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
5006china.blackholes.us
4394bl.csma.biz
4347blacklist.spambag.org
4259no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
3977dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
3754korea.services.net
3641no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
3593l2.spews.dnsbl.sorbs.net
3278dnsbl.rangers.eu.org (union of all results)
3135dnsbl.njabl.org (union of all results)
3096dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3088l1.spews.dnsbl.sorbs.net
3084spews.dnsbl.net.au
3063dnsbl.rangers.eu.org (result 127.0.0.2 = dialup)
2706korea.blackholes.us
2699spamsources.fabel.dk
2578dnsbl.ahbl.org (union of all results)
2390ricn.dnsbl.net.au
2347dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2318wpbl.dnsbl.net.au
2283dnsbl.regedit64.net
2180unsure.nether.net
2095dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2010brazil.blackholes.us
1969no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1694xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1693sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1693opm.blitzed.org
1292dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1238xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1238sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1207sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1207sbl.spamhaus.org
976dnsbl.antispam.or.id
948bl.spamcannibal.org
870dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
818spam.wytnij.to
801japan.blackholes.us
689russia.blackholes.us
583probes.dnsbl.net.au
582mexico.blackholes.us
540no-more-funn.moensted.dk (result 127.0.0.9 = misc)
530dnsbl.njabl.org (result 127.0.0.3 = dialup)
477tr.countries.nerd.dk
472turkey.blackholes.us
472dnsbl.ahbl.org (result 127.0.0.4 = spam source)
457taiwan.blackholes.us
449blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
410hongkong.blackholes.us
378argentina.blackholes.us
340blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
202no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
198query.bondedsender.org (not a blacklist!)
177singapore.blackholes.us
172malaysia.blackholes.us
149dnsbl.njabl.org (result 127.0.0.4 = spam source)
144blackholes.intersil.net
131dnsbl.rangers.eu.org (result 127.0.0.16 = spam haven)
128mail-abuse.blacklist.jippg.org
123dnsbl.njabl.org (result 127.0.0.2 = open relay)
104thailand.blackholes.us
102dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
100dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
95relays.ordb.org
90blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
75ohps.dnsbl.net.au
74multihop.dsbl.org
71dnsbl.rangers.eu.org (result 127.0.0.8 = spam source)
70flowgoaway.com
41blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
30exemptions.ahbl.org (not a blacklist!)
28osps.dnsbl.net.au
26relays.nether.net
21blackholes.uceb.org (union of all results)
17rdts.dnsbl.net.au
17blackholes.brainerd.net
12osrs.dnsbl.net.au
11dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
11spamguard.leadmon.net (union of all results)
10dnsbl.sorbs.net (result 127.0.0.5 = open relay)
10dnsbl.rangers.eu.org (result 127.0.0.4 = virus notices)
9spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
8blackholes.uceb.org (result 127.0.0.6 = spam haven)
8tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
8combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
7blackholes.uceb.org (result 127.0.0.2 = open relay)
7blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
6blackholes.uceb.org (result 127.0.0.3 = spam source)
4hil.habeas.com
3dnsbl.rangers.eu.org (result 127.0.0.32 = worm source)
3owps.dnsbl.net.au
3blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
2omrs.dnsbl.net.au
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
2dialup.blacklist.jippg.org (union of all results)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
1bl.deadbeef.com

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
47695(total number of IP addresses whose names were tested, including 491 at SDSC)
24035(union of all domain zones)
17932abuse.rfc-ignorant.org
14755rddn.dnsbl.net.au
11265whois.rfc-ignorant.org (union of all results)
9162whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
7136dynamic.rhs.mailpolice.com
2134webmail.rhs.mailpolice.com
2110whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
936rhsbl.ahbl.org
437adv.rhs.mailpolice.com
413bl.deadbeef.com
313postmaster.rfc-ignorant.org
303bulk.rhs.mailpolice.com
180bogusmx.rfc-ignorant.org
174dsn.rfc-ignorant.org (zone not intended for this use)

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

HitsDNS Zone
24664(total number of domains tested, including 414 at SDSC)
6825(union of all domain zones)
2909whois.rfc-ignorant.org (union of all results)
2454whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2296abuse.rfc-ignorant.org
1300postmaster.rfc-ignorant.org
1072webmail.rhs.mailpolice.com
885rhsbl.ahbl.org
860dsn.rfc-ignorant.org
475bogusmx.rfc-ignorant.org
455whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
276bulk.rhs.mailpolice.com
198adv.rhs.mailpolice.com
161bl.deadbeef.com
149blackhole.securitysage.com
94porn.rhs.mailpolice.com
46rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
46rhsbl.sorbs.net (union of all results)
20rddn.dnsbl.net.au (zone not intended for this use)
17ex.dnsbl.org
5dynamic.rhs.mailpolice.com
2cart00ney.surriel.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 19 October 2005.