Blacklists Compared

7 January 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
54221(total number of IP addresses tested, including 481 at SDSC)
47465(union of most IP zones)
33894block.blars.org
30132dnsbl.sorbs.net (union of all results)
27553t1.dnsbl.net.au
25999blackholes.five-ten-sg.com (union of all results)
25189blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
24257dnsbl.sorbs.net (result 127.0.0.10 = dialup)
22651sbl-xbl.spamhaus.org (union of all results)
20932xbl.spamhaus.org (union of all results)
20134xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
20128sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
20060cbl.abuseat.org
18343psbl.surriel.com
17156dynablock.njabl.org
13335no-more-funn.moensted.dk (union of all results)
9833cn-kr.blackholes.us (result 127.0.0.2 = China)
9833cn-kr.blackholes.us (union of all results)
9238unconfirmed.dsbl.org
9168list.dsbl.org
9158dsbl.dnsbl.net.au
8615sbl.csma.biz
8160bl.spamcop.net
7924blacklist.spambag.org
6892no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
6605china.blackholes.us
4767l2.spews.dnsbl.sorbs.net
4513combined-hib.dnsiplists.completewhois.com (union of all results)
4501combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
4311l1.spews.dnsbl.sorbs.net
4200bl.csma.biz
4052spews.dnsbl.net.au
3994dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3834dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
3412wpbl.dnsbl.net.au
3370unsure.nether.net
3228korea.blackholes.us
3219korea.services.net
3104dnsbl.rangers.eu.org (union of all results)
3029no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2987no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
2876dnsbl.rangers.eu.org (result 127.0.0.2 = dialup)
2755dnsbl.njabl.org (union of all results)
2656dnsbl.ahbl.org (union of all results)
2560rmst.dnsbl.net.au
2159sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
2158sbl.spamhaus.org
1948ricn.dnsbl.net.au
1812dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1758brazil.blackholes.us
1566dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1545japan.blackholes.us
1363xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1361opm.blitzed.org
1360sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1172spamsources.fabel.dk
1171spam.wytnij.to
1083dnsbl.antispam.or.id
1082dnsbl.ahbl.org (result 127.0.0.4 = spam source)
979dnsbl.regedit64.net
951dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
911russia.blackholes.us
840sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
838xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
800dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
767bl.spamcannibal.org
760probes.dnsbl.net.au
702dnsbl.njabl.org (result 127.0.0.3 = dialup)
663taiwan.blackholes.us
637turkey.blackholes.us
637tr.countries.nerd.dk
470mail-abuse.blacklist.jippg.org
444mexico.blackholes.us
354argentina.blackholes.us
333blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
330blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
299malaysia.blackholes.us
288hongkong.blackholes.us
235no-more-funn.moensted.dk (result 127.0.0.9 = misc)
205no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
198singapore.blackholes.us
184query.bondedsender.org (not a blacklist!)
182thailand.blackholes.us
144dnsbl.rangers.eu.org (result 127.0.0.16 = spam haven)
134blackholes.intersil.net
128dnsbl.njabl.org (result 127.0.0.4 = spam source)
123dnsbl.njabl.org (result 127.0.0.2 = open relay)
110relays.ordb.org
108blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
90flowgoaway.com
82dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
70ohps.dnsbl.net.au
61dnsbl.rangers.eu.org (result 127.0.0.8 = spam source)
58multihop.dsbl.org
45dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
22dnsbl.rangers.eu.org (result 127.0.0.4 = virus notices)
22blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
21osps.dnsbl.net.au
21rdts.dnsbl.net.au
19relays.nether.net
15blackholes.uceb.org (union of all results)
14hil.habeas.com
14exemptions.ahbl.org (not a blacklist!)
12combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
10blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
8nigeria.blackholes.us
8osrs.dnsbl.net.au
8dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
7blackholes.uceb.org (result 127.0.0.6 = spam haven)
6dnsbl.ahbl.org (result 127.0.0.15 = open relay)
5owps.dnsbl.net.au
5spamguard.leadmon.net (union of all results)
4blackholes.uceb.org (result 127.0.0.3 = spam source)
4blackholes.uceb.org (result 127.0.0.2 = open relay)
4dnsbl.sorbs.net (result 127.0.0.5 = open relay)
4blackholes.brainerd.net
3spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
3blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
2tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2spamguard.leadmon.net (result 127.0.0.8 = open proxy)
2tor.dnsbl.sectoor.de (union of all results)
1dnsbl.rangers.eu.org (result 127.0.0.32 = worm source)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
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
54221(total number of IP addresses whose names were tested, including 481 at SDSC)
30937(union of all domain zones)
20268rddn.dnsbl.net.au
19613abuse.rfc-ignorant.org
14374whois.rfc-ignorant.org (union of all results)
11737whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
8600dynamic.rhs.mailpolice.com
2637whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2069webmail.rhs.mailpolice.com
1274rhsbl.ahbl.org
518bl.deadbeef.com
429bulk.rhs.mailpolice.com
424adv.rhs.mailpolice.com
231postmaster.rfc-ignorant.org
105bogusmx.rfc-ignorant.org
99dsn.rfc-ignorant.org (zone not intended for this use)
3blackhole.securitysage.com
1porn.rhs.mailpolice.com

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

HitsDNS Zone
31259(total number of domains tested, including 421 at SDSC)
6556(union of all domain zones)
2286whois.rfc-ignorant.org (union of all results)
2102abuse.rfc-ignorant.org
1862whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1161rhsbl.ahbl.org
1073postmaster.rfc-ignorant.org
905webmail.rhs.mailpolice.com
716dsn.rfc-ignorant.org
472bogusmx.rfc-ignorant.org
424whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
381bulk.rhs.mailpolice.com
182adv.rhs.mailpolice.com
127bl.deadbeef.com
114blackhole.securitysage.com
102porn.rhs.mailpolice.com
36rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
36rhsbl.sorbs.net (union of all results)
33rddn.dnsbl.net.au (zone not intended for this use)
14ex.dnsbl.org
8dynamic.rhs.mailpolice.com
2cart00ney.surriel.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 22 January 2006.