Blacklists Compared

1 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
50103(total number of IP addresses tested, including 468 at SDSC)
43118(union of most IP zones)
34778block.blars.org
29461t1.dnsbl.net.au
25802dnsbl.sorbs.net (union of all results)
21960sbl-xbl.spamhaus.org (union of all results)
20710xbl.spamhaus.org (union of all results)
19958sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
19955xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
19940cbl.abuseat.org
19827blackholes.five-ten-sg.com (union of all results)
19033blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
18317dnsbl.sorbs.net (result 127.0.0.10 = dialup)
12728dynablock.njabl.org
12563psbl.surriel.com
11113no-more-funn.moensted.dk (union of all results)
8935unconfirmed.dsbl.org
8840list.dsbl.org
8837dsbl.dnsbl.net.au
8412rmst.dnsbl.net.au
7751sbl.csma.biz
6846combined-hib.dnsiplists.completewhois.com (union of all results)
5738combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
5456dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
5367bl.spamcop.net
4690no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
4454blacklist.spambag.org
4396korea.services.net
3645no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
3617l2.spews.dnsbl.sorbs.net
3394dnsbl.rangers.eu.org (union of all results)
3179dnsbl.rangers.eu.org (result 127.0.0.2 = dialup)
3176dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3135bl.csma.biz
3123dnsbl.njabl.org (union of all results)
3115l1.spews.dnsbl.sorbs.net
3108spews.dnsbl.net.au
3044spamsources.fabel.dk
2825ricn.dnsbl.net.au
2567dnsbl.ahbl.org (union of all results)
2477dnsbl.regedit64.net
2332dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2217unsure.nether.net
2069wpbl.dnsbl.net.au
1976no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1917dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1489sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1489sbl.spamhaus.org
1336xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1336sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1335opm.blitzed.org
1171combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
1165dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1065xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1065sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1056bl.spamcannibal.org
901dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
840dnsbl.antispam.or.id
724spam.wytnij.to
638dnsbl.ahbl.org (result 127.0.0.4 = spam source)
595no-more-funn.moensted.dk (result 127.0.0.9 = misc)
583tr.countries.nerd.dk
578probes.dnsbl.net.au
493dnsbl.njabl.org (result 127.0.0.3 = dialup)
331blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
304blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
215no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
194dnsbl.njabl.org (result 127.0.0.2 = open relay)
191query.bondedsender.org (not a blacklist!)
162blackholes.intersil.net
134dnsbl.rangers.eu.org (result 127.0.0.16 = spam haven)
127relays.ordb.org
126dnsbl.njabl.org (result 127.0.0.4 = spam source)
125dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
112dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
102mail-abuse.blacklist.jippg.org
100blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
84ohps.dnsbl.net.au
78multihop.dsbl.org
71flowgoaway.com
70dnsbl.rangers.eu.org (result 127.0.0.8 = spam source)
39blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
32blackholes.brainerd.net
30exemptions.ahbl.org (not a blacklist!)
28osps.dnsbl.net.au
22blackholes.uceb.org (union of all results)
21osrs.dnsbl.net.au
21relays.nether.net
20rdts.dnsbl.net.au
19spamguard.leadmon.net (union of all results)
18spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
12blackholes.uceb.org (result 127.0.0.2 = open relay)
11dnsbl.sorbs.net (result 127.0.0.5 = open relay)
11dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
10dialup.blacklist.jippg.org (union of all results)
9dnsbl.rangers.eu.org (result 127.0.0.4 = virus notices)
9blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
8dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
8blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
7tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
7hil.habeas.com
5blackholes.uceb.org (result 127.0.0.3 = spam source)
4blackholes.uceb.org (result 127.0.0.6 = spam haven)
4owps.dnsbl.net.au
4no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
2dnsbl.rangers.eu.org (result 127.0.0.32 = worm source)
2dialup.blacklist.jippg.org (result 127.0.0.4 = dialup in Japan)
2blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1omrs.dnsbl.net.au
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
1bl.deadbeef.com
1dnsbl.ahbl.org (result 127.0.0.15 = open relay)

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
50103(total number of IP addresses whose names were tested, including 468 at SDSC)
25288(union of all domain zones)
18823abuse.rfc-ignorant.org
15319rddn.dnsbl.net.au
11948whois.rfc-ignorant.org (union of all results)
9607whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
7479dynamic.rhs.mailpolice.com
2345whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2195webmail.rhs.mailpolice.com
1117rhsbl.ahbl.org
448adv.rhs.mailpolice.com
448bl.deadbeef.com
286bulk.rhs.mailpolice.com
279postmaster.rfc-ignorant.org
162bogusmx.rfc-ignorant.org
155dsn.rfc-ignorant.org (zone not intended for this use)
2blackhole.securitysage.com
2porn.rhs.mailpolice.com
1cart00ney.surriel.com

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

HitsDNS Zone
25222(total number of domains tested, including 398 at SDSC)
7260(union of all domain zones)
3074whois.rfc-ignorant.org (union of all results)
2576whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2442abuse.rfc-ignorant.org
1381postmaster.rfc-ignorant.org
1058webmail.rhs.mailpolice.com
988rhsbl.ahbl.org
980dsn.rfc-ignorant.org
605bogusmx.rfc-ignorant.org
498whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
314bulk.rhs.mailpolice.com
236adv.rhs.mailpolice.com
154blackhole.securitysage.com
148bl.deadbeef.com
90porn.rhs.mailpolice.com
43rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
43rhsbl.sorbs.net (union of all results)
25rddn.dnsbl.net.au (zone not intended for this use)
14ex.dnsbl.org
9dynamic.rhs.mailpolice.com
2cart00ney.surriel.com
1fraud.rhs.mailpolice.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 11 October 2005.