Blacklists Compared

3 January 2004

[ 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
15059(total number of IP addresses tested, including 264 at SDSC)
12397(union of most IP zones)
8790t1.dnsbl.net.au
8156dnsbl.sorbs.net (union of all results)
6856block.blars.org
6590blackholes.five-ten-sg.com (union of all results)
5904unconfirmed.dsbl.org
5831blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
5780dsbl.dnsbl.net.au
5780list.dsbl.org
5516dnsbl.sorbs.net (result 127.0.0.10 = dialup)
5380dynablock.njabl.org
5128cbl.abuseat.org
5121xbl.spamhaus.org
3889bl.spamcop.net
3641no-more-funn.moensted.dk (union of all results)
3506dnsbl.njabl.org (union of all results)
2898sbl.csma.biz
2345cn-kr.blackholes.us (union of all results)
2046dnsbl.ahbl.org (union of all results)
1855dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1830no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1710dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1677dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1604unsure.nether.net
1535bl.csma.biz
1473no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1455dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1377cn-kr.blackholes.us (result 127.0.0.2 = China)
1377china.blackholes.us
1312ipwhois.rfc-ignorant.org
1300l2.spews.dnsbl.sorbs.net
1146spam.wytnij.to
1061sbl.spamhaus.org
1038l1.spews.dnsbl.sorbs.net
1037spews.dnsbl.net.au
1021dnsbl.njabl.org (result 127.0.0.3 = dialup)
968cn-kr.blackholes.us (result 127.0.0.3 = Korea)
968korea.blackholes.us
951korea.services.net
851psbl.surriel.com
782spamsources.fabel.dk
669probes.dnsbl.net.au
571dnsbl.sorbs.net (result 127.0.0.6 = spam source)
565pss.spambusters.org.ar
561relays.visi.com
554rmst.dnsbl.net.au
549ybl.megacity.org
537blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
447dnsbl.njabl.org (result 127.0.0.4 = spam source)
439spamguard.leadmon.net (union of all results)
437opm.blitzed.org
432spamguard.leadmon.net (result 127.0.0.2 = dialup)
422blacklist.spambag.org
374work.drbl.croco.net
369dnsbl.ahbl.org (result 127.0.0.4 = spam source)
351blackholes.intersil.net
333cw.blackholes.us
324comcast.blackholes.us
295rr.blackholes.us
294level3.blackholes.us
268relaywatcher.n13mbl.com
243brazil.blackholes.us
214taiwan.blackholes.us
207no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
195dnsbl.njabl.org (result 127.0.0.2 = source or relay)
192ricn.dnsbl.net.au
169no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
160japan.blackholes.us
160dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
160blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
160dialup.blacklist.jippg.org (union of all results)
134wanadoo-fr.blackholes.us
123mail-abuse.blacklist.jippg.org
1223y.spam.mrs.kithrup.com
120charter.blackholes.us
118qwest.blackholes.us
116rogers.blackholes.us
115dnsbl.antispam.or.id
109multihop.dsbl.org
106relays.ordb.org
98dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
93mexico.blackholes.us
88verio.blackholes.us
88ohps.dnsbl.net.au
86interbusiness.blackholes.us
86hongkong.blackholes.us
84singapore.blackholes.us
84sbbl.they.com
83tr.countries.nerd.dk
82turkey.blackholes.us
80flowgoaway.com
76osps.dnsbl.net.au
74internap.blackholes.us
74query.bondedsender.org (not a blacklist!)
73dun.dnsrbl.net
70russia.blackholes.us
69argentina.blackholes.us
66xo.blackholes.us
62dnsbl.sorbs.net (result 127.0.0.5 = open relay)
57above.blackholes.us
56dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
53relays.nether.net
48osrs.dnsbl.net.au
47relays.bl.kundenserver.de
43bellsouth.blackholes.us
38a2000.blackholes.us
38blackholes.uceb.org (union of all results)
33inflow.blackholes.us
33rdts.dnsbl.net.au
33spam.exsilia.net (union of all results)
31infolink.blackholes.us
30he.blackholes.us
28blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
27telstra.blackholes.us
25cybercon.blackholes.us
25exemptions.ahbl.org (not a blacklist!)
24blackholes.brainerd.net
23malaysia.blackholes.us
23covad.blackholes.us
20thailand.blackholes.us
20blackholes.uceb.org (result 127.0.0.3 = spam source)
20blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
19spam.exsilia.net (result 127.0.0.2 = spam source)
18ph.rbl.cluecentral.net
17satos.rbl.cluecentral.net
15nigeria.blackholes.us
14broadwing.blackholes.us
14blackholes.uceb.org (result 127.0.0.2 = open relay)
14spam.exsilia.net (result 127.0.0.3 = virus source)
13yipes.blackholes.us
11eli.blackholes.us
11no-more-funn.moensted.dk (result 127.0.0.9 = misc)
10rackspace.blackholes.us
10pajo.blackholes.us
10owps.dnsbl.net.au
7burst.blackholes.us
7spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
6swbell.blackholes.us
6blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
5blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
5bl.deadbeef.com
5dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
4maxim.blackholes.us
4no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
3epoch.blackholes.us
3affinity.blackholes.us
3blackholes.uceb.org (result 127.0.0.4 = spam source network)
3omrs.dnsbl.net.au
2spamsources.yamta.org (result 127.0.0.2 = spam source)
2navisite.blackholes.us
2dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
2dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
2blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
1olm.blackholes.us
1blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
1t3direct.dnsbl.net.au
1dev.null.dk
1blackholes.five-ten-sg.com (result 127.0.0.6 = 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
15059(total number of IP addresses whose names were tested, including 264 at SDSC)
7684(union of all domain zones)
5772abuse.rfc-ignorant.org
4299rddn.dnsbl.net.au
1011whois.rfc-ignorant.org (union of all results)
819blackhole.securitysage.com
577whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
434whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
319bulk.rhs.mailpolice.com
138bl.deadbeef.com
130rhsbl.ahbl.org
32porn.rhs.mailpolice.com
8postmaster.rfc-ignorant.org
8dsn.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
7933(total number of domains tested, including 166 at SDSC)
2398(union of all domain zones)
825abuse.rfc-ignorant.org
777whois.rfc-ignorant.org (union of all results)
656whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
508blackhole.securitysage.com
474dsn.rfc-ignorant.org
455postmaster.rfc-ignorant.org
274rhsbl.ahbl.org
121whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
67bl.deadbeef.com
30ex.dnsbl.org (union of all results)
28ex.dnsbl.org (result 127.0.0.2 = spamsites)
12rddn.dnsbl.net.au (zone not intended for this use)
9rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
9rhsbl.sorbs.net (union of all results)
2ex.dnsbl.org (result 127.0.0.3 = spam source)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 10 January 2004.