Blacklists Compared

28 August 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
31722(total number of IP addresses tested, including 401 at SDSC)
25099(union of most IP zones)
18936t1.dnsbl.net.au
17971block.blars.org
16346blackholes.five-ten-sg.com (union of all results)
15536blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
12968sbl-xbl.spamhaus.org (union of all results)
12680dnsbl.sorbs.net (union of all results)
11716xbl.spamhaus.org (union of all results)
11667cbl.abuseat.org
11656xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
11656sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
8593unconfirmed.dsbl.org
8582dynablock.njabl.org
8518dnsbl.sorbs.net (result 127.0.0.10 = dialup)
8462dsbl.dnsbl.net.au
8462list.dsbl.org
7859no-more-funn.moensted.dk (union of all results)
6620cn-kr.blackholes.us (union of all results)
4452ipwhois.rfc-ignorant.org
4075no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
4042cn-kr.blackholes.us (result 127.0.0.3 = Korea)
4042korea.blackholes.us
4040korea.services.net
3973dnsbl.njabl.org (union of all results)
3899psbl.surriel.com
3875bl.spamcop.net
3783rmst.dnsbl.net.au
3768sbl.csma.biz
3069dnsbl.ahbl.org (union of all results)
2891l2.spews.dnsbl.sorbs.net
2867blacklist.spambag.org
2779wpbl.dnsbl.net.au
2578cn-kr.blackholes.us (result 127.0.0.2 = China)
2578china.blackholes.us
2421dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2407l1.spews.dnsbl.sorbs.net
2405spews.dnsbl.net.au
1997ricn.dnsbl.net.au
1988dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1950no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1886spamsources.fabel.dk
1832pdl.blackholes.us
1832dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1680dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1375sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1374sbl.spamhaus.org
1339bl.csma.biz
1279dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1226unsure.nether.net
1199spam.wytnij.to
1198dnsbl.njabl.org (result 127.0.0.3 = dialup)
1117opm.blitzed.org
1112xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1111sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1007dnsbl.ahbl.org (result 127.0.0.4 = spam source)
1005work.drbl.croco.net
811japan.blackholes.us
806no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
786level3.blackholes.us
782brazil.blackholes.us
747no-more-funn.moensted.dk (result 127.0.0.9 = misc)
653dun.dnsrbl.net
637spamguard.leadmon.net (union of all results)
595spamguard.leadmon.net (result 127.0.0.2 = dialup)
591taiwan.blackholes.us
555ybl.megacity.org
531dnsbl.rangers.eu.org (union of all results)
499probes.dnsbl.net.au
487blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
461comcast.blackholes.us
437cw.blackholes.us
346dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
342rr.blackholes.us
341charter.blackholes.us
314no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
306dnsbl.rangers.eu.org (result 127.0.0.2 = dialup)
301dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
271mexico.blackholes.us
261russia.blackholes.us
259hongkong.blackholes.us
242qwest.blackholes.us
234blackholes.intersil.net
220blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
215interbusiness.blackholes.us
207dnsbl.antispam.or.id
202dnsbl.njabl.org (result 127.0.0.2 = source or relay)
184verio.blackholes.us
184argentina.blackholes.us
171dnsbl.njabl.org (result 127.0.0.4 = spam source)
170relays.ordb.org
157xo.blackholes.us
156ohps.dnsbl.net.au
155dnsbl.rangers.eu.org (result 127.0.0.16 = spam haven)
149tr.countries.nerd.dk
145turkey.blackholes.us
133flowgoaway.com
129wanadoo-fr.blackholes.us
117malaysia.blackholes.us
116multihop.dsbl.org
111dialup.blacklist.jippg.org (union of all results)
110infolink.blackholes.us
108osps.dnsbl.net.au
107singapore.blackholes.us
106dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
100query.bondedsender.org (not a blacklist!)
96internap.blackholes.us
75osrs.dnsbl.net.au
72bellsouth.blackholes.us
72relays.nether.net
70above.blackholes.us
70dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
65thailand.blackholes.us
58covad.blackholes.us
55dnsbl.rangers.eu.org (result 127.0.0.8 = spam source)
54mail-abuse.blacklist.jippg.org
53relays.visi.com
48rogers.blackholes.us
47ph.rbl.cluecentral.net
46cybercon.blackholes.us
45he.blackholes.us
43inflow.blackholes.us
41spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
39blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
38dnsbl.sorbs.net (result 127.0.0.5 = open relay)
35telstra.blackholes.us
34eli.blackholes.us
33yipes.blackholes.us
33dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
32blackholes.brainerd.net
29rackspace.blackholes.us
29blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
28swbell.blackholes.us
28exemptions.ahbl.org (not a blacklist!)
26blackholes.uceb.org (union of all results)
23hil.habeas.com
22olm.blackholes.us
21rdts.dnsbl.net.au
20blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
19broadwing.blackholes.us
18nigeria.blackholes.us
17maxim.blackholes.us
16dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
14a2000.blackholes.us
14blackholes.uceb.org (result 127.0.0.2 = open relay)
14dnsbl.rangers.eu.org (result 127.0.0.4 = virus notices)
14satos.rbl.cluecentral.net
13navisite.blackholes.us
13affinity.blackholes.us
11blackholes.uceb.org (result 127.0.0.3 = spam source)
11blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
10pajo.blackholes.us
10epoch.blackholes.us
10sbbl.they.com
10relays.bl.kundenserver.de
9burst.blackholes.us
9bl.deadbeef.com
6dnsbl.ahbl.org (result 127.0.0.15 = open relay)
5dialup.blacklist.jippg.org (result 127.0.0.4 = dialup in Japan)
4ciberlynx.blackholes.us
4omrs.dnsbl.net.au
4no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
4no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
3owps.dnsbl.net.au
3no-more-funn.moensted.dk (result 127.0.0.11 = repeated probes)
3spam.dnsrbl.net
2dev.null.dk
2blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
2dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)
1blackholes.uceb.org (result 127.0.0.6 = spam haven)
1dnsbl.rangers.eu.org (result 127.0.0.32 = worm source)
1spamsites.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 127.0.0.11 = TCPA violator)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
1dnsbl.ahbl.org (result 127.0.0.18 = virus source)

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
31722(total number of IP addresses whose names were tested, including 401 at SDSC)
13703(union of all domain zones)
10155abuse.rfc-ignorant.org
7295rddn.dnsbl.net.au
4251whois.rfc-ignorant.org (union of all results)
2780whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
1471whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
790bulk.rhs.mailpolice.com
704rhsbl.ahbl.org
320bl.deadbeef.com
148blackhole.securitysage.com
26postmaster.rfc-ignorant.org
17porn.rhs.mailpolice.com
16dsn.rfc-ignorant.org (zone not intended for this use)
2bogusmx.rfc-ignorant.org

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

HitsDNS Zone
26093(total number of domains tested, including 271 at SDSC)
8551(union of all domain zones)
4089whois.rfc-ignorant.org (union of all results)
3645whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2430abuse.rfc-ignorant.org
1372bulk.rhs.mailpolice.com
1105postmaster.rfc-ignorant.org
947rhsbl.ahbl.org
880dsn.rfc-ignorant.org
444whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
291bogusmx.rfc-ignorant.org
250bl.deadbeef.com
173blackhole.securitysage.com
67porn.rhs.mailpolice.com
62ex.dnsbl.org (union of all results)
59ex.dnsbl.org (result 127.0.0.2 = spamsites)
38rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
38rhsbl.sorbs.net (union of all results)
22rddn.dnsbl.net.au (zone not intended for this use)
3rhsbl.sorbs.net (result 127.0.0.12 = domain does not send mail)
3ex.dnsbl.org (result 127.0.0.3 = spam source)
2cart00ney.surriel.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 9 September 2004.