Blacklists Compared

14 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
28798(total number of IP addresses tested, including 403 at SDSC)
23096(union of most IP zones)
17392t1.dnsbl.net.au
16833block.blars.org
15262blackholes.five-ten-sg.com (union of all results)
14588blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
11641sbl-xbl.spamhaus.org (union of all results)
11252dnsbl.sorbs.net (union of all results)
10459xbl.spamhaus.org (union of all results)
10405cbl.abuseat.org
10388xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
10388sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
8467unconfirmed.dsbl.org
8357list.dsbl.org
8355dsbl.dnsbl.net.au
7960dynablock.njabl.org
7579dnsbl.sorbs.net (result 127.0.0.10 = dialup)
7534no-more-funn.moensted.dk (union of all results)
6658cn-kr.blackholes.us (union of all results)
4456sbl.csma.biz
4381psbl.surriel.com
4361bl.spamcop.net
4204ipwhois.rfc-ignorant.org
4059cn-kr.blackholes.us (result 127.0.0.3 = Korea)
4059korea.blackholes.us
4054korea.services.net
3965dnsbl.njabl.org (union of all results)
3921no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
3486rmst.dnsbl.net.au
3010dnsbl.ahbl.org (union of all results)
2769wpbl.dnsbl.net.au
2599cn-kr.blackholes.us (result 127.0.0.2 = China)
2599china.blackholes.us
2506blacklist.spambag.org
2321dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2288l2.spews.dnsbl.sorbs.net
2164unsure.nether.net
1968ricn.dnsbl.net.au
1915l1.spews.dnsbl.sorbs.net
1911spews.dnsbl.net.au
1868dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1771no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1733spamsources.fabel.dk
1717dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1705pdl.blackholes.us
1575dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1324sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1323sbl.spamhaus.org
1315dnsbl.njabl.org (result 127.0.0.3 = dialup)
1179xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1179sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1177opm.blitzed.org
1160bl.csma.biz
1121dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1100spam.wytnij.to
1007dnsbl.ahbl.org (result 127.0.0.4 = spam source)
944work.drbl.croco.net
937no-more-funn.moensted.dk (result 127.0.0.9 = misc)
835japan.blackholes.us
746brazil.blackholes.us
704no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
682level3.blackholes.us
659probes.dnsbl.net.au
581spamguard.leadmon.net (union of all results)
573ybl.megacity.org
534spamguard.leadmon.net (result 127.0.0.2 = dialup)
487taiwan.blackholes.us
463dun.dnsrbl.net
443cw.blackholes.us
410dnsbl.rangers.eu.org (union of all results)
384blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
325dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
293comcast.blackholes.us
268charter.blackholes.us
266mexico.blackholes.us
258rr.blackholes.us
244dnsbl.antispam.or.id
241dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
234hongkong.blackholes.us
226relays.ordb.org
226no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
222blackholes.intersil.net
212dnsbl.njabl.org (result 127.0.0.2 = source or relay)
211qwest.blackholes.us
207dnsbl.rangers.eu.org (result 127.0.0.2 = dialup)
202blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
186turkey.blackholes.us
185tr.countries.nerd.dk
156interbusiness.blackholes.us
146dnsbl.njabl.org (result 127.0.0.4 = spam source)
144argentina.blackholes.us
136verio.blackholes.us
132wanadoo-fr.blackholes.us
132flowgoaway.com
132dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
131singapore.blackholes.us
131dnsbl.rangers.eu.org (result 127.0.0.16 = spam haven)
127osps.dnsbl.net.au
125relays.visi.com
120russia.blackholes.us
116ohps.dnsbl.net.au
110infolink.blackholes.us
99xo.blackholes.us
97multihop.dsbl.org
81malaysia.blackholes.us
81internap.blackholes.us
80dialup.blacklist.jippg.org (union of all results)
78dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
75query.bondedsender.org (not a blacklist!)
68relays.nether.net
64he.blackholes.us
61ph.rbl.cluecentral.net
56bellsouth.blackholes.us
56above.blackholes.us
56osrs.dnsbl.net.au
49dnsbl.rangers.eu.org (result 127.0.0.8 = spam source)
49mail-abuse.blacklist.jippg.org
47spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
46cybercon.blackholes.us
45covad.blackholes.us
37dnsbl.sorbs.net (result 127.0.0.5 = open relay)
37rdts.dnsbl.net.au
36thailand.blackholes.us
35telstra.blackholes.us
34inflow.blackholes.us
34blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
33rogers.blackholes.us
32swbell.blackholes.us
30blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
29blackholes.brainerd.net
26yipes.blackholes.us
25blackholes.uceb.org (union of all results)
24dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
22rackspace.blackholes.us
22dnsbl.rangers.eu.org (result 127.0.0.4 = virus notices)
21nigeria.blackholes.us
19blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
19exemptions.ahbl.org (not a blacklist!)
18broadwing.blackholes.us
16eli.blackholes.us
15a2000.blackholes.us
15satos.rbl.cluecentral.net
14dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
13sbbl.they.com
13hil.habeas.com
13dnsbl.ahbl.org (result 127.0.0.15 = open relay)
12blackholes.uceb.org (result 127.0.0.3 = spam source)
11navisite.blackholes.us
11epoch.blackholes.us
11blackholes.uceb.org (result 127.0.0.2 = open relay)
9burst.blackholes.us
8olm.blackholes.us
8maxim.blackholes.us
7affinity.blackholes.us
6owps.dnsbl.net.au
6no-more-funn.moensted.dk (result 127.0.0.11 = repeated probes)
5pajo.blackholes.us
4relays.bl.kundenserver.de
4bl.deadbeef.com
3ciberlynx.blackholes.us
3omrs.dnsbl.net.au
3no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
3no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
3dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)
2spamsites.dnsbl.net.au
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)
2blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
2spam.dnsrbl.net
2dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
1blackholes.uceb.org (result 127.0.0.4 = spam source network)
1blackholes.uceb.org (result 127.0.0.6 = spam haven)
1dnsbl.rangers.eu.org (result 127.0.0.32 = worm source)
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)

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
28798(total number of IP addresses whose names were tested, including 403 at SDSC)
12632(union of all domain zones)
9098abuse.rfc-ignorant.org
6740rddn.dnsbl.net.au
3425whois.rfc-ignorant.org (union of all results)
2062whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
1363whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
789bulk.rhs.mailpolice.com
660rhsbl.ahbl.org
271bl.deadbeef.com
172blackhole.securitysage.com
22postmaster.rfc-ignorant.org
21dsn.rfc-ignorant.org (zone not intended for this use)
16porn.rhs.mailpolice.com
3bogusmx.rfc-ignorant.org

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

HitsDNS Zone
27131(total number of domains tested, including 280 at SDSC)
8758(union of all domain zones)
4479whois.rfc-ignorant.org (union of all results)
4005whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2469abuse.rfc-ignorant.org
1314bulk.rhs.mailpolice.com
1018rhsbl.ahbl.org
998postmaster.rfc-ignorant.org
796dsn.rfc-ignorant.org
474whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
379blackhole.securitysage.com
271bogusmx.rfc-ignorant.org
218bl.deadbeef.com
74porn.rhs.mailpolice.com
60ex.dnsbl.org (union of all results)
59ex.dnsbl.org (result 127.0.0.2 = spamsites)
34rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
34rhsbl.sorbs.net (union of all results)
23rddn.dnsbl.net.au (zone not intended for this use)
2rhsbl.sorbs.net (result 127.0.0.12 = domain does not send mail)
2cart00ney.surriel.com
1ex.dnsbl.org (result 127.0.0.3 = spam source)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 24 August 2004.