Blacklists Compared

3 April 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
26101(total number of IP addresses tested, including 435 at SDSC)
21004(union of most IP zones)
14957t1.dnsbl.net.au
13070blackholes.five-ten-sg.com (union of all results)
12748block.blars.org
11962blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
11222sbl-xbl.spamhaus.org (union of all results)
11008dnsbl.sorbs.net (union of all results)
9976xbl.spamhaus.org (union of all results)
9969cbl.abuseat.org
9954xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
9950sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
7963dynablock.njabl.org
7564dnsbl.sorbs.net (result 127.0.0.10 = dialup)
7301unconfirmed.dsbl.org
7124dsbl.dnsbl.net.au
7124list.dsbl.org
6317no-more-funn.moensted.dk (union of all results)
4400cn-kr.blackholes.us (union of all results)
4326sbl.csma.biz
4200dnsbl.njabl.org (union of all results)
3819bl.spamcop.net
3763ipwhois.rfc-ignorant.org
3246wpbl.dnsbl.net.au
3059psbl.surriel.com
2943no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2925l2.spews.dnsbl.sorbs.net
2550dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2534spews.dnsbl.net.au
2519dnsbl.ahbl.org (union of all results)
2511l1.spews.dnsbl.sorbs.net
2329spam.wytnij.to
2324cn-kr.blackholes.us (result 127.0.0.2 = China)
2324china.blackholes.us
2234pdl.blackholes.us
2076cn-kr.blackholes.us (result 127.0.0.3 = Korea)
2076korea.blackholes.us
2031no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
2021bl.csma.biz
1962korea.services.net
1782dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1691blacklist.spambag.org
1677rmst.dnsbl.net.au
1622dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1538dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1415sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1415sbl.spamhaus.org
1376unsure.nether.net
1342spamsources.fabel.dk
1105dnsbl.njabl.org (result 127.0.0.3 = dialup)
1083relays.visi.com
1066comcast.blackholes.us
1032dnsbl.sorbs.net (result 127.0.0.6 = spam source)
764blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
758spamguard.leadmon.net (union of all results)
750xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
750sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
750opm.blitzed.org
734dnsbl.ahbl.org (result 127.0.0.4 = spam source)
703spamguard.leadmon.net (result 127.0.0.2 = dialup)
652work.drbl.croco.net
647brazil.blackholes.us
615no-more-funn.moensted.dk (result 127.0.0.9 = misc)
602ricn.dnsbl.net.au
597probes.dnsbl.net.au
555pss.spambusters.org.ar
511rr.blackholes.us
474cw.blackholes.us
452no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
416taiwan.blackholes.us
411level3.blackholes.us
410dnsbl.njabl.org (result 127.0.0.4 = spam source)
400ybl.megacity.org
361charter.blackholes.us
348rbl.rangers.eu.org (union of all results)
308blackholes.intersil.net
296wanadoo-fr.blackholes.us
296no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
276dnsbl.antispam.or.id
268japan.blackholes.us
268hil.habeas.com
262mexico.blackholes.us
258blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
227dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
220ohps.dnsbl.net.au
192relays.ordb.org
188osps.dnsbl.net.au
173interbusiness.blackholes.us
171qwest.blackholes.us
171tr.countries.nerd.dk
170turkey.blackholes.us
160multihop.dsbl.org
159verio.blackholes.us
156dnsbl.njabl.org (result 127.0.0.2 = source or relay)
153russia.blackholes.us
151rbl.rangers.eu.org (result 127.0.0.4 = dialup)
144xo.blackholes.us
143hongkong.blackholes.us
131argentina.blackholes.us
128infolink.blackholes.us
106mail-abuse.blacklist.jippg.org
103osrs.dnsbl.net.au
102dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
100dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
100dialup.blacklist.jippg.org (union of all results)
91rbl.rangers.eu.org (result 127.0.0.3 = spam haven)
87singapore.blackholes.us
81malaysia.blackholes.us
74internap.blackholes.us
74relays.nether.net
74flowgoaway.com
72telstra.blackholes.us
72ph.rbl.cluecentral.net
67bellsouth.blackholes.us
633y.spam.mrs.kithrup.com
62query.bondedsender.org (not a blacklist!)
61dun.dnsrbl.net
57dnsbl.sorbs.net (result 127.0.0.5 = open relay)
57rbl.rangers.eu.org (result 127.0.0.2 = spam source)
56dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
56sbbl.they.com
55thailand.blackholes.us
53he.blackholes.us
53spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
50rdts.dnsbl.net.au
49rogers.blackholes.us
42inflow.blackholes.us
38cybercon.blackholes.us
36covad.blackholes.us
35broadwing.blackholes.us
33above.blackholes.us
32blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
32blackholes.uceb.org (union of all results)
30blackholes.brainerd.net
28nigeria.blackholes.us
28rbl.rangers.eu.org (result 127.0.0.10 = virus notices)
26rackspace.blackholes.us
25a2000.blackholes.us
25blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
21swbell.blackholes.us
21blackholes.uceb.org (result 127.0.0.2 = open relay)
21exemptions.ahbl.org (not a blacklist!)
20satos.rbl.cluecentral.net
19rbl.rangers.eu.org (result 127.0.0.1 = misc)
16spamsources.yamta.org (result 127.0.0.2 = spam source)
16blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
16bl.deadbeef.com
14yipes.blackholes.us
11maxim.blackholes.us
11eli.blackholes.us
11blackholes.uceb.org (result 127.0.0.3 = spam source)
11owps.dnsbl.net.au
10olm.blackholes.us
7burst.blackholes.us
6affinity.blackholes.us
6blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
5pajo.blackholes.us
5navisite.blackholes.us
5epoch.blackholes.us
5no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
5blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
4no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
3omrs.dnsbl.net.au
3dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
3relays.bl.kundenserver.de
3dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)
2rbl.rangers.eu.org (result 127.0.0.5 = relay output)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
2dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
1blackholes.uceb.org (result 127.0.0.4 = spam source network)
1owfs.dnsbl.net.au
1dev.null.dk
1no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
1no-more-funn.moensted.dk (result 127.0.0.11 = repeated probes)

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
26101(total number of IP addresses whose names were tested, including 435 at SDSC)
12115(union of all domain zones)
8635abuse.rfc-ignorant.org
7032rddn.dnsbl.net.au
3461whois.rfc-ignorant.org (union of all results)
2330whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
1132whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
612bulk.rhs.mailpolice.com
521rhsbl.ahbl.org
386blackhole.securitysage.com
255bl.deadbeef.com
44porn.rhs.mailpolice.com
18postmaster.rfc-ignorant.org
11dsn.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
22516(total number of domains tested, including 291 at SDSC)
7196(union of all domain zones)
3145whois.rfc-ignorant.org (union of all results)
2791whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2081abuse.rfc-ignorant.org
1442bulk.rhs.mailpolice.com
1202rhsbl.ahbl.org
848postmaster.rfc-ignorant.org
772dsn.rfc-ignorant.org
726blackhole.securitysage.com
354whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
212bogusmx.rfc-ignorant.org
129bl.deadbeef.com
73porn.rhs.mailpolice.com
54ex.dnsbl.org (union of all results)
49ex.dnsbl.org (result 127.0.0.2 = spamsites)
30rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
30rhsbl.sorbs.net (union of all results)
21rddn.dnsbl.net.au (zone not intended for this use)
5ex.dnsbl.org (result 127.0.0.3 = spam source)
3rhsbl.sorbs.net (result 127.0.0.12 = domain does not send mail)
2cart00ney.surriel.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 22 April 2004.