Blacklists Compared

2 October 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
29525(total number of IP addresses tested, including 443 at SDSC)
23891(union of most IP zones)
17957t1.dnsbl.net.au
15705blackholes.five-ten-sg.com (union of all results)
14946blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
12239dnsbl.sorbs.net (union of all results)
11911sbl-xbl.spamhaus.org (union of all results)
10648xbl.spamhaus.org (union of all results)
10625cbl.abuseat.org
10618xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
10618sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
8204dynablock.njabl.org
8038dnsbl.sorbs.net (result 127.0.0.10 = dialup)
7971unconfirmed.dsbl.org
7848list.dsbl.org
7845dsbl.dnsbl.net.au
7620no-more-funn.moensted.dk (union of all results)
6510cn-kr.blackholes.us (union of all results)
4561psbl.surriel.com
4363sbl.csma.biz
4306ipwhois.rfc-ignorant.org
4115cn-kr.blackholes.us (result 127.0.0.3 = Korea)
4115korea.blackholes.us
4109korea.services.net
3981bl.spamcop.net
3955no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
3650rmst.dnsbl.net.au
3541dnsbl.njabl.org (union of all results)
3404blacklist.spambag.org
2891l2.spews.dnsbl.sorbs.net
2857wpbl.dnsbl.net.au
2613dnsbl.ahbl.org (union of all results)
2526l1.spews.dnsbl.sorbs.net
2522spews.dnsbl.net.au
2395cn-kr.blackholes.us (result 127.0.0.2 = China)
2395china.blackholes.us
2293dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2032ricn.dnsbl.net.au
1867no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1728dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1636bl.csma.biz
1581pdl.blackholes.us
1566spamsources.fabel.dk
1541dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1408spam.wytnij.to
1383sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1383sbl.spamhaus.org
1364dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
1210dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1118dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
976dnsbl.ahbl.org (result 127.0.0.4 = spam source)
972dnsbl.njabl.org (result 127.0.0.3 = dialup)
903no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
854work.drbl.croco.net
768bl.spamcannibal.org
752probes.dnsbl.net.au
741opm.blitzed.org
733xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
733sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
718dnsbl.rangers.eu.org (union of all results)
703japan.blackholes.us
680no-more-funn.moensted.dk (result 127.0.0.9 = misc)
673brazil.blackholes.us
668unsure.nether.net
656level3.blackholes.us
603taiwan.blackholes.us
538ybl.megacity.org
519comcast.blackholes.us
494spamguard.leadmon.net (union of all results)
461dnsbl.rangers.eu.org (result 127.0.0.2 = dialup)
449spamguard.leadmon.net (result 127.0.0.2 = dialup)
432blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
401rr.blackholes.us
348cw.blackholes.us
328mexico.blackholes.us
316charter.blackholes.us
311dnsbl.antispam.or.id
256blackholes.intersil.net
236no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
228relaywatcher.n13mbl.com
219qwest.blackholes.us
214blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
201russia.blackholes.us
180interbusiness.blackholes.us
177ohps.dnsbl.net.au
174dnsbl.rangers.eu.org (result 127.0.0.16 = spam haven)
170hongkong.blackholes.us
153tr.countries.nerd.dk
152verio.blackholes.us
151turkey.blackholes.us
149dnsbl.njabl.org (result 127.0.0.2 = source or relay)
144wanadoo-fr.blackholes.us
142block.blars.org
140dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
138dnsbl.njabl.org (result 127.0.0.4 = spam source)
134argentina.blackholes.us
130query.bondedsender.org (not a blacklist!)
124flowgoaway.com
119infolink.blackholes.us
117osps.dnsbl.net.au
109multihop.dsbl.org
107singapore.blackholes.us
100xo.blackholes.us
97internap.blackholes.us
96dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
92thailand.blackholes.us
87malaysia.blackholes.us
75relays.ordb.org
61dnsbl.rangers.eu.org (result 127.0.0.8 = spam source)
59ph.rbl.cluecentral.net
58above.blackholes.us
58blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
54bellsouth.blackholes.us
52dialup.blacklist.jippg.org (union of all results)
50osrs.dnsbl.net.au
49dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
48cybercon.blackholes.us
47he.blackholes.us
45spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
42swbell.blackholes.us
42covad.blackholes.us
40dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
39telstra.blackholes.us
38relays.nether.net
38mail-abuse.blacklist.jippg.org
36inflow.blackholes.us
32blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
30rogers.blackholes.us
28yipes.blackholes.us
27rackspace.blackholes.us
26eli.blackholes.us
26blackholes.brainerd.net
23nigeria.blackholes.us
22dnsbl.sorbs.net (result 127.0.0.5 = open relay)
21rdts.dnsbl.net.au
20dnsbl.rangers.eu.org (result 127.0.0.4 = virus notices)
20hil.habeas.com
20blackholes.uceb.org (union of all results)
19exemptions.ahbl.org (not a blacklist!)
18blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
17maxim.blackholes.us
14affinity.blackholes.us
14a2000.blackholes.us
14satos.rbl.cluecentral.net
10olm.blackholes.us
10broadwing.blackholes.us
10blackholes.uceb.org (result 127.0.0.2 = open relay)
9epoch.blackholes.us
9bl.deadbeef.com
9dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
8blackholes.uceb.org (result 127.0.0.3 = spam source)
7pajo.blackholes.us
7navisite.blackholes.us
7burst.blackholes.us
6owps.dnsbl.net.au
5dnsbl.ahbl.org (result 127.0.0.15 = open relay)
4no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
3spamsites.dnsbl.net.au
3dialup.blacklist.jippg.org (result 127.0.0.4 = dialup in Japan)
3blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
2dnsbl.rangers.eu.org (result 127.0.0.32 = worm source)
2relays.bl.kundenserver.de
2no-more-funn.moensted.dk (result 127.0.0.11 = repeated probes)
2no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
2blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
2dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
1ciberlynx.blackholes.us
1blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
1blackholes.uceb.org (result 127.0.0.6 = spam haven)
1owfs.dnsbl.net.au
1no-more-funn.moensted.dk (result 127.0.0.5 = relay output)

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
29525(total number of IP addresses whose names were tested, including 443 at SDSC)
12912(union of all domain zones)
9593abuse.rfc-ignorant.org
6786rddn.dnsbl.net.au
4584whois.rfc-ignorant.org (union of all results)
2884whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
1700whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
846rhsbl.ahbl.org
769bulk.rhs.mailpolice.com
314bl.deadbeef.com
30porn.rhs.mailpolice.com
23postmaster.rfc-ignorant.org
19dsn.rfc-ignorant.org (zone not intended for this use)
2bogusmx.rfc-ignorant.org
1blackhole.securitysage.com

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

HitsDNS Zone
27506(total number of domains tested, including 328 at SDSC)
10033(union of all domain zones)
5760whois.rfc-ignorant.org (union of all results)
5334whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2388abuse.rfc-ignorant.org
1234bulk.rhs.mailpolice.com
1213rhsbl.ahbl.org
1038postmaster.rfc-ignorant.org
794dsn.rfc-ignorant.org
492blackhole.securitysage.com
426whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
292bogusmx.rfc-ignorant.org
221bl.deadbeef.com
83porn.rhs.mailpolice.com
38rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
38rhsbl.sorbs.net (union of all results)
24rddn.dnsbl.net.au (zone not intended for this use)
15ex.dnsbl.org
3cart00ney.surriel.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 13 October 2004.