Blacklists Compared

10 July 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
25134(total number of IP addresses tested, including 385 at SDSC)
20253(union of most IP zones)
15571t1.dnsbl.net.au
14482block.blars.org
13035blackholes.five-ten-sg.com (union of all results)
12399blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
12230sbl-xbl.spamhaus.org (union of all results)
11092xbl.spamhaus.org (union of all results)
11056sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
11055xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
11054cbl.abuseat.org
10277dnsbl.sorbs.net (union of all results)
7222dynablock.njabl.org
7084unconfirmed.dsbl.org
6988list.dsbl.org
6987dsbl.dnsbl.net.au
6939dnsbl.sorbs.net (result 127.0.0.10 = dialup)
5932no-more-funn.moensted.dk (union of all results)
5566cn-kr.blackholes.us (union of all results)
3994ipwhois.rfc-ignorant.org
3897sbl.csma.biz
3893bl.spamcop.net
3527dnsbl.njabl.org (union of all results)
3214cn-kr.blackholes.us (result 127.0.0.3 = Korea)
3214korea.blackholes.us
2906korea.services.net
2745dnsbl.ahbl.org (union of all results)
2722no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2617rmst.dnsbl.net.au
2464wpbl.dnsbl.net.au
2427l2.spews.dnsbl.sorbs.net
2352cn-kr.blackholes.us (result 127.0.0.2 = China)
2352china.blackholes.us
2038l1.spews.dnsbl.sorbs.net
2031spews.dnsbl.net.au
1945dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1924blacklist.spambag.org
1793psbl.surriel.com
1726dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1635pdl.blackholes.us
1607no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1537dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1524spamsources.fabel.dk
1374dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1283sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1283sbl.spamhaus.org
1257unsure.nether.net
1175bl.csma.biz
1163dnsbl.njabl.org (result 127.0.0.3 = dialup)
1063spam.wytnij.to
1055ricn.dnsbl.net.au
964xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
964sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
964opm.blitzed.org
949dnsbl.ahbl.org (result 127.0.0.4 = spam source)
909dnsbl.sorbs.net (result 127.0.0.6 = spam source)
771work.drbl.croco.net
729no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
711no-more-funn.moensted.dk (result 127.0.0.9 = misc)
674level3.blackholes.us
652comcast.blackholes.us
618probes.dnsbl.net.au
616dun.dnsrbl.net
576spamguard.leadmon.net (union of all results)
569dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
532ybl.megacity.org
516spamguard.leadmon.net (result 127.0.0.2 = dialup)
511japan.blackholes.us
481brazil.blackholes.us
437cw.blackholes.us
409dnsbl.antispam.or.id
400taiwan.blackholes.us
353blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
336rr.blackholes.us
314relays.visi.com
282charter.blackholes.us
254relays.ordb.org
249blackholes.intersil.net
244dnsbl.njabl.org (result 127.0.0.2 = source or relay)
235dnsbl.rangers.eu.org (union of all results)
206hongkong.blackholes.us
204blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
198turkey.blackholes.us
198tr.countries.nerd.dk
198no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
184dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
178dnsbl.njabl.org (result 127.0.0.4 = spam source)
173dnsbl.rangers.eu.org (result 127.0.0.2 = dialup)
172mexico.blackholes.us
164qwest.blackholes.us
161wanadoo-fr.blackholes.us
136flowgoaway.com
134interbusiness.blackholes.us
132verio.blackholes.us
127russia.blackholes.us
122ohps.dnsbl.net.au
100dialup.blacklist.jippg.org (union of all results)
98dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
97argentina.blackholes.us
91multihop.dsbl.org
89infolink.blackholes.us
82osrs.dnsbl.net.au
80osps.dnsbl.net.au
79xo.blackholes.us
77singapore.blackholes.us
76dnsbl.sorbs.net (result 127.0.0.5 = open relay)
68malaysia.blackholes.us
64relays.nether.net
62internap.blackholes.us
61he.blackholes.us
61dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
60spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
57ph.rbl.cluecentral.net
53mail-abuse.blacklist.jippg.org
46thailand.blackholes.us
45bellsouth.blackholes.us
44dnsbl.rangers.eu.org (result 127.0.0.8 = spam source)
43above.blackholes.us
42rogers.blackholes.us
42cybercon.blackholes.us
41inflow.blackholes.us
39telstra.blackholes.us
34covad.blackholes.us
34spam.dnsrbl.net
31blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
31blackholes.brainerd.net
30blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
30blackholes.uceb.org (union of all results)
27dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
25swbell.blackholes.us
25hil.habeas.com
25query.bondedsender.org (not a blacklist!)
23nigeria.blackholes.us
21eli.blackholes.us
20yipes.blackholes.us
20sbbl.they.com
19rackspace.blackholes.us
18dnsbl.rangers.eu.org (result 127.0.0.4 = virus notices)
17a2000.blackholes.us
17rdts.dnsbl.net.au
16satos.rbl.cluecentral.net
16exemptions.ahbl.org (not a blacklist!)
14blackholes.uceb.org (result 127.0.0.3 = spam source)
13blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
12affinity.blackholes.us
11blackholes.uceb.org (result 127.0.0.2 = open relay)
9epoch.blackholes.us
8bl.deadbeef.com
8dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
7dnsbl.ahbl.org (result 127.0.0.15 = open relay)
6olm.blackholes.us
6burst.blackholes.us
6broadwing.blackholes.us
6dnsbl.ahbl.org (result 127.0.0.11 = no postmaster or abuse e-mail)
5navisite.blackholes.us
5owps.dnsbl.net.au
4pajo.blackholes.us
4relays.bl.kundenserver.de
4blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
3maxim.blackholes.us
2blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
2blackholes.uceb.org (result 127.0.0.6 = spam haven)
2dialup.blacklist.jippg.org (result 127.0.0.4 = dialup in Japan)
2no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
2dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)
1ciberlynx.blackholes.us
1blackholes.uceb.org (result 127.0.0.4 = spam source network)
1spamsites.dnsbl.net.au
1omrs.dnsbl.net.au
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
1no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1dnsbl.ahbl.org (result 127.0.0.17 = worm 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
25134(total number of IP addresses whose names were tested, including 385 at SDSC)
10918(union of all domain zones)
8077abuse.rfc-ignorant.org
6102rddn.dnsbl.net.au
3161whois.rfc-ignorant.org (union of all results)
2053whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
1108whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
713bulk.rhs.mailpolice.com
545rhsbl.ahbl.org
203bl.deadbeef.com
173blackhole.securitysage.com
19dsn.rfc-ignorant.org (zone not intended for this use)
18porn.rhs.mailpolice.com
17postmaster.rfc-ignorant.org
1bogusmx.rfc-ignorant.org

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

HitsDNS Zone
21189(total number of domains tested, including 258 at SDSC)
6778(union of all domain zones)
3122whois.rfc-ignorant.org (union of all results)
2670whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2225abuse.rfc-ignorant.org
1030bulk.rhs.mailpolice.com
961postmaster.rfc-ignorant.org
812rhsbl.ahbl.org
739dsn.rfc-ignorant.org
452whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
340blackhole.securitysage.com
261bogusmx.rfc-ignorant.org
180bl.deadbeef.com
61ex.dnsbl.org (union of all results)
59ex.dnsbl.org (result 127.0.0.2 = spamsites)
56porn.rhs.mailpolice.com
39rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
39rhsbl.sorbs.net (union of all results)
26rddn.dnsbl.net.au (zone not intended for this use)
3rhsbl.sorbs.net (result 127.0.0.12 = domain does not send mail)
3cart00ney.surriel.com
2ex.dnsbl.org (result 127.0.0.3 = spam source)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 18 July 2004.