Blacklists Compared

21 June 2003

[ 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 xbl.selwerd.cx and block.blars.org zones zone because they are too aggressive to be widely useful, and the blocktest.relays.osirusoft.com and query.bondedsender.org zones are also excluded because they are not blacklists.

HitsDNS Zone
11181(total number of IP addresses tested, including 446 at SDSC)
7616(union of most IP zones)
6074xbl.selwerd.cx
4214t1.bl.reynolds.net.au
3433blackholes.easynet.nl
3280blackholes.five-ten-sg.com (union of all results)
3250wpb.bl.reynolds.net.au
3205block.blars.org
2790relays.osirusoft.com (union of all results)
2744unconfirmed.dsbl.org
2659psbl.surriel.com
2655dnsbl.njabl.org (union of all results)
2589no-more-funn.moensted.dk (union of all results)
2504dsbl.bl.reynolds.net.au
2504list.dsbl.org
2323dnsbl.sorbs.net (union of all results)
2261blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
2212proxies.blackholes.easynet.nl
1881dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1786dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1704proxies.relays.monkeys.com (result 127.0.0.2 = open proxy)
1704proxies.relays.monkeys.com (union of all results)
1678dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1648bl.spamcop.net
1435relays.osirusoft.com (result 127.0.0.9 = open proxy)
1427socks.relays.osirusoft.com
1369cn-kr.blackholes.us (union of all results)
1341no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1092blackhole.compu.net
969ipwhois.rfc-ignorant.org
915opm.blitzed.org
854rddn.bl.reynolds.net.au
848spews.bl.reynolds.net.au
841spews.relays.osirusoft.com
791blocktest.relays.osirusoft.com (not a blacklist!)
782no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
770cn-kr.blackholes.us (result 127.0.0.2 = China)
770china.blackholes.us
761sbl.spamhaus.org
751spamhaus.relays.osirusoft.com
746blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
733relays.osirusoft.com (result 127.0.0.4 = spam source)
664relays.osirusoft.com (result 127.0.0.6 = spamsites)
599cn-kr.blackholes.us (result 127.0.0.3 = Korea)
599korea.blackholes.us
595korea.services.net
573ybl.megacity.org
563unsure.nether.net
556cw.blackholes.us
542dnsbl.njabl.org (result 127.0.0.4 = spam source)
519dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
512blacklist.spambag.org
501spamsources.fabel.dk
474work.drbl.croco.net
470blackholes.intersil.net
414relaywatcher.n13mbl.com
385dnsbl.delink.net
383pdl.bl.reynolds.net.au
376dynablock.easynet.nl (result 127.0.0.2 = dialup)
376wdl.bl.reynolds.net.au
376dynablock.easynet.nl (union of all results)
359spamguard.leadmon.net (union of all results)
343sbbl.they.com
327level3.blackholes.us
311spam.wytnij.to
271spamguard.leadmon.net (result 127.0.0.2 = dialup)
268dnsbl.antispam.or.id
267relays.osirusoft.com (result 127.0.0.2 = open relay)
267inputs.relays.osirusoft.com
261dnsbl.njabl.org (result 127.0.0.2 = source or relay)
244mail-abuse.blacklist.jippg.org
230no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
195blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
186multihop.dsbl.org
180taiwan.blackholes.us
180dialups.visi.com
180dnsbl.njabl.org (result 127.0.0.3 = dialup)
178brazil.blackholes.us
171comcast.blackholes.us
169relays.ordb.org
163lbl.lagengymnastik.dk
163spamsources.relays.osirusoft.com (union of all results)
150blackholes.uceb.org (union of all results)
147spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
134verio.blackholes.us
133query.bondedsender.org (not a blacklist!)
132dialups.relays.osirusoft.com (union of all results)
1293y.spam.mrs.kithrup.com
126dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
116no-more-funn.moensted.dk (result 127.0.0.9 = misc)
113osrs.bl.reynolds.net.au
111rr.blackholes.us
107relays.bl.kundenserver.de
104bl.deadbeef.com
100hongkong.blackholes.us
97ohps.bl.reynolds.net.au
95japan.blackholes.us
94relays.nether.net
88xo.blackholes.us
86charter.blackholes.us
85internap.blackholes.us
78relays.osirusoft.com (result 127.0.0.3 = dialup)
78flowgoaway.com
76blackholes.uceb.org (result 127.0.0.3 = spam source)
76no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
75spamguard.leadmon.net (result 127.0.0.3 = spam source)
74argentina.blackholes.us
74rmst.bl.reynolds.net.au
74osps.bl.reynolds.net.au
73dnsbl.sorbs.net (result 127.0.0.6 = spam source)
70qwest.blackholes.us
65vox.schpider.com
59blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
58bl.deadbeef.com
57russia.blackholes.us
51blackholes.brainerd.net
46blackholes.uceb.org (result 127.0.0.2 = open relay)
46dun.dnsrbl.net
44rogers.blackholes.us
44interbusiness.blackholes.us
41infolink.blackholes.us
41tr.countries.nerd.dk
38proxy.relays.osirusoft.com
37inflow.blackholes.us
37bellsouth.blackholes.us
31rackspace.blackholes.us
31probes.bl.reynolds.net.au
27singapore.blackholes.us
27blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
26cybercon.blackholes.us
26above.blackholes.us
22nigeria.blackholes.us
22no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
21he.blackholes.us
21spam.exsilia.net (union of all results)
20thailand.blackholes.us
19spam.exsilia.net (result 127.0.0.2 = spam source)
17wanadoo-fr.blackholes.us
17covad.blackholes.us
17spam.shri.net
17dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
17no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
17dialup.blacklist.jippg.org (union of all results)
16malaysia.blackholes.us
15a2000.blackholes.us
13broadwing.blackholes.us
13spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
13spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
12yipes.blackholes.us
12telstra.blackholes.us
11valuenet.blackholes.us
11eli.blackholes.us
10ph.rbl.cluecentral.net
9owps.bl.reynolds.net.au
9blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
9blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
7pajo.blackholes.us
6maxim.blackholes.us
6epoch.blackholes.us
6dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
5olm.blackholes.us
5no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
4affinity.blackholes.us
4dnsbl.sorbs.net (result 127.0.0.5 = open relay)
3omrs.bl.reynolds.net.au
3spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
3relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
3dev.null.dk
2burst.blackholes.us
2blackholes.uceb.org (result 127.0.0.4 = spam source network)
1navisite.blackholes.us
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
1t3direct.bl.reynolds.net.au
1spamsites.bl.reynolds.net.au
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
1blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
1spam.exsilia.net (result 127.0.0.3 = virus source)
1spam.exsilia.net (result 127.0.0.4 = open proxy)

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. The blackhole.compu.net zone "is primarily for hosts which were not blocked by other blackhole sites and spammed compu.net."

Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses.

HitsDNS Zone
11181(total number of IP addresses whose names were tested, including 446 at SDSC)
3087(union of all domain zones)
2360abuse.rfc-ignorant.org
854rddn.bl.reynolds.net.au
622whois.rfc-ignorant.org (union of all results)
333whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
289whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
104bl.deadbeef.com
21dsn.rfc-ignorant.org (zone not intended for this use)
12postmaster.rfc-ignorant.org

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

HitsDNS Zone
7249(total number of domains tested, including 223 at SDSC)
1452(union of all domain zones)
717abuse.rfc-ignorant.org
542whois.rfc-ignorant.org (union of all results)
371postmaster.rfc-ignorant.org
366whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
304dsn.rfc-ignorant.org
176whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
91bl.deadbeef.com
31ex.dnsbl.org (union of all results)
28ex.dnsbl.org (result 127.0.0.2 = spamsites)
24rddn.bl.reynolds.net.au (zone not intended for this use)
8bandwidth-pigs.monkeys.com
5in.dnsbl.org (union of all results)
3ex.dnsbl.org (result 127.0.0.3 = spam source)
3in.dnsbl.org (result 127.0.0.6 = unconfirmed opt-in)
2in.dnsbl.org (result 127.0.0.2 = spam source)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 26 June 2003.