Blacklists Compared

1 March 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 zone because it is too aggressive to be widely useful, and excludes the blocktest.relays.osirusoft.com zone because it is not a blacklist.

HitsDNS Zone
10604(total number of IP addresses tested, including 455 at SDSC)
7050(union of most IP zones)
5153xbl.selwerd.cx
3867blackholes.five-ten-sg.com (union of all results)
3263t1.bl.reynolds.net.au
2607blackholes.wirehub.net
2295no-more-funn.moensted.dk (union of all results)
2146relays.osirusoft.com (union of all results)
2078block.blars.org
1972unconfirmed.dsbl.org
1923dnsbl.njabl.org (union of all results)
1640list.dsbl.org
1406bl.spamcop.net
1326proxies.blackholes.wirehub.net
1252proxies.relays.monkeys.com (result 127.0.0.2 = open proxy)
1252proxies.relays.monkeys.com (union of all results)
1235dnsbl.sorbs.net (union of all results)
1212blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
1140ztl.dorkslayers.com
1120no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1105blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
1095blackholes.five-ten-sg.com (result 127.0.0.3 = dialup)
1029cn-kr.blackholes.us (union of all results)
920spamhaus.relays.osirusoft.com
913opm.blitzed.org
900blackholes.intersil.net
870relays.osirusoft.com (result 127.0.0.6 = spamsites)
862spews.bl.reynolds.net.au
857sbl.spamhaus.org
842dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
836relays.osirusoft.com (result 127.0.0.4 = spam source)
825spews.relays.osirusoft.com
820blocktest.relays.osirusoft.com (not a blacklist!)
816ipwhois.rfc-ignorant.org
746dnsbl.njabl.org (result 127.0.0.9 = open proxy)
730dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
637no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
610assholes.madscience.nl
598cw.blackholes.us
594dnsbl.njabl.org (result 127.0.0.4 = spam source)
581spam.dnsrbl.net
571work.drbl.croco.net
565ybl.megacity.org
534cn-kr.blackholes.us (result 127.0.0.3 = Korea)
534korea.blackholes.us
523korea.services.net
495cn-kr.blackholes.us (result 127.0.0.2 = China)
495china.blackholes.us
477blackholes.uceb.org (union of all results)
430relays.osirusoft.com (result 127.0.0.9 = open proxy)
426dnsbl.njabl.org (result 127.0.0.2 = source or relay)
412socks.relays.osirusoft.com
398spamsources.fabel.dk
343blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
339dnsbl.delink.net
336spam.wytnij.to
305blacklist.spambag.org
303no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
289relays.osirusoft.com (result 127.0.0.2 = relay)
289inputs.relays.osirusoft.com
279multihop.dsbl.org
255mail-abuse.blacklist.jippg.org
249blackholes.uceb.org (result 127.0.0.4 = spam organization)
243relays.bl.kundenserver.de
216flowgoaway.com
203brazil.blackholes.us
180relays.ordb.org
176rackspace.blackholes.us
1633y.spam.mrs.kithrup.com
161verio.blackholes.us
156spamguard.leadmon.net (union of all results)
155blackholes.uceb.org (result 127.0.0.3 = spam source)
154dnsbl.njabl.org (result 127.0.0.3 = dialup)
151spamsources.relays.osirusoft.com (union of all results)
150dynablock.wirehub.net (result 127.0.0.2 = dialup)
150dynablock.wirehub.net (union of all results)
145spamguard.leadmon.net (result 127.0.0.2 = dialup)
138spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
133dun.dnsrbl.net
130rr.blackholes.us
121dialups.relays.osirusoft.com (union of all results)
112internap.blackholes.us
112dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
110vox.schpider.com
105orbs.dorkslayers.com
102dialups.visi.com
101taiwan.blackholes.us
99no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
92relays.osirusoft.com (result 127.0.0.3 = dialup)
90blackholes.uceb.org (result 127.0.0.2 = relay)
85blackhole.compu.net
76level3.blackholes.us
76no-more-funn.moensted.dk (result 127.0.0.9 = misc)
74xo.blackholes.us
73blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
71japan.blackholes.us
63russia.blackholes.us
62blackholes.brainerd.net
58interbusiness.blackholes.us
54argentina.blackholes.us
44spam.exsilia.net (result 127.0.0.2 = spam source)
44spam.exsilia.net (union of all results)
43tr.countries.nerd.dk
42dnsbl.sorbs.net (result 127.0.0.6 = spam source)
40hongkong.blackholes.us
40dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
32inflow.blackholes.us
32inflow.noflow.org
31no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
25he.blackholes.us
24cybercon.blackholes.us
23above.blackholes.us
23proxies.relays.osirusoft.com
22singapore.blackholes.us
21nigeria.blackholes.us
21dev.null.dk
19no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
18ph.rbl.cluecentral.net
17wanadoo-fr.blackholes.us
17covad.blackholes.us
17relays.dorkslayers.com
16spammers.v6net.org
16blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
14eli.blackholes.us
13blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
12valuenet.blackholes.us
12thailand.blackholes.us
12epoch.blackholes.us
11malaysia.blackholes.us
11ciberlynx.blackholes.us
10broadwing.blackholes.us
10dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
10blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
10dialup.blacklist.jippg.org (union of all results)
9spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
9dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
9spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
7no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
6yipes.blackholes.us
6affinity.blackholes.us
5valueweb.blackholes.us
5pajo.blackholes.us
5spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
4relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
3dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
3no-more-funn.moensted.dk (result 127.0.0.11 = repeated probes)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
1spamsites.relays.osirusoft.com (result 127.0.0.6)
1spamsites.relays.osirusoft.com (union of all results)

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
10604(total number of IP addresses whose names were tested, including 455 at SDSC)
2413(union of all domain zones)
1660abuse.rfc-ignorant.org
1489whois.rfc-ignorant.org (union of all results)
1224whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
265whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
11postmaster.rfc-ignorant.org
9dsn.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
7244(total number of domains tested, including 237 at SDSC)
1174(union of all domain zones)
548abuse.rfc-ignorant.org
523whois.rfc-ignorant.org (union of all results)
347whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
260postmaster.rfc-ignorant.org
186dsn.rfc-ignorant.org
176whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
31ex.dnsbl.org (union of all results)
26ex.dnsbl.org (result 127.0.0.2 = spamsites)
6bandwidth-pigs.monkeys.com
6in.dnsbl.org (union of all results)
5ex.dnsbl.org (result 127.0.0.3 = spam source)
3in.dnsbl.org (result 127.0.0.2 = spam source)
3in.dnsbl.org (result 127.0.0.6 = unconfirmed opt-in)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 4 March 2003.