Blacklists Compared

11 January 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
9446(total number of IP addresses tested, including 552 at SDSC)
5897(union of most IP zones)
4184xbl.selwerd.cx
3301blackholes.five-ten-sg.com (union of all results)
2155blackholes.wirehub.net
2001relays.osirusoft.com (union of all results)
1727no-more-funn.moensted.dk (union of all results)
1685bl.spamcop.net
1588block.blars.org
1245unconfirmed.dsbl.org
1235assholes.madscience.nl
1130ztl.dorkslayers.com
1075blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
1056blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
1054blackholes.intersil.net
1011list.dsbl.org
984relays.osirusoft.com (result 127.0.0.4 = spam source)
888dnsbl.njabl.org (union of all results)
882sbl.spamhaus.org
879cn-kr.blackholes.us (union of all results)
878no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
855spamhaus.relays.osirusoft.com
819spews.bl.reynolds.net.au
814spews.relays.osirusoft.com
804relays.osirusoft.com (result 127.0.0.6 = spamsites)
776dnsbl.sorbs.net (union of all results)
749blackholes.five-ten-sg.com (result 127.0.0.3 = dialup)
696ipwhois.rfc-ignorant.org
673cw.blackholes.us
644t1.bl.reynolds.net.au
617dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
554proxies.relays.monkeys.com
544spam.dnsrbl.net
542dnsbl.njabl.org (result 127.0.0.4 = spam source)
532blocktest.relays.osirusoft.com (not a blacklist!)
526cn-kr.blackholes.us (result 127.0.0.3 = Korea)
526korea.blackholes.us
523korea.services.net
509work.drbl.croco.net
477opm.blitzed.org
469blackholes.uceb.org (union of all results)
427ybl.megacity.org
420relays.osirusoft.com (result 127.0.0.9 = open proxy)
412socks.relays.osirusoft.com
409http.opm.blitzed.org
399spamsources.fabel.dk
353cn-kr.blackholes.us (result 127.0.0.2 = China)
353china.blackholes.us
333blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
326no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
318spamsources.relays.osirusoft.com (union of all results)
315blacklist.spambag.org
304spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
302spam.wytnij.to
302dnsbl.delink.net
288dnsbl.njabl.org (result 127.0.0.2 = source or relay)
270blackholes.uceb.org (result 127.0.0.4 = spam organization)
257no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
251relays.osirusoft.com (result 127.0.0.2 = relay)
251inputs.relays.osirusoft.com
241dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
232rackspace.blackholes.us
224mail-abuse.blacklist.jippg.org
219flowgoaway.com
208multihop.dsbl.org
187no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
185brazil.blackholes.us
1793y.spam.mrs.kithrup.com
152relays.bl.kundenserver.de
151blackholes.uceb.org (result 127.0.0.3 = spam source)
148verio.blackholes.us
138relays.ordb.org
117taiwan.blackholes.us
112internap.blackholes.us
112socks.opm.blitzed.org
88spamguard.leadmon.net (union of all results)
87dun.dnsrbl.net
85vox.schpider.com
84blackhole.compu.net
83xo.blackholes.us
80spamguard.leadmon.net (result 127.0.0.2 = dialup)
79rr.blackholes.us
75orbs.dorkslayers.com
74dynablock.wirehub.net (result 127.0.0.2 = dialup)
74level3.blackholes.us
74dynablock.wirehub.net (union of all results)
67japan.blackholes.us
64blackholes.uceb.org (result 127.0.0.2 = relay)
60blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
55tr.countries.nerd.dk
55dialups.relays.osirusoft.com (union of all results)
51dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
50formmail.relays.monkeys.com
47dnsbl.njabl.org (result 127.0.0.3 = dialup)
45dialups.visi.com
44hongkong.blackholes.us
44argentina.blackholes.us
39relays.osirusoft.com (result 127.0.0.3 = dialup)
33dnsbl.sorbs.net (result 127.0.0.6 = spam source)
32inflow.blackholes.us
32inflow.noflow.org
30interbusiness.blackholes.us
29spammers.v6net.org
29no-more-funn.moensted.dk (result 127.0.0.9 = misc)
29spam.exsilia.net (union of all results)
28proxies.relays.osirusoft.com
28spam.exsilia.net (result 127.0.0.2 = spam source)
27russia.blackholes.us
25cybercon.blackholes.us
23singapore.blackholes.us
23no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
22above.blackholes.us
19dev.null.dk
18blackholes.brainerd.net
16no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
16relays.dorkslayers.com
15blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
14nigeria.blackholes.us
14he.blackholes.us
14ph.rbl.cluecentral.net
13broadwing.blackholes.us
13blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
12valuenet.blackholes.us
12pajo.blackholes.us
12dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
11eli.blackholes.us
11spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
10thailand.blackholes.us
10malaysia.blackholes.us
10ciberlynx.blackholes.us
10dnsbl.njabl.org (result 127.0.0.9 = open proxy)
10no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
9covad.blackholes.us
7yipes.blackholes.us
7epoch.blackholes.us
7spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
6wanadoo-fr.blackholes.us
5valueweb.blackholes.us
5affinity.blackholes.us
5proxies.exsilia.net
4spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
4relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
4dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
3spamsites.relays.osirusoft.com (result 127.0.0.6)
3dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
3spamsites.relays.osirusoft.com (union of all results)
3dialup.blacklist.jippg.org (union of all results)
2wingate.opm.blitzed.org
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1no-more-funn.moensted.dk (result 127.0.0.11 = repeated probes)
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
9446(total number of IP addresses whose names were tested, including 552 at SDSC)
1608(union of all domain zones)
1331abuse.rfc-ignorant.org
940whois.rfc-ignorant.org (union of all results)
708whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
232whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
8postmaster.rfc-ignorant.org
8dsn.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
6173(total number of domains tested, including 195 at SDSC)
936(union of all domain zones)
476abuse.rfc-ignorant.org
308whois.rfc-ignorant.org (union of all results)
267postmaster.rfc-ignorant.org
221whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
166dsn.rfc-ignorant.org
87whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
27ex.dnsbl.org (union of all results)
21ex.dnsbl.org (result 127.0.0.2 = spamsites)
9bandwidth-pigs.monkeys.com
6ex.dnsbl.org (result 127.0.0.3 = spam source)
5in.dnsbl.org (union of all results)
3in.dnsbl.org (result 127.0.0.2 = spam source)
2in.dnsbl.org (result 127.0.0.6 = unconfirmed opt-in)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 13 January 2003.