Blacklists Compared

21 December 2002

[ 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
9934(total number of IP addresses tested, including 433 at SDSC)
6388(union of most IP zones)
4715xbl.selwerd.cx
3707blackholes.five-ten-sg.com (union of all results)
2050blackholes.wirehub.net
2004relays.osirusoft.com (union of all results)
1836no-more-funn.moensted.dk (union of all results)
1807bl.spamcop.net
1557block.blars.org
1301ztl.dorkslayers.com
1256unconfirmed.dsbl.org
1237blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
1231assholes.madscience.nl
1208relays.osirusoft.com (result 127.0.0.4 = spam source)
1166blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
1144blackholes.intersil.net
1051dnsbl.njabl.org (union of all results)
991sbl.spamhaus.org
968list.dsbl.org
881no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
880cn-kr.blackholes.us (union of all results)
872spews.relays.osirusoft.com
819blackholes.five-ten-sg.com (result 127.0.0.3 = dialup)
781blocktest.relays.osirusoft.com (not a blacklist!)
766ipwhois.rfc-ignorant.org
703cw.blackholes.us
648t1.bl.reynolds.net.au
634spam.dnsrbl.net
620dnsbl.sorbs.net (union of all results)
550dnsbl.njabl.org (result 127.0.0.4 = spam source)
524cn-kr.blackholes.us (result 127.0.0.3 = Korea)
524korea.blackholes.us
522korea.services.net
496blackholes.uceb.org (union of all results)
476spamsources.fabel.dk
430spamsources.relays.osirusoft.com (union of all results)
427dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
425relays.osirusoft.com (result 127.0.0.9 = open proxy)
421socks.relays.osirusoft.com
418ybl.megacity.org
415spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
412dnsbl.njabl.org (result 127.0.0.2 = source or relay)
382work.drbl.croco.net
372opm.blitzed.org
368blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
361no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
360relays.osirusoft.com (result 127.0.0.2 = relay)
360inputs.relays.osirusoft.com
360no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
356cn-kr.blackholes.us (result 127.0.0.2 = China)
356china.blackholes.us
350blacklist.spambag.org
341spam.wytnij.to
311blackholes.uceb.org (result 127.0.0.4 = spam organization)
282dnsbl.delink.net
274http.opm.blitzed.org
262relays.bl.kundenserver.de
261multihop.dsbl.org
253mail-abuse.blacklist.jippg.org
245rackspace.blackholes.us
235dynablock.wirehub.net (result 127.0.0.2 = dialup)
235dynablock.wirehub.net (union of all results)
228flowgoaway.com
223dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
205relays.ordb.org
203verio.blackholes.us
199brazil.blackholes.us
1973y.spam.mrs.kithrup.com
169blackhole.compu.net
167internap.blackholes.us
142blackholes.uceb.org (result 127.0.0.3 = spam source)
133socks.opm.blitzed.org
133no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
118taiwan.blackholes.us
112spamguard.leadmon.net (union of all results)
102level3.blackholes.us
99spamguard.leadmon.net (result 127.0.0.2 = dialup)
99dun.dnsrbl.net
94xo.blackholes.us
94blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
90orbs.dorkslayers.com
88rr.blackholes.us
78dnsbl.njabl.org (result 127.0.0.3 = dialup)
71japan.blackholes.us
60blackholes.uceb.org (result 127.0.0.2 = relay)
56dialups.relays.osirusoft.com (union of all results)
54dialups.visi.com
54dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
52vox.schpider.com
50formmail.relays.monkeys.com
48argentina.blackholes.us
45relays.osirusoft.com (result 127.0.0.3 = dialup)
41inflow.blackholes.us
41inflow.noflow.org
40no-more-funn.moensted.dk (result 127.0.0.9 = misc)
39dev.null.dk
38russia.blackholes.us
33eli.blackholes.us
33cybercon.blackholes.us
29yipes.blackholes.us
29no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
28above.blackholes.us
27interbusiness.blackholes.us
27spam.exsilia.net (result 127.0.0.2 = spam source)
27spam.exsilia.net (union of all results)
26hongkong.blackholes.us
25spammers.v6net.org
24singapore.blackholes.us
21no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
20wanadoo-fr.blackholes.us
19dnsbl.sorbs.net (result 127.0.0.6 = spam source)
15nigeria.blackholes.us
15relays.dorkslayers.com
14thailand.blackholes.us
14broadwing.blackholes.us
14blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
13he.blackholes.us
12spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
11valuenet.blackholes.us
11covad.blackholes.us
11dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
11spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
10epoch.blackholes.us
10ciberlynx.blackholes.us
10wingate.opm.blitzed.org
9malaysia.blackholes.us
9no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
9blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
9dialup.blacklist.jippg.org (union of all results)
8valueweb.blackholes.us
8pajo.blackholes.us
8dnsbl.njabl.org (result 127.0.0.9 = open proxy)
7dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
6relays.osirusoft.com (result 127.0.0.6 = spamsites)
5proxies.relays.osirusoft.com
4spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
3relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
3dnsbl.njabl.org (result 127.0.0.5 = relay output)
2skynetweb.blackholes.us
2spamsources.relays.osirusoft.com (result 127.0.0.9 = unconfirmed opt-in)
2spamsites.relays.osirusoft.com (result 127.0.0.6)
2dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
2dialup.blacklist.jippg.org (result 127.0.0.4 = dialup in Japan)
2no-more-funn.moensted.dk (result 127.0.0.11 = repeated probes)
2spamsites.relays.osirusoft.com (union of all results)
1spamguard.leadmon.net (result 127.0.0.3 = spam 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. 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
9934(total number of IP addresses whose names were tested, including 433 at SDSC)
1874(union of all domain zones)
1462abuse.rfc-ignorant.org
536whois.rfc-ignorant.org (union of all results)
329whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
207whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
22dsn.rfc-ignorant.org (zone not intended for this use)
16postmaster.rfc-ignorant.org

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

HitsDNS Zone
6799(total number of domains tested, including 239 at SDSC)
1190(union of all domain zones)
548abuse.rfc-ignorant.org
491whois.rfc-ignorant.org (union of all results)
406whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
251postmaster.rfc-ignorant.org
196dsn.rfc-ignorant.org
85whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
30ex.dnsbl.org (union of all results)
24ex.dnsbl.org (result 127.0.0.2 = spamsites)
7bandwidth-pigs.monkeys.com
6ex.dnsbl.org (result 127.0.0.3 = spam source)
2in.dnsbl.org (union of all results)
1in.dnsbl.org (result 127.0.0.2 = spam source)
1in.dnsbl.org (result 127.0.0.6 = unconfirmed opt-in)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 23 December 2002.