Blacklists Compared

25 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
9450(total number of IP addresses tested, including 406 at SDSC)
5988(union of most IP zones)
4237xbl.selwerd.cx
3381blackholes.five-ten-sg.com (union of all results)
2048blackholes.wirehub.net
1939no-more-funn.moensted.dk (union of all results)
1792relays.osirusoft.com (union of all results)
1617block.blars.org
1214unconfirmed.dsbl.org
1201assholes.madscience.nl
1124bl.spamcop.net
1121ztl.dorkslayers.com
1085blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
1079blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
994list.dsbl.org
979t1.bl.reynolds.net.au
958no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
951blackholes.intersil.net
908cn-kr.blackholes.us (union of all results)
905sbl.spamhaus.org
901relays.osirusoft.com (result 127.0.0.4 = spam source)
839spamhaus.relays.osirusoft.com
817spews.relays.osirusoft.com
816relays.osirusoft.com (result 127.0.0.6 = spamsites)
805dnsbl.njabl.org (union of all results)
785blocktest.relays.osirusoft.com (not a blacklist!)
767blackholes.five-ten-sg.com (result 127.0.0.3 = dialup)
716dnsbl.sorbs.net (union of all results)
702proxies.relays.monkeys.com (union of all results)
701ipwhois.rfc-ignorant.org
698proxies.relays.monkeys.com (result 127.0.0.2 = open proxy)
610cw.blackholes.us
605spam.dnsrbl.net
590opm.blitzed.org
574cn-kr.blackholes.us (result 127.0.0.3 = Korea)
574korea.blackholes.us
568korea.services.net
553dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
517http.opm.blitzed.org
512ybl.megacity.org
501work.drbl.croco.net
420dnsbl.njabl.org (result 127.0.0.4 = spam source)
419spamsources.fabel.dk
392blackholes.uceb.org (union of all results)
380no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
349blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
341spamsources.relays.osirusoft.com (union of all results)
334cn-kr.blackholes.us (result 127.0.0.2 = China)
334china.blackholes.us
327no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
326spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
325dnsbl.njabl.org (result 127.0.0.2 = source or relay)
302blacklist.spambag.org
296dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
284socks.relays.osirusoft.com
282relays.osirusoft.com (result 127.0.0.9 = open proxy)
280spam.wytnij.to
280dnsbl.delink.net
268inputs.relays.osirusoft.com
265relays.osirusoft.com (result 127.0.0.2 = relay)
252rackspace.blackholes.us
249blackholes.uceb.org (result 127.0.0.4 = spam organization)
219flowgoaway.com
215socks.opm.blitzed.org
214mail-abuse.blacklist.jippg.org
204relays.bl.kundenserver.de
181multihop.dsbl.org
177verio.blackholes.us
162no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
160brazil.blackholes.us
160relays.ordb.org
1323y.spam.mrs.kithrup.com
123taiwan.blackholes.us
103spamguard.leadmon.net (union of all results)
101internap.blackholes.us
99blackhole.compu.net
94blackholes.uceb.org (result 127.0.0.3 = spam source)
93dynablock.wirehub.net (result 127.0.0.2 = dialup)
93rr.blackholes.us
93dynablock.wirehub.net (union of all results)
90vox.schpider.com
89spamguard.leadmon.net (result 127.0.0.2 = dialup)
82orbs.dorkslayers.com
82dun.dnsrbl.net
76xo.blackholes.us
75japan.blackholes.us
73blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
73dialups.relays.osirusoft.com (union of all results)
72spam.exsilia.net (result 127.0.0.2 = spam source)
72spam.exsilia.net (union of all results)
71level3.blackholes.us
69dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
64blackholes.uceb.org (result 127.0.0.2 = relay)
61blackholes.brainerd.net
57no-more-funn.moensted.dk (result 127.0.0.9 = misc)
52relays.osirusoft.com (result 127.0.0.3 = dialup)
51dnsbl.njabl.org (result 127.0.0.3 = dialup)
48argentina.blackholes.us
45dialups.visi.com
44interbusiness.blackholes.us
37hongkong.blackholes.us
35dnsbl.sorbs.net (result 127.0.0.6 = spam source)
34russia.blackholes.us
33inflow.blackholes.us
33inflow.noflow.org
31tr.countries.nerd.dk
27singapore.blackholes.us
26formmail.relays.monkeys.com
24no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
23cybercon.blackholes.us
23above.blackholes.us
22eli.blackholes.us
22no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
20spammers.v6net.org
18thailand.blackholes.us
18nigeria.blackholes.us
18proxies.relays.osirusoft.com
17he.blackholes.us
16ciberlynx.blackholes.us
16blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
16relays.dorkslayers.com
16ph.rbl.cluecentral.net
15dev.null.dk
12spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
11wanadoo-fr.blackholes.us
11valuenet.blackholes.us
11epoch.blackholes.us
11wingate.opm.blitzed.org
11blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
10broadwing.blackholes.us
9affinity.blackholes.us
9dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
9dnsbl.njabl.org (result 127.0.0.9 = open proxy)
8pajo.blackholes.us
8malaysia.blackholes.us
8spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
7yipes.blackholes.us
7spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
7no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
6valueweb.blackholes.us
6spamsites.relays.osirusoft.com (result 127.0.0.6)
6relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
6spamsites.relays.osirusoft.com (union of all results)
6dialup.blacklist.jippg.org (union of all results)
5covad.blackholes.us
5dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
4spews.bl.reynolds.net.au
4dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
4proxies.relays.monkeys.com (result 127.0.0.3 = proxy output)
2skynetweb.blackholes.us
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2no-more-funn.moensted.dk (result 127.0.0.11 = repeated probes)
2proxies.exsilia.net
1blackholes.uceb.org (result 127.0.0.5 = dialup)
1dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
1dialup.blacklist.jippg.org (result 127.0.0.4 = dialup in Japan)
1blackholes.five-ten-sg.com (result 127.0.0.6 = relay)

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
9450(total number of IP addresses whose names were tested, including 406 at SDSC)
1645(union of all domain zones)
1297abuse.rfc-ignorant.org
1002whois.rfc-ignorant.org (union of all results)
753whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
249whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
17postmaster.rfc-ignorant.org
17dsn.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
6364(total number of domains tested, including 210 at SDSC)
976(union of all domain zones)
485abuse.rfc-ignorant.org
330whois.rfc-ignorant.org (union of all results)
267postmaster.rfc-ignorant.org
238whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
201dsn.rfc-ignorant.org
92whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
30ex.dnsbl.org (union of all results)
23ex.dnsbl.org (result 127.0.0.2 = spamsites)
7ex.dnsbl.org (result 127.0.0.3 = spam source)
6bandwidth-pigs.monkeys.com
5in.dnsbl.org (union of all results)
4in.dnsbl.org (result 127.0.0.6 = unconfirmed opt-in)
1in.dnsbl.org (result 127.0.0.2 = spam source)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 30 January 2003.