Blacklists Compared

9 November 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
9201(total number of IP addresses tested, including 358 at SDSC)
5778(union of most IP zones)
4169xbl.selwerd.cx
3075blackholes.five-ten-sg.com (union of all results)
1651relays.osirusoft.com (union of all results)
1599blackholes.wirehub.net
1540no-more-funn.moensted.dk (union of all results)
1514block.blars.org
1402bl.spamcop.net
1111work.drbl.croco.net
1095blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
1064ztl.dorkslayers.com
878relays.osirusoft.com (result 127.0.0.4 = spam source)
863cn-kr.blackholes.us (union of all results)
845no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
841blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
796blackholes.intersil.net
770ipwhois.rfc-ignorant.org
758cw.blackholes.us
756dnsbl.njabl.org (union of all results)
749unconfirmed.dsbl.org
638blackholes.five-ten-sg.com (result 127.0.0.3 = dialup)
600spews.relays.osirusoft.com
584proxies.relays.monkeys.com
576spam.dnsrbl.net
571cn-kr.blackholes.us (result 127.0.0.3 = Korea)
571korea.blackholes.us
568korea.services.net
513blackholes.uceb.org (union of all results)
497ybl.megacity.org
443spamsources.relays.osirusoft.com (union of all results)
421list.dsbl.org
415t1.bl.reynolds.net.au
414spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
414dnsbl.njabl.org (result 127.0.0.2 = source or relay)
377blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
372sbl.spamhaus.org
364assholes.madscience.nl
363spamhaus.relays.osirusoft.com
357relays.osirusoft.com (result 127.0.0.6 = spamsites)
336relays.osirusoft.com (result 127.0.0.9 = open proxy)
332socks.relays.osirusoft.com
312blackholes.uceb.org (result 127.0.0.4 = spam organization)
310relays.osirusoft.com (result 127.0.0.2 = relay)
310inputs.relays.osirusoft.com
310no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
302no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
301spamsources.fabel.dk
301multihop.dsbl.org
292cn-kr.blackholes.us (result 127.0.0.2 = China)
292china.blackholes.us
286mail-abuse.blacklist.jippg.org
285spam.wytnij.to
277vox.schpider.com
269dnsbl.njabl.org (result 127.0.0.4 = spam source)
246relays.bl.kundenserver.de
234blacklist.spambag.org
234dnsbl.delink.net
232relays.ordb.org
220verio.blackholes.us
215flowgoaway.com
214relays.visi.com
209opm.blitzed.org
2003y.spam.mrs.kithrup.com
183http.opm.blitzed.org
168brazil.blackholes.us
149orbs.dorkslayers.com
118rackspace.blackholes.us
117blackholes.uceb.org (result 127.0.0.3 = spam source)
112internap.blackholes.us
112dialups.visi.com
107spamguard.leadmon.net (union of all results)
106blackholes.uceb.org (result 127.0.0.2 = relay)
102blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
98taiwan.blackholes.us
94rr.blackholes.us
91dev.null.dk
87blocktest.relays.osirusoft.com (not a blacklist!)
86spamguard.leadmon.net (result 127.0.0.2 = dialup)
80xo.blackholes.us
80blackhole.compu.net
78level3.blackholes.us
78dun.dnsrbl.net
63no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
56socks.opm.blitzed.org
52japan.blackholes.us
51dnsbl.njabl.org (result 127.0.0.3 = dialup)
51formmail.relays.monkeys.com
43dialups.relays.osirusoft.com (union of all results)
41argentina.blackholes.us
40russia.blackholes.us
37inflow.blackholes.us
37inflow.noflow.org
34dynablock.wirehub.net (result 127.0.0.2 = dialup)
34dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
34relays.osirusoft.com (result 127.0.0.3 = dialup)
34dynablock.wirehub.net (union of all results)
33hongkong.blackholes.us
30ciberlynx.blackholes.us
29cybercon.blackholes.us
26yipes.blackholes.us
24above.blackholes.us
23spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
20he.blackholes.us
19spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
19spam.exsilia.net (result 127.0.0.2 = spam source)
19spam.exsilia.net (union of all results)
17eli.blackholes.us
17relays.dorkslayers.com
16interbusiness.blackholes.us
16dnsbl.njabl.org (result 127.0.0.9 = open proxy)
14singapore.blackholes.us
14nigeria.blackholes.us
14malaysia.blackholes.us
13covad.blackholes.us
13blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
12valuenet.blackholes.us
11epoch.blackholes.us
10spammers.v6net.org
10broadwing.blackholes.us
9thailand.blackholes.us
9pajo.blackholes.us
9dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
9no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
9no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
8blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
7wanadoo-fr.blackholes.us
7relays.osirusoft.com (result 127.0.0.5 = relay output)
5spamsources.relays.osirusoft.com (result 127.0.0.9 = unconfirmed opt-in)
5dnsbl.njabl.org (result 127.0.0.5 = relay output)
5dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
5dialup.blacklist.jippg.org (union of all results)
4proxies.relays.osirusoft.com
2spamsites.relays.osirusoft.com (result 127.0.0.6)
2dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2no-more-funn.moensted.dk (result 127.0.0.9 = misc)
2spamsites.relays.osirusoft.com (union of all results)
1skynetweb.blackholes.us
1wingate.opm.blitzed.org
1spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
1relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
1blackholes.five-ten-sg.com (result 127.0.0.6 = relay)
1proxies.exsilia.net

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
9201(total number of IP addresses whose names were tested, including 358 at SDSC)
1764(union of all domain zones)
1358abuse.rfc-ignorant.org
533whois.rfc-ignorant.org (union of all results)
321whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
212whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
10postmaster.rfc-ignorant.org
8dsn.rfc-ignorant.org (zone not intended for this use)
6sender-domain.sjesl.monkeys.com (zone not intended for this use)
5client-domain.sjesl.monkeys.com
4helo-domain.sjesl.monkeys.com (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
6155(total number of domains tested, including 174 at SDSC)
1107(union of all domain zones)
460abuse.rfc-ignorant.org
437whois.rfc-ignorant.org (union of all results)
336whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
207postmaster.rfc-ignorant.org
168sender-domain.sjesl.monkeys.com
116dsn.rfc-ignorant.org
110helo-domain.sjesl.monkeys.com (zone not intended for this use)
101whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
81client-domain.sjesl.monkeys.com (zone not intended for this use)
27ex.dnsbl.org (union of all results)
21ex.dnsbl.org (result 127.0.0.2 = spamsites)
7bandwidth-pigs.monkeys.com
6ex.dnsbl.org (result 127.0.0.3 = spam source)
4in.dnsbl.org (union of all results)
2in.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 12 November 2002.