Blacklists Compared

12 April 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
12022(total number of IP addresses tested, including 448 at SDSC)
8209(union of most IP zones)
5794xbl.selwerd.cx
4921blackholes.five-ten-sg.com (union of all results)
3401t1.bl.reynolds.net.au
2816blackholes.wirehub.net
2795block.blars.org
2237no-more-funn.moensted.dk (union of all results)
2071relays.osirusoft.com (union of all results)
1945unconfirmed.dsbl.org
1925dnsbl.njabl.org (union of all results)
1626blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
1581list.dsbl.org
1461blackholes.five-ten-sg.com (result 127.0.0.3 = dialup)
1426dnsbl.sorbs.net (union of all results)
1365blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
1362proxies.blackholes.wirehub.net
1337bl.spamcop.net
1211proxies.relays.monkeys.com (result 127.0.0.2 = open proxy)
1211proxies.relays.monkeys.com (union of all results)
1123no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1103ztl.dorkslayers.com
1092cn-kr.blackholes.us (union of all results)
1042sbl.spamhaus.org
1015spamhaus.relays.osirusoft.com
1010blackholes.intersil.net
979relays.osirusoft.com (result 127.0.0.6 = spamsites)
925dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
906dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
891spews.bl.reynolds.net.au
880spews.relays.osirusoft.com
874relays.osirusoft.com (result 127.0.0.4 = spam source)
868blocktest.relays.osirusoft.com (not a blacklist!)
865dnsbl.njabl.org (result 127.0.0.9 = open proxy)
852opm.blitzed.org
848ipwhois.rfc-ignorant.org
683work.drbl.croco.net
635cw.blackholes.us
622ybl.megacity.org
621dnsbl.njabl.org (result 127.0.0.4 = spam source)
605cn-kr.blackholes.us (result 127.0.0.2 = China)
605china.blackholes.us
596spam.dnsrbl.net
573no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
532dnsbl.delink.net
490korea.services.net
487cn-kr.blackholes.us (result 127.0.0.3 = Korea)
487korea.blackholes.us
468blacklist.spambag.org
463spamsources.fabel.dk
390rackspace.blackholes.us
370blackholes.uceb.org (union of all results)
330no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
324dnsbl.njabl.org (result 127.0.0.2 = source or relay)
323blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
315spam.wytnij.to
289relays.osirusoft.com (result 127.0.0.2 = relay)
289inputs.relays.osirusoft.com
280multihop.dsbl.org
226flowgoaway.com
225level3.blackholes.us
223brazil.blackholes.us
202relays.osirusoft.com (result 127.0.0.9 = open proxy)
198verio.blackholes.us
189spamguard.leadmon.net (union of all results)
185socks.relays.osirusoft.com
173spamguard.leadmon.net (result 127.0.0.2 = dialup)
173mail-abuse.blacklist.jippg.org
168blackholes.uceb.org (result 127.0.0.4 = spam source network)
166spamsources.relays.osirusoft.com (union of all results)
163dun.dnsrbl.net
162relays.bl.kundenserver.de
1533y.spam.mrs.kithrup.com
152taiwan.blackholes.us
146spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
136dynablock.wirehub.net (result 127.0.0.2 = dialup)
136dynablock.wirehub.net (union of all results)
130internap.blackholes.us
126rr.blackholes.us
125blackholes.uceb.org (result 127.0.0.3 = spam source)
114xo.blackholes.us
110dnsbl.njabl.org (result 127.0.0.3 = dialup)
103japan.blackholes.us
101blackhole.compu.net
98bl.deadbeef.com
96dnsbl.sorbs.net (result 127.0.0.6 = spam source)
94blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
90dialups.visi.com
86vox.schpider.com
84dialups.relays.osirusoft.com (union of all results)
83orbs.dorkslayers.com
82dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
80no-more-funn.moensted.dk (result 127.0.0.9 = misc)
72relays.osirusoft.com (result 127.0.0.3 = dialup)
71dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
68hongkong.blackholes.us
66no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
63argentina.blackholes.us
62relays.ordb.org
62blackholes.brainerd.net
59blackholes.uceb.org (result 127.0.0.2 = relay)
52russia.blackholes.us
51spam.exsilia.net (union of all results)
50spam.exsilia.net (result 127.0.0.2 = spam source)
49bl.deadbeef.com
48tr.countries.nerd.dk
43no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
42interbusiness.blackholes.us
42inflow.blackholes.us
35above.blackholes.us
34he.blackholes.us
30singapore.blackholes.us
27blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
26cybercon.blackholes.us
24eli.blackholes.us
23blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
22spammers.v6net.org
20proxies.relays.osirusoft.com
18wanadoo-fr.blackholes.us
17telstra.blackholes.us
17nigeria.blackholes.us
17covad.blackholes.us
17relays.dorkslayers.com
16malaysia.blackholes.us
16epoch.blackholes.us
16broadwing.blackholes.us
16spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
16blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
15no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
15ph.rbl.cluecentral.net
14yipes.blackholes.us
13spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
12valuenet.blackholes.us
10dev.null.dk
10dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
10dialup.blacklist.jippg.org (union of all results)
9thailand.blackholes.us
8blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
7affinity.blackholes.us
7no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
6pajo.blackholes.us
5dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
4spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
3valueweb.blackholes.us
3dnsbl.sorbs.net (result 127.0.0.5 = open relay)
3relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
3spamguard.leadmon.net (result 127.0.0.3 = spam source)
2skynetweb.blackholes.us
2ciberlynx.blackholes.us
2dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
1dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
1blackholes.five-ten-sg.com (result 127.0.0.6 = relay)
1spam.exsilia.net (result 127.0.0.3 = virus source)
1proxies.exsilia.net
1ex.dnsbl.org (result 127.0.0.2 = spamsites)

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
12022(total number of IP addresses whose names were tested, including 448 at SDSC)
2615(union of all domain zones)
2243abuse.rfc-ignorant.org
594whois.rfc-ignorant.org (union of all results)
369whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
226whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
18postmaster.rfc-ignorant.org
12dsn.rfc-ignorant.org (zone not intended for this use)
1ex.dnsbl.org (result 127.0.0.2 = spamsites)
1ex.dnsbl.org (union of all results)

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

HitsDNS Zone
7871(total number of domains tested, including 237 at SDSC)
1235(union of all domain zones)
630abuse.rfc-ignorant.org
405whois.rfc-ignorant.org (union of all results)
310postmaster.rfc-ignorant.org
309whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
245dsn.rfc-ignorant.org
96whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
22bl.deadbeef.com
6bandwidth-pigs.monkeys.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 14 April 2003.