Blacklists Compared

7 June 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 and block.blars.org zones zone because they are too aggressive to be widely useful, and the blocktest.relays.osirusoft.com and query.bondedsender.org zones are also excluded because they are not blacklists.

HitsDNS Zone
12239(total number of IP addresses tested, including 426 at SDSC)
8069(union of most IP zones)
6457xbl.selwerd.cx
3998t1.bl.reynolds.net.au
3546blackholes.five-ten-sg.com (union of all results)
3334block.blars.org
3053blackholes.easynet.nl
2869wpb.bl.reynolds.net.au
2751unconfirmed.dsbl.org
2742no-more-funn.moensted.dk (union of all results)
2693relays.osirusoft.com (union of all results)
2576dnsbl.njabl.org (union of all results)
2490dsbl.bl.reynolds.net.au
2490list.dsbl.org
2401dnsbl.sorbs.net (union of all results)
2387blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
2065proxies.blackholes.easynet.nl
1928dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1737proxies.relays.monkeys.com (result 127.0.0.2 = open proxy)
1737proxies.relays.monkeys.com (union of all results)
1717dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1662bl.spamcop.net
1639dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1516cn-kr.blackholes.us (union of all results)
1479no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1340relays.osirusoft.com (result 127.0.0.9 = open proxy)
1335socks.relays.osirusoft.com
1192blackhole.compu.net
1083ipwhois.rfc-ignorant.org
926opm.blitzed.org
898blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
894rddn.bl.reynolds.net.au
848cn-kr.blackholes.us (result 127.0.0.2 = China)
848china.blackholes.us
848spews.bl.reynolds.net.au
847spews.relays.osirusoft.com
746relays.osirusoft.com (result 127.0.0.4 = spam source)
746no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
741sbl.spamhaus.org
738spamhaus.relays.osirusoft.com
719blocktest.relays.osirusoft.com (not a blacklist!)
680spam.dnsrbl.net
669relays.osirusoft.com (result 127.0.0.6 = spamsites)
668cn-kr.blackholes.us (result 127.0.0.3 = Korea)
668korea.blackholes.us
656korea.services.net
595blacklist.spambag.org
573spamsources.fabel.dk
555ybl.megacity.org
554cw.blackholes.us
495dnsbl.njabl.org (result 127.0.0.4 = spam source)
471blackholes.intersil.net
470dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
431work.drbl.croco.net
385sbbl.they.com
381dnsbl.delink.net
371spamguard.leadmon.net (union of all results)
336spam.wytnij.to
336pdl.bl.reynolds.net.au
310level3.blackholes.us
297dnsbl.njabl.org (result 127.0.0.2 = source or relay)
288relays.osirusoft.com (result 127.0.0.2 = open relay)
288inputs.relays.osirusoft.com
274mail-abuse.blacklist.jippg.org
273no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
245spamguard.leadmon.net (result 127.0.0.2 = dialup)
241dynablock.easynet.nl (result 127.0.0.2 = dialup)
241dynablock.easynet.nl (union of all results)
240wdl.bl.reynolds.net.au
210comcast.blackholes.us
207multihop.dsbl.org
202dun.dnsrbl.net
196lbl.lagengymnastik.dk
190taiwan.blackholes.us
190relays.ordb.org
188blackholes.uceb.org (union of all results)
183brazil.blackholes.us
173blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
160dialups.relays.osirusoft.com (union of all results)
151dialups.visi.com
146dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
145query.bondedsender.org (not a blacklist!)
144dnsbl.njabl.org (result 127.0.0.3 = dialup)
142verio.blackholes.us
1423y.spam.mrs.kithrup.com
137rr.blackholes.us
137bl.deadbeef.com
135relays.bl.kundenserver.de
132osrs.bl.reynolds.net.au
131ohps.bl.reynolds.net.au
131spamsources.relays.osirusoft.com (union of all results)
124probes.bl.reynolds.net.au
117spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
115spamguard.leadmon.net (result 127.0.0.3 = spam source)
111no-more-funn.moensted.dk (result 127.0.0.9 = misc)
109blackholes.uceb.org (result 127.0.0.3 = spam source)
104dnsbl.sorbs.net (result 127.0.0.6 = spam source)
99osps.bl.reynolds.net.au
98internap.blackholes.us
93japan.blackholes.us
90qwest.blackholes.us
86relays.osirusoft.com (result 127.0.0.3 = dialup)
85hongkong.blackholes.us
85charter.blackholes.us
80flowgoaway.com
74no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
68rmst.bl.reynolds.net.au
66xo.blackholes.us
62vox.schpider.com
60bl.deadbeef.com
59argentina.blackholes.us
55blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
54russia.blackholes.us
51rackspace.blackholes.us
51blackholes.brainerd.net
50singapore.blackholes.us
45bellsouth.blackholes.us
43interbusiness.blackholes.us
40rogers.blackholes.us
39tr.countries.nerd.dk
38blackholes.uceb.org (result 127.0.0.2 = open relay)
35infolink.blackholes.us
35blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
35no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
34proxy.relays.osirusoft.com
32inflow.blackholes.us
27eli.blackholes.us
26nigeria.blackholes.us
26above.blackholes.us
25dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
25dialup.blacklist.jippg.org (union of all results)
24wanadoo-fr.blackholes.us
24he.blackholes.us
23covad.blackholes.us
22thailand.blackholes.us
21malaysia.blackholes.us
21ph.rbl.cluecentral.net
20cybercon.blackholes.us
19telstra.blackholes.us
18no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
18blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
18spam.exsilia.net (union of all results)
16spam.exsilia.net (result 127.0.0.2 = spam source)
14dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
12a2000.blackholes.us
12blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
11spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
11spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
10yipes.blackholes.us
10valuenet.blackholes.us
10broadwing.blackholes.us
9pajo.blackholes.us
9epoch.blackholes.us
9owps.bl.reynolds.net.au
7maxim.blackholes.us
7affinity.blackholes.us
7blackholes.uceb.org (result 127.0.0.4 = spam source network)
5olm.blackholes.us
5burst.blackholes.us
5dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
5no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
3omrs.bl.reynolds.net.au
3spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
3relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
3dev.null.dk
2navisite.blackholes.us
2ciberlynx.blackholes.us
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
1spamsites.bl.reynolds.net.au
1spamsites.relays.osirusoft.com
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
1no-more-funn.moensted.dk (result 127.0.0.11 = repeated probes)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
1spam.exsilia.net (result 127.0.0.3 = virus source)
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
12239(total number of IP addresses whose names were tested, including 426 at SDSC)
3228(union of all domain zones)
2339abuse.rfc-ignorant.org
894rddn.bl.reynolds.net.au
698whois.rfc-ignorant.org (union of all results)
388whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
310whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
137bl.deadbeef.com
25dsn.rfc-ignorant.org (zone not intended for this use)
17postmaster.rfc-ignorant.org

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

HitsDNS Zone
8175(total number of domains tested, including 203 at SDSC)
1569(union of all domain zones)
733abuse.rfc-ignorant.org
646whois.rfc-ignorant.org (union of all results)
486whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
370postmaster.rfc-ignorant.org
315dsn.rfc-ignorant.org
160whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
80bl.deadbeef.com
25ex.dnsbl.org (union of all results)
23ex.dnsbl.org (result 127.0.0.2 = spamsites)
8in.dnsbl.org (union of all results)
7rddn.bl.reynolds.net.au (zone not intended for this use)
6in.dnsbl.org (result 127.0.0.6 = unconfirmed opt-in)
5bandwidth-pigs.monkeys.com
2in.dnsbl.org (result 127.0.0.2 = spam source)
2ex.dnsbl.org (result 127.0.0.3 = spam source)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 12 June 2003.