Blacklists Compared

15 March 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
10818(total number of IP addresses tested, including 443 at SDSC)
7336(union of most IP zones)
5344xbl.selwerd.cx
4032blackholes.five-ten-sg.com (union of all results)
2801t1.bl.reynolds.net.au
2589blackholes.wirehub.net
2341block.blars.org
2287relays.osirusoft.com (union of all results)
2135no-more-funn.moensted.dk (union of all results)
1798dnsbl.njabl.org (union of all results)
1671unconfirmed.dsbl.org
1379list.dsbl.org
1342bl.spamcop.net
1274blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
1184ztl.dorkslayers.com
1169blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
1142dnsbl.sorbs.net (union of all results)
1128no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1114cn-kr.blackholes.us (union of all results)
1102proxies.blackholes.wirehub.net
1099blackholes.intersil.net
1094proxies.relays.monkeys.com (result 127.0.0.2 = open proxy)
1094proxies.relays.monkeys.com (union of all results)
1093blackholes.five-ten-sg.com (result 127.0.0.3 = dialup)
1012sbl.spamhaus.org
1007spamhaus.relays.osirusoft.com
984relays.osirusoft.com (result 127.0.0.6 = spamsites)
887spews.relays.osirusoft.com
878ipwhois.rfc-ignorant.org
846relays.osirusoft.com (result 127.0.0.4 = spam source)
788opm.blitzed.org
783spews.bl.reynolds.net.au
779dnsbl.njabl.org (result 127.0.0.9 = open proxy)
762dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
729dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
687work.drbl.croco.net
658spam.dnsrbl.net
622cw.blackholes.us
578cn-kr.blackholes.us (result 127.0.0.2 = China)
578china.blackholes.us
566ybl.megacity.org
565dnsbl.njabl.org (result 127.0.0.4 = spam source)
536cn-kr.blackholes.us (result 127.0.0.3 = Korea)
536korea.blackholes.us
531korea.services.net
483no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
460spamsources.fabel.dk
427blocktest.relays.osirusoft.com (not a blacklist!)
425assholes.madscience.nl
417blackholes.uceb.org (union of all results)
397rackspace.blackholes.us
377dnsbl.delink.net
362relays.osirusoft.com (result 127.0.0.9 = open proxy)
362blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
359blacklist.spambag.org
355socks.relays.osirusoft.com
346dnsbl.njabl.org (result 127.0.0.2 = source or relay)
330relays.osirusoft.com (result 127.0.0.2 = relay)
330inputs.relays.osirusoft.com
320no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
286spam.wytnij.to
234flowgoaway.com
230multihop.dsbl.org
228blackholes.uceb.org (result 127.0.0.4 = spam source network)
211brazil.blackholes.us
185mail-abuse.blacklist.jippg.org
173verio.blackholes.us
169relays.bl.kundenserver.de
155spamsources.relays.osirusoft.com (union of all results)
151spamguard.leadmon.net (union of all results)
1493y.spam.mrs.kithrup.com
140spamguard.leadmon.net (result 127.0.0.2 = dialup)
139taiwan.blackholes.us
138spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
136internap.blackholes.us
126dun.dnsrbl.net
125dynablock.wirehub.net (result 127.0.0.2 = dialup)
125dynablock.wirehub.net (union of all results)
122bl.deadbeef.com
115blackholes.uceb.org (result 127.0.0.3 = spam source)
111rr.blackholes.us
109relays.ordb.org
100vox.schpider.com
100dnsbl.njabl.org (result 127.0.0.3 = dialup)
96orbs.dorkslayers.com
91xo.blackholes.us
87argentina.blackholes.us
87blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
85no-more-funn.moensted.dk (result 127.0.0.9 = misc)
84level3.blackholes.us
79blackhole.compu.net
79dialups.relays.osirusoft.com (union of all results)
77japan.blackholes.us
74dialups.visi.com
74dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
72blackholes.uceb.org (result 127.0.0.2 = relay)
68no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
64blackholes.brainerd.net
55relays.osirusoft.com (result 127.0.0.3 = dialup)
50hongkong.blackholes.us
46inflow.blackholes.us
46inflow.noflow.org
46spam.exsilia.net (result 127.0.0.2 = spam source)
46spam.exsilia.net (union of all results)
44dnsbl.sorbs.net (result 127.0.0.6 = spam source)
42russia.blackholes.us
40relays.osirusoft.com (result 127.0.0.5 = relay output)
37interbusiness.blackholes.us
35tr.countries.nerd.dk
29he.blackholes.us
29cybercon.blackholes.us
28above.blackholes.us
22eli.blackholes.us
22dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
22no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
21dev.null.dk
21no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
21blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
20singapore.blackholes.us
20covad.blackholes.us
18spammers.v6net.org
18nigeria.blackholes.us
18proxies.relays.osirusoft.com
18relays.dorkslayers.com
16blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
15thailand.blackholes.us
15malaysia.blackholes.us
15broadwing.blackholes.us
15blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
14spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
12valuenet.blackholes.us
11ph.rbl.cluecentral.net
10epoch.blackholes.us
10blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
9spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
9dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
9dialup.blacklist.jippg.org (union of all results)
8yipes.blackholes.us
8ciberlynx.blackholes.us
8dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
6wanadoo-fr.blackholes.us
6pajo.blackholes.us
6affinity.blackholes.us
6no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
5dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
4valueweb.blackholes.us
3spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
3relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2spamsites.relays.osirusoft.com (result 127.0.0.6)
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
2spamsites.relays.osirusoft.com (union of all results)
1skynetweb.blackholes.us
1blackholes.uceb.org (result 127.0.0.5 = dialup)
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
10818(total number of IP addresses whose names were tested, including 443 at SDSC)
2419(union of all domain zones)
1662abuse.rfc-ignorant.org
1520whois.rfc-ignorant.org (union of all results)
1198whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
322whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
15postmaster.rfc-ignorant.org
9dsn.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
7285(total number of domains tested, including 236 at SDSC)
1200(union of all domain zones)
581abuse.rfc-ignorant.org
515whois.rfc-ignorant.org (union of all results)
342whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
260postmaster.rfc-ignorant.org
180dsn.rfc-ignorant.org
173whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
77bl.deadbeef.com
28ex.dnsbl.org (union of all results)
25ex.dnsbl.org (result 127.0.0.2 = spamsites)
7bandwidth-pigs.monkeys.com
4in.dnsbl.org (union of all results)
3ex.dnsbl.org (result 127.0.0.3 = spam source)
3in.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 19 March 2003.