Blacklists Compared

28 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
11728(total number of IP addresses tested, including 458 at SDSC)
8116(union of most IP zones)
6268xbl.selwerd.cx
4053t1.bl.reynolds.net.au
3481block.blars.org
3465blackholes.five-ten-sg.com (union of all results)
3227blackholes.easynet.nl
2958wpb.bl.reynolds.net.au
2881relays.osirusoft.com (union of all results)
2688no-more-funn.moensted.dk (union of all results)
2495dnsbl.njabl.org (union of all results)
2449unconfirmed.dsbl.org
2407blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
2337psbl.surriel.com
2225dsbl.bl.reynolds.net.au
2225list.dsbl.org
2061dnsbl.sorbs.net (union of all results)
2003proxies.blackholes.easynet.nl
1689dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1591dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1545cn-kr.blackholes.us (union of all results)
1516proxies.relays.monkeys.com (union of all results)
1515proxies.relays.monkeys.com (result 127.0.0.2 = open proxy)
1504no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1496dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1493bl.spamcop.net
1441spam.shri.net
1360relays.osirusoft.com (result 127.0.0.9 = open proxy)
1358socks.relays.osirusoft.com
1124blackhole.compu.net
1036ipwhois.rfc-ignorant.org
991spews.bl.reynolds.net.au
991spews.relays.osirusoft.com
898blocktest.relays.osirusoft.com (not a blacklist!)
873relays.osirusoft.com (result 127.0.0.4 = spam source)
866cn-kr.blackholes.us (result 127.0.0.2 = China)
866china.blackholes.us
860rddn.bl.reynolds.net.au
802sbl.spamhaus.org
795spamhaus.relays.osirusoft.com
795blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
720no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
718relays.osirusoft.com (result 127.0.0.6 = spamsites)
679cn-kr.blackholes.us (result 127.0.0.3 = Korea)
679korea.blackholes.us
675korea.services.net
633opm.blitzed.org
610spamsources.fabel.dk
578unsure.nether.net
577pdl.bl.reynolds.net.au
543ybl.megacity.org
525cw.blackholes.us
519dnsbl.njabl.org (result 127.0.0.4 = spam source)
509blacklist.spambag.org
508blackholes.intersil.net
502dynablock.easynet.nl (result 127.0.0.2 = dialup)
502wdl.bl.reynolds.net.au
502dynablock.easynet.nl (union of all results)
423dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
365dnsbl.delink.net
344work.drbl.croco.net
306spam.wytnij.to
295level3.blackholes.us
292relays.osirusoft.com (result 127.0.0.2 = open relay)
292inputs.relays.osirusoft.com
289dnsbl.njabl.org (result 127.0.0.2 = source or relay)
267no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
237brazil.blackholes.us
234spamguard.leadmon.net (union of all results)
219spamguard.leadmon.net (result 127.0.0.2 = dialup)
204relays.ordb.org
195mail-abuse.blacklist.jippg.org
192dnsbl.njabl.org (result 127.0.0.3 = dialup)
187blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
183taiwan.blackholes.us
179dnsbl.antispam.or.id
174multihop.dsbl.org
173sbbl.they.com
168dialups.visi.com
157lbl.lagengymnastik.dk
148spamsources.relays.osirusoft.com (union of all results)
143verio.blackholes.us
140spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
136query.bondedsender.org (not a blacklist!)
136dialups.relays.osirusoft.com (union of all results)
128dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
127comcast.blackholes.us
125osrs.bl.reynolds.net.au
117blackholes.uceb.org (union of all results)
116relays.bl.kundenserver.de
112relaywatcher.n13mbl.com
107rr.blackholes.us
1063y.spam.mrs.kithrup.com
103dnsbl.sorbs.net (result 127.0.0.6 = spam source)
103bl.deadbeef.com
99ohps.bl.reynolds.net.au
96xo.blackholes.us
96relays.nether.net
96no-more-funn.moensted.dk (result 127.0.0.9 = misc)
95qwest.blackholes.us
95japan.blackholes.us
90internap.blackholes.us
89argentina.blackholes.us
88relays.osirusoft.com (result 127.0.0.3 = dialup)
84hongkong.blackholes.us
78osps.bl.reynolds.net.au
73russia.blackholes.us
72charter.blackholes.us
69flowgoaway.com
68vox.schpider.com
62blackholes.uceb.org (result 127.0.0.3 = spam source)
61blackholes.brainerd.net
60no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
55rmst.bl.reynolds.net.au
52tr.countries.nerd.dk
49bl.deadbeef.com
48infolink.blackholes.us
47blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
40blackholes.uceb.org (result 127.0.0.2 = open relay)
38bellsouth.blackholes.us
36inflow.blackholes.us
36proxy.relays.osirusoft.com
36dun.dnsrbl.net
34probes.bl.reynolds.net.au
31singapore.blackholes.us
27covad.blackholes.us
26thailand.blackholes.us
26he.blackholes.us
26cybercon.blackholes.us
25interbusiness.blackholes.us
24above.blackholes.us
23rackspace.blackholes.us
23nigeria.blackholes.us
21no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
21ph.rbl.cluecentral.net
21spam.exsilia.net (union of all results)
19eli.blackholes.us
19spam.exsilia.net (result 127.0.0.2 = spam source)
18rogers.blackholes.us
17dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
17dialup.blacklist.jippg.org (union of all results)
16telstra.blackholes.us
15wanadoo-fr.blackholes.us
15malaysia.blackholes.us
14spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
14blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
13yipes.blackholes.us
13blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
12blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
12no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
11affinity.blackholes.us
10valuenet.blackholes.us
9broadwing.blackholes.us
8pajo.blackholes.us
8a2000.blackholes.us
8dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
7olm.blackholes.us
7epoch.blackholes.us
7no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
6maxim.blackholes.us
5owps.bl.reynolds.net.au
5spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
4dnsbl.sorbs.net (result 127.0.0.5 = open relay)
4dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
4dev.null.dk
3navisite.blackholes.us
3blackholes.uceb.org (result 127.0.0.4 = spam source network)
3spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
3relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
2burst.blackholes.us
2omrs.bl.reynolds.net.au
2owfs.bl.reynolds.net.au
2spam.exsilia.net (result 127.0.0.3 = virus source)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
1proxies.relays.monkeys.com (result 127.0.0.3 = proxy output)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1no-more-funn.moensted.dk (result 127.0.0.11 = repeated probes)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
1blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)

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
11728(total number of IP addresses whose names were tested, including 458 at SDSC)
3089(union of all domain zones)
2244abuse.rfc-ignorant.org
860rddn.bl.reynolds.net.au
721whois.rfc-ignorant.org (union of all results)
373whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
348whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
103bl.deadbeef.com
24dsn.rfc-ignorant.org (zone not intended for this use)
16postmaster.rfc-ignorant.org

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

HitsDNS Zone
8150(total number of domains tested, including 234 at SDSC)
1600(union of all domain zones)
742abuse.rfc-ignorant.org
607whois.rfc-ignorant.org (union of all results)
451whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
388postmaster.rfc-ignorant.org
335dsn.rfc-ignorant.org
156whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
68bl.deadbeef.com
31ex.dnsbl.org (union of all results)
29ex.dnsbl.org (result 127.0.0.2 = spamsites)
20rddn.bl.reynolds.net.au (zone not intended for this use)
7bandwidth-pigs.monkeys.com
4in.dnsbl.org (union of all results)
3in.dnsbl.org (result 127.0.0.6 = unconfirmed opt-in)
2ex.dnsbl.org (result 127.0.0.3 = spam source)
1in.dnsbl.org (result 127.0.0.2 = spam source)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 4 July 2003.