Blacklists Compared

13 December 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 exemptions.ahbl.org and query.bondedsender.org zones because they are not blacklists, and because it is too aggressive to be widely useful the block.blars.org zone is also excluded.

HitsDNS Zone
17762(total number of IP addresses tested, including 443 at SDSC)
13405(union of most IP zones)
8815t1.dnsbl.net.au
8088dnsbl.sorbs.net (union of all results)
7061block.blars.org
6847blackholes.five-ten-sg.com (union of all results)
5769blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
5716dnsbl.sorbs.net (result 127.0.0.10 = dialup)
5033unconfirmed.dsbl.org
4868list.dsbl.org
4867dsbl.dnsbl.net.au
4584cbl.abuseat.org
3633no-more-funn.moensted.dk (union of all results)
3483bl.spamcop.net
3354dnsbl.njabl.org (union of all results)
3095sbl.csma.biz
2094cn-kr.blackholes.us (union of all results)
1722unsure.nether.net
1692no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1593dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1592l2.spews.dnsbl.sorbs.net
1494no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1470dnsbl.ahbl.org (union of all results)
1408pdl.dnsbl.net.au
1308bl.csma.biz
1303dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1293spews.dnsbl.net.au
1292l1.spews.dnsbl.sorbs.net
1291psbl.surriel.com
1262dialups.visi.com
1248ipwhois.rfc-ignorant.org
1224sbl.spamhaus.org
1187cn-kr.blackholes.us (result 127.0.0.2 = China)
1187china.blackholes.us
1036dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
957spam.wytnij.to
946dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
907cn-kr.blackholes.us (result 127.0.0.3 = Korea)
907korea.blackholes.us
896korea.services.net
881dnsbl.njabl.org (result 127.0.0.3 = dialup)
767blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
744spamsources.fabel.dk
689ybl.megacity.org
673dnsbl.njabl.org (result 127.0.0.4 = spam source)
671rmst.dnsbl.net.au
635dnsbl.sorbs.net (result 127.0.0.6 = spam source)
586probes.dnsbl.net.au
583relays.visi.com
545pss.spambusters.org.ar
529comcast.blackholes.us
517cw.blackholes.us
492relaywatcher.n13mbl.com
451work.drbl.croco.net
443blacklist.spambag.org
440spamguard.leadmon.net (union of all results)
434dnsbl.ahbl.org (result 127.0.0.4 = spam source)
429spamguard.leadmon.net (result 127.0.0.2 = dialup)
392blackholes.intersil.net
382rr.blackholes.us
337ricn.dnsbl.net.au
334opm.blitzed.org
323level3.blackholes.us
286brazil.blackholes.us
243no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
242blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
236dnsbl.njabl.org (result 127.0.0.2 = source or relay)
219taiwan.blackholes.us
212charter.blackholes.us
190no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
166relays.ordb.org
163dialup.blacklist.jippg.org (union of all results)
161dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
160xo.blackholes.us
159japan.blackholes.us
1553y.spam.mrs.kithrup.com
153dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
153sbbl.they.com
140dnsbl.antispam.or.id
139multihop.dsbl.org
137qwest.blackholes.us
136mail-abuse.blacklist.jippg.org
132verio.blackholes.us
130mexico.blackholes.us
113internap.blackholes.us
103osrs.dnsbl.net.au
100wanadoo-fr.blackholes.us
100russia.blackholes.us
98query.bondedsender.org (not a blacklist!)
95relays.nether.net
93osps.dnsbl.net.au
91singapore.blackholes.us
90ohps.dnsbl.net.au
86flowgoaway.com
82argentina.blackholes.us
75rdts.dnsbl.net.au
73interbusiness.blackholes.us
69above.blackholes.us
59rogers.blackholes.us
59dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
59dun.dnsrbl.net
57hongkong.blackholes.us
54he.blackholes.us
53turkey.blackholes.us
53tr.countries.nerd.dk
52blackholes.uceb.org (union of all results)
50inflow.blackholes.us
46telstra.blackholes.us
46spam.exsilia.net (union of all results)
43no-more-funn.moensted.dk (result 127.0.0.9 = misc)
41bellsouth.blackholes.us
37covad.blackholes.us
36relays.bl.kundenserver.de
35blackholes.brainerd.net
34nigeria.blackholes.us
32spam.exsilia.net (result 127.0.0.2 = spam source)
31infolink.blackholes.us
31a2000.blackholes.us
30blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
28blackholes.uceb.org (result 127.0.0.3 = spam source)
28exemptions.ahbl.org (not a blacklist!)
24satos.rbl.cluecentral.net
23cybercon.blackholes.us
22ph.rbl.cluecentral.net
21blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
20rackspace.blackholes.us
20dnsbl.sorbs.net (result 127.0.0.5 = open relay)
19yipes.blackholes.us
19blackholes.uceb.org (result 127.0.0.2 = open relay)
18malaysia.blackholes.us
15broadwing.blackholes.us
14eli.blackholes.us
14spam.exsilia.net (result 127.0.0.3 = virus source)
11pajo.blackholes.us
11bl.deadbeef.com
10affinity.blackholes.us
10blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
9thailand.blackholes.us
9burst.blackholes.us
9spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
6olm.blackholes.us
6owps.dnsbl.net.au
6no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
6no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
5spamsources.yamta.org (result 127.0.0.2 = spam source)
5maxim.blackholes.us
5dev.null.dk
4epoch.blackholes.us
4blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
4blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
3blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
3t3direct.dnsbl.net.au
2navisite.blackholes.us
2blackholes.uceb.org (result 127.0.0.4 = spam source network)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2dialup.blacklist.jippg.org (result 127.0.0.4 = dialup in Japan)
1dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
1spamsites.dnsbl.net.au
1omrs.dnsbl.net.au
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
1no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
1dnsbl.ahbl.org (result 127.0.0.2 = open 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.

Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses.

HitsDNS Zone
17762(total number of IP addresses whose names were tested, including 443 at SDSC)
8775(union of all domain zones)
6406abuse.rfc-ignorant.org
4260rddn.dnsbl.net.au
1232whois.rfc-ignorant.org (union of all results)
685whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
683bulk.rhs.mailpolice.com
648blackhole.securitysage.com
547whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
161bl.deadbeef.com
128rhsbl.ahbl.org
113porn.rhs.mailpolice.com
17dsn.rfc-ignorant.org (zone not intended for this use)
16postmaster.rfc-ignorant.org
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
10387(total number of domains tested, including 312 at SDSC)
3677(union of all domain zones)
1335bulk.rhs.mailpolice.com
1035whois.rfc-ignorant.org (union of all results)
974abuse.rfc-ignorant.org
884whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
711blackhole.securitysage.com
519postmaster.rfc-ignorant.org
502dsn.rfc-ignorant.org
151whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
108rhsbl.ahbl.org
70porn.rhs.mailpolice.com
69bl.deadbeef.com
30ex.dnsbl.org (union of all results)
27ex.dnsbl.org (result 127.0.0.2 = spamsites)
19rddn.dnsbl.net.au (zone not intended for this use)
3ex.dnsbl.org (result 127.0.0.3 = spam source)
1rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
1rhsbl.sorbs.net (union of all results)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 22 December 2003.