Blacklists Compared

20 May 2006

[ 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
84328(total number of IP addresses tested, including 501 at SDSC)
74914(union of most IP zones)
54171block.blars.org
44444dnsbl.sorbs.net (union of all results)
38704t1.dnsbl.net.au
35363dnsbl.sorbs.net (result 127.0.0.10 = dialup)
31773sbl-xbl.spamhaus.org (union of all results)
30227xbl.spamhaus.org (union of all results)
29787blackholes.five-ten-sg.com (union of all results)
29003cbl.abuseat.org
28970sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
28968xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
28851blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
27569dynablock.njabl.org
20967cn-kr.blackholes.us (result 127.0.0.2 = China)
20967cn-kr.blackholes.us (union of all results)
16809no-more-funn.moensted.dk (union of all results)
16040china.blackholes.us
15564psbl.surriel.com
15000sbl.csma.biz
11464unconfirmed.dsbl.org
11353list.dsbl.org
11345dsbl.dnsbl.net.au
10633bl.spamcop.net
9771blacklist.spambag.org
9286dnsbl-1.uceprotect.net
7974dnsbl.sorbs.net (result 127.0.0.6 = spam source)
7892dnsbl-2.uceprotect.net
7234bl.csma.biz
6680no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
5878wpbl.dnsbl.net.au
5756no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
5573combined-hib.dnsiplists.completewhois.com (union of all results)
5571combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
5064korea.services.net
4997dnsbl.njabl.org (union of all results)
4922korea.blackholes.us
4710l2.spews.dnsbl.sorbs.net
3899l1.spews.dnsbl.sorbs.net
3838no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
3814unsure.nether.net
3760rmst.dnsbl.net.au
3506dnsbl.njabl.org (result 127.0.0.9 = open proxy)
3492spamsources.fabel.dk
3232dnsbl.ahbl.org (union of all results)
3012dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
2715dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2713brazil.blackholes.us
2678spews.dnsbl.net.au
2583ricn.dnsbl.net.au
2298xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
2298sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
2045sbl.spamhaus.org
2033sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1733turkey.blackholes.us
1731tr.countries.nerd.dk
1699japan.blackholes.us
1570dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1380dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1312mail-abuse.blacklist.jippg.org
1224bl.spamcannibal.org
1214dnsbl.njabl.org (result 127.0.0.3 = dialup)
1189spam.wytnij.to
1150taiwan.blackholes.us
998probes.dnsbl.net.au
838mexico.blackholes.us
827argentina.blackholes.us
825dnsbl-3.uceprotect.net
787russia.blackholes.us
595blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
488dnsbl.ahbl.org (result 127.0.0.4 = spam source)
411dnsbl.antispam.or.id
348malaysia.blackholes.us
314hongkong.blackholes.us
289thailand.blackholes.us
288no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
248no-more-funn.moensted.dk (result 127.0.0.9 = misc)
201singapore.blackholes.us
163query.bondedsender.org (not a blacklist!)
161dnsbl.njabl.org (result 127.0.0.4 = spam source)
156blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
146blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
136blackholes.intersil.net
129work.drbl.croco.net
126dnsbl.njabl.org (result 127.0.0.2 = open relay)
124dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
108relays.ordb.org
106dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
99multihop.dsbl.org
96ohps.dnsbl.net.au
88flowgoaway.com
36osps.dnsbl.net.au
29blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
22relays.nether.net
21dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
17tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
17rdts.dnsbl.net.au
17tor.dnsbl.sectoor.de (union of all results)
16dnsbl.ahbl.org (result 127.0.0.15 = open relay)
15blackholes.uceb.org (union of all results)
13dnsbl.sorbs.net (result 127.0.0.5 = open relay)
12nigeria.blackholes.us
11exemptions.ahbl.org (not a blacklist!)
9spamguard.leadmon.net (union of all results)
7spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
7blackholes.brainerd.net
6blackholes.uceb.org (result 127.0.0.3 = spam source)
6osrs.dnsbl.net.au
6hil.habeas.com
5blackholes.uceb.org (result 127.0.0.2 = open relay)
5owps.dnsbl.net.au
5blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
4vox.schpider.com
4dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
3blackholes.uceb.org (result 127.0.0.5 = dialup)
3blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
3bl.deadbeef.com
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
2combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
1blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
1no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
1dnsbl.ahbl.org (result 127.0.0.18 = virus source)
1dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)

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
84328(total number of IP addresses whose names were tested, including 501 at SDSC)
44756(union of all domain zones)
33429abuse.rfc-ignorant.org
29817rddn.dnsbl.net.au
23304dynamic.rhs.mailpolice.com
21979whois.rfc-ignorant.org (union of all results)
16906whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
5076whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2675webmail.rhs.mailpolice.com
544rhsbl.ahbl.org
538adv.rhs.mailpolice.com
322bl.deadbeef.com
281postmaster.rfc-ignorant.org
126dsn.rfc-ignorant.org (zone not intended for this use)
125bogusmx.rfc-ignorant.org
74bulk.rhs.mailpolice.com
5porn.rhs.mailpolice.com
1blackhole.securitysage.com

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

HitsDNS Zone
50371(total number of domains tested, including 425 at SDSC)
11253(union of all domain zones)
5520whois.rfc-ignorant.org (union of all results)
4891whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3524abuse.rfc-ignorant.org
1690webmail.rhs.mailpolice.com
1270postmaster.rfc-ignorant.org
994rhsbl.ahbl.org
933dsn.rfc-ignorant.org
859bogusmx.rfc-ignorant.org
629whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
343porn.rhs.mailpolice.com
195adv.rhs.mailpolice.com
185bulk.rhs.mailpolice.com
164blackhole.securitysage.com
43rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
43rhsbl.sorbs.net (union of all results)
23rddn.dnsbl.net.au (zone not intended for this use)
15ex.dnsbl.org
13dynamic.rhs.mailpolice.com
1cart00ney.surriel.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 11 June 2006.