Blacklists Compared

9 September 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
101185(total number of IP addresses tested, including 564 at SDSC)
89956(union of most IP zones)
72624t1.dnsbl.net.au
61510block.blars.org
56387zen.spamhaus.org (union of all results)
56386sbl-xbl.spamhaus.org (union of all results)
55909xbl.spamhaus.org (union of all results)
55077cbl.abuseat.org
55040xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
55039zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
55038sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
52829dnsbl.sorbs.net (union of all results)
46752blackholes.five-ten-sg.com (union of all results)
45141blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
44280psbl.surriel.com
42696dnsbl.sorbs.net (result 127.0.0.10 = dialup)
41417dnsbl.tqmcube.com (union of all results)
29761dynablock.njabl.org
25573no-more-funn.moensted.dk (union of all results)
21007dnsbl-1.uceprotect.net
19118dnsbl-2.uceprotect.net
18719dnsbl.tqmcube.com (result 127.0.0.2 = dialup)
16194cn-kr.blackholes.us (result 127.0.0.2 = China)
16194cn-kr.blackholes.us (union of all results)
15762bl.spamcop.net
14618no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
10402china.blackholes.us
10295unconfirmed.dsbl.org
10279dnsbl.tqmcube.com (result 127.0.0.5 = China)
10163list.dsbl.org
10152dsbl.dnsbl.net.au
9994dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
9603blacklist.spambag.org
8046bl.csma.biz
7448no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
6922dnsbl.tqmcube.com (result 127.0.0.3 = spam source)
6500ubl.unsubscore.com
6328combined-hib.dnsiplists.completewhois.com (union of all results)
6276combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
6230korea.services.net
5832dnsbl.njabl.org (union of all results)
5793korea.blackholes.us
5666wpbl.dnsbl.net.au
5502dnsbl.tqmcube.com (result 127.0.0.4 = South Korea)
4354dnsbl.njabl.org (result 127.0.0.9 = open proxy)
4060dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3503unsure.nether.net
3448brazil.blackholes.us
3266dnsbl.ahbl.org (union of all results)
3182rmst.dnsbl.net.au
3075spamsources.fabel.dk
3042no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
3033dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2981zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
2981xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
2981sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
2725spam.wytnij.to
2215tr.countries.nerd.dk
2211turkey.blackholes.us
2122mail-abuse.blacklist.jippg.org
1978dnsbl-3.uceprotect.net
1907dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1758japan.blackholes.us
1649dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1593argentina.blackholes.us
1351taiwan.blackholes.us
1293probes.dnsbl.net.au
1193dnsbl.njabl.org (result 127.0.0.3 = dialup)
1140mexico.blackholes.us
1028l2.spews.dnsbl.sorbs.net
969l1.spews.dnsbl.sorbs.net
882bl.spamcannibal.org
878russia.blackholes.us
821blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
571sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
571sbl.spamhaus.org
568zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
552thailand.blackholes.us
410malaysia.blackholes.us
360blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
339no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
338hongkong.blackholes.us
326blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
300no-more-funn.moensted.dk (result 127.0.0.9 = misc)
276ricn.dnsbl.net.au
268singapore.blackholes.us
248sbl.csma.biz
226blackholes.uceb.org (union of all results)
217dnsbl.ahbl.org (result 127.0.0.4 = spam source)
176blackholes.uceb.org (result 127.0.0.3 = spam source)
160blackholes.intersil.net
160work.drbl.croco.net
148dnsbl.njabl.org (result 127.0.0.4 = spam source)
144dnsbl.njabl.org (result 127.0.0.2 = open relay)
137query.bondedsender.org (not a blacklist!)
136dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
110dnsbl.antispam.or.id
100multihop.dsbl.org
90flowgoaway.com
88blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
73relays.ordb.org
67ohps.dnsbl.net.au
62relays.nether.net
52combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
32dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
30blackholes.uceb.org (result 127.0.0.5 = dialup)
30no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
29osps.dnsbl.net.au
26spamguard.leadmon.net (union of all results)
24exemptions.ahbl.org (not a blacklist!)
22rdts.dnsbl.net.au
22tor.dnsbl.sectoor.de (union of all results)
21tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
21spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
20blackholes.uceb.org (result 127.0.0.2 = open relay)
15dnsbl.sorbs.net (result 127.0.0.5 = open relay)
15dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
10hil.habeas.com
9nigeria.blackholes.us
9multi.surbl.org
9osrs.dnsbl.net.au
7blackholes.brainerd.net
6blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
5dnsbl.ahbl.org (result 127.0.0.15 = open relay)
4bl.deadbeef.com
3owps.dnsbl.net.au
3spamguard.leadmon.net (result 127.0.0.3 = spam source)
3blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
2spamguard.leadmon.net (result 127.0.0.8 = open proxy)
2blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
2blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
2blackholes.five-ten-sg.com (result 127.0.0.13 = challenge-response source)
2dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
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)
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
1blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)

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
101185(total number of IP addresses whose names were tested, including 564 at SDSC)
56081(union of all domain zones)
40336abuse.rfc-ignorant.org
38646rddn.dnsbl.net.au
28827whois.rfc-ignorant.org (union of all results)
27318dynamic.rhs.mailpolice.com
20257whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
8575whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3175webmail.rhs.mailpolice.com
682rhsbl.ahbl.org
522adv.rhs.mailpolice.com
314postmaster.rfc-ignorant.org
226multi.surbl.org
132bulk.rhs.mailpolice.com
94dsn.rfc-ignorant.org (zone not intended for this use)
91bogusmx.rfc-ignorant.org
14porn.rhs.mailpolice.com
2bl.deadbeef.com
1ex.dnsbl.org


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

HitsDNS Zone
60946(total number of domains tested, including 500 at SDSC)
12649(union of all domain zones)
4784whois.rfc-ignorant.org (union of all results)
4106whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3654abuse.rfc-ignorant.org
2007multi.surbl.org
1634webmail.rhs.mailpolice.com
1436postmaster.rfc-ignorant.org
1106rhsbl.ahbl.org
1017dsn.rfc-ignorant.org
911bogusmx.rfc-ignorant.org
678whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
317porn.rhs.mailpolice.com
251bulk.rhs.mailpolice.com
173adv.rhs.mailpolice.com
164blackhole.securitysage.com
54rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
54rhsbl.sorbs.net (union of all results)
17rddn.dnsbl.net.au (zone not intended for this use)
17ex.dnsbl.org
7dynamic.rhs.mailpolice.com
1cart00ney.surriel.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 15 September 2006.