Blacklists Compared

15 April 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
72706(total number of IP addresses tested, including 490 at SDSC)
65478(union of most IP zones)
46292block.blars.org
41101t1.dnsbl.net.au
37167dnsbl.sorbs.net (union of all results)
36554sbl-xbl.spamhaus.org (union of all results)
34553xbl.spamhaus.org (union of all results)
33574cbl.abuseat.org
33566xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
33559sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
28541dnsbl.sorbs.net (result 127.0.0.10 = dialup)
23438psbl.surriel.com
22432dynablock.njabl.org
19900blackholes.five-ten-sg.com (union of all results)
19310cn-kr.blackholes.us (result 127.0.0.2 = China)
19310cn-kr.blackholes.us (union of all results)
19293blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
17398no-more-funn.moensted.dk (union of all results)
15830china.blackholes.us
13185sbl.csma.biz
11720dnsbl-1.uceprotect.net
11321unconfirmed.dsbl.org
11225list.dsbl.org
11224dsbl.dnsbl.net.au
9802blacklist.spambag.org
9178bl.spamcop.net
8947dnsbl-2.uceprotect.net
8319no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
7585dnsbl.sorbs.net (result 127.0.0.6 = spam source)
7264combined-hib.dnsiplists.completewhois.com (union of all results)
7259combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
6147bl.csma.biz
5793wpbl.dnsbl.net.au
5250no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
5044unsure.nether.net
4632l2.spews.dnsbl.sorbs.net
4020dnsbl.njabl.org (union of all results)
3873l1.spews.dnsbl.sorbs.net
3565rmst.dnsbl.net.au
3541korea.services.net
3479korea.blackholes.us
3341spews.dnsbl.net.au
3332spamsources.fabel.dk
3191no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
3023dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
2919dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2812sbl.spamhaus.org
2794ricn.dnsbl.net.au
2792sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
2732dnsbl.ahbl.org (union of all results)
2254dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1906opm.blitzed.org
1882brazil.blackholes.us
1829xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1829sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1561spam.wytnij.to
1466mail-abuse.blacklist.jippg.org
1432russia.blackholes.us
1317japan.blackholes.us
1206sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1203xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1198dnsbl-3.uceprotect.net
1133probes.dnsbl.net.au
1001taiwan.blackholes.us
975bl.spamcannibal.org
950dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
908dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
881tr.countries.nerd.dk
879turkey.blackholes.us
846dnsbl.njabl.org (result 127.0.0.3 = dialup)
759dnsbl.antispam.or.id
662argentina.blackholes.us
608mexico.blackholes.us
462dnsbl.ahbl.org (result 127.0.0.4 = spam source)
382hongkong.blackholes.us
341no-more-funn.moensted.dk (result 127.0.0.9 = misc)
307blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
298no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
270malaysia.blackholes.us
217thailand.blackholes.us
189blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
187singapore.blackholes.us
156dnsbl.njabl.org (result 127.0.0.2 = open relay)
150query.bondedsender.org (not a blacklist!)
145blackholes.intersil.net
138relays.ordb.org
108dnsbl.njabl.org (result 127.0.0.4 = spam source)
106ohps.dnsbl.net.au
89blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
84flowgoaway.com
79multihop.dsbl.org
75dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
53dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
31osps.dnsbl.net.au
18relays.nether.net
15tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
15blackholes.uceb.org (union of all results)
15tor.dnsbl.sectoor.de (union of all results)
14exemptions.ahbl.org (not a blacklist!)
12blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
12dnsbl.ahbl.org (result 127.0.0.15 = open relay)
11nigeria.blackholes.us
11dnsbl.sorbs.net (result 127.0.0.5 = open relay)
9osrs.dnsbl.net.au
8hil.habeas.com
8blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
8dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
7blackholes.uceb.org (result 127.0.0.3 = spam source)
7rdts.dnsbl.net.au
6spamguard.leadmon.net (union of all results)
5blackholes.uceb.org (result 127.0.0.2 = open relay)
5combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
4owps.dnsbl.net.au
4spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3blackholes.uceb.org (result 127.0.0.5 = dialup)
3bl.deadbeef.com
3dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2blackholes.brainerd.net
1omrs.dnsbl.net.au
1no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1blackholes.five-ten-sg.com (result 127.0.0.6 = 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
72706(total number of IP addresses whose names were tested, including 490 at SDSC)
36540(union of all domain zones)
26423abuse.rfc-ignorant.org
23769rddn.dnsbl.net.au
18070dynamic.rhs.mailpolice.com
17046whois.rfc-ignorant.org (union of all results)
13520whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
3529whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2406webmail.rhs.mailpolice.com
687rhsbl.ahbl.org
581bl.deadbeef.com
540adv.rhs.mailpolice.com
228postmaster.rfc-ignorant.org
124bulk.rhs.mailpolice.com
122bogusmx.rfc-ignorant.org
114dsn.rfc-ignorant.org (zone not intended for this use)
2blackhole.securitysage.com
2porn.rhs.mailpolice.com


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

HitsDNS Zone
33387(total number of domains tested, including 412 at SDSC)
6913(union of all domain zones)
2755whois.rfc-ignorant.org (union of all results)
2272whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2196abuse.rfc-ignorant.org
1046postmaster.rfc-ignorant.org
894bogusmx.rfc-ignorant.org
825webmail.rhs.mailpolice.com
787rhsbl.ahbl.org
750dsn.rfc-ignorant.org
483whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
180adv.rhs.mailpolice.com
164bulk.rhs.mailpolice.com
142bl.deadbeef.com
120blackhole.securitysage.com
112porn.rhs.mailpolice.com
31rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
31rhsbl.sorbs.net (union of all results)
20rddn.dnsbl.net.au (zone not intended for this use)
12ex.dnsbl.org
10dynamic.rhs.mailpolice.com
2fraud.rhs.mailpolice.com
2cart00ney.surriel.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 30 April 2006.