Blacklists Compared

29 July 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
88645(total number of IP addresses tested, including 643 at SDSC)
80258(union of most IP zones)
57874block.blars.org
54470dnsbl.sorbs.net (union of all results)
48794t1.dnsbl.net.au
44078blackholes.five-ten-sg.com (union of all results)
42688blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
40259dnsbl.sorbs.net (result 127.0.0.10 = dialup)
40033dnsbl.tqmcube.com (union of all results)
28985dynablock.njabl.org
27787sbl-xbl.spamhaus.org (union of all results)
26840xbl.spamhaus.org (union of all results)
24064cbl.abuseat.org
24026xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
24020sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
22678psbl.surriel.com
19731cn-kr.blackholes.us (result 127.0.0.2 = China)
19731cn-kr.blackholes.us (union of all results)
15673no-more-funn.moensted.dk (union of all results)
14240dnsbl.tqmcube.com (result 127.0.0.2 = dialup)
13885china.blackholes.us
13104dnsbl.tqmcube.com (result 127.0.0.5 = China)
13087dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
12424unconfirmed.dsbl.org
12333list.dsbl.org
12326dsbl.dnsbl.net.au
11352bl.csma.biz
10705blacklist.spambag.org
8560wpbl.dnsbl.net.au
8493bl.spamcop.net
7949dnsbl.tqmcube.com (result 127.0.0.3 = spam source)
7904dnsbl-2.uceprotect.net
7661dnsbl-1.uceprotect.net
7635dnsbl.sorbs.net (result 127.0.0.6 = spam source)
7571combined-hib.dnsiplists.completewhois.com (union of all results)
7570combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
7192dnsbl.njabl.org (union of all results)
7096no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
6082korea.services.net
5850korea.blackholes.us
5825dnsbl.njabl.org (result 127.0.0.9 = open proxy)
5012dnsbl.tqmcube.com (result 127.0.0.4 = South Korea)
4659no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
4634l2.spews.dnsbl.sorbs.net
4572sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
4571xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
4145dnsbl.ahbl.org (union of all results)
4062unsure.nether.net
3848dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
3675no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
3639l1.spews.dnsbl.sorbs.net
3568brazil.blackholes.us
3500rmst.dnsbl.net.au
3187spamsources.fabel.dk
2861spam.wytnij.to
2805dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1914taiwan.blackholes.us
1801ricn.dnsbl.net.au
1719dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1716mail-abuse.blacklist.jippg.org
1589tr.countries.nerd.dk
1584turkey.blackholes.us
1525japan.blackholes.us
1203bl.spamcannibal.org
1097sbl.spamhaus.org
1096sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
979dnsbl.njabl.org (result 127.0.0.3 = dialup)
960dnsbl-3.uceprotect.net
844sbl.csma.biz
817blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
777argentina.blackholes.us
746russia.blackholes.us
708mexico.blackholes.us
623probes.dnsbl.net.au
450malaysia.blackholes.us
443spews.dnsbl.net.au
429hongkong.blackholes.us
407thailand.blackholes.us
329blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
307dnsbl.njabl.org (result 127.0.0.4 = spam source)
275blackholes.uceb.org (union of all results)
271dnsbl.ahbl.org (result 127.0.0.4 = spam source)
269blackholes.uceb.org (result 127.0.0.3 = spam source)
266no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
232no-more-funn.moensted.dk (result 127.0.0.9 = misc)
229singapore.blackholes.us
187blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
172blackholes.intersil.net
161ohps.dnsbl.net.au
147query.bondedsender.org (not a blacklist!)
139work.drbl.croco.net
113dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
106dnsbl.antispam.or.id
91dnsbl.njabl.org (result 127.0.0.2 = open relay)
84flowgoaway.com
79multihop.dsbl.org
75dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
52blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
43relays.ordb.org
31osps.dnsbl.net.au
27relays.nether.net
26spamguard.leadmon.net (union of all results)
25blackholes.brainerd.net
22rdts.dnsbl.net.au
20spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
19exemptions.ahbl.org (not a blacklist!)
18tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
18tor.dnsbl.sectoor.de (union of all results)
14dnsbl.sorbs.net (result 127.0.0.5 = open relay)
14dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
12nigeria.blackholes.us
10osrs.dnsbl.net.au
10dnsbl.ahbl.org (result 127.0.0.15 = open relay)
10dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
9hil.habeas.com
6no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
5blackholes.uceb.org (result 127.0.0.2 = open relay)
4owps.dnsbl.net.au
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3spamguard.leadmon.net (result 127.0.0.3 = spam source)
3spamguard.leadmon.net (result 127.0.0.8 = open proxy)
3blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
2blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
2bl.deadbeef.com
1blackholes.uceb.org (result 127.0.0.5 = dialup)
1spamsites.dnsbl.net.au
1combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
1dnsbl.ahbl.org (result 127.0.0.18 = virus source)

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
88645(total number of IP addresses whose names were tested, including 643 at SDSC)
48234(union of all domain zones)
36235rddn.dnsbl.net.au
35168abuse.rfc-ignorant.org
24906dynamic.rhs.mailpolice.com
23886whois.rfc-ignorant.org (union of all results)
18739whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
5150whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3147webmail.rhs.mailpolice.com
683rhsbl.ahbl.org
519adv.rhs.mailpolice.com
321postmaster.rfc-ignorant.org
90bogusmx.rfc-ignorant.org
89dsn.rfc-ignorant.org (zone not intended for this use)
77bulk.rhs.mailpolice.com
4porn.rhs.mailpolice.com
1ex.dnsbl.org

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

HitsDNS Zone
56042(total number of domains tested, including 610 at SDSC)
8992(union of all domain zones)
3360whois.rfc-ignorant.org (union of all results)
3159abuse.rfc-ignorant.org
2728whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1493webmail.rhs.mailpolice.com
1199postmaster.rfc-ignorant.org
1143rhsbl.ahbl.org
936dsn.rfc-ignorant.org
763bogusmx.rfc-ignorant.org
632whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
284porn.rhs.mailpolice.com
262bulk.rhs.mailpolice.com
191adv.rhs.mailpolice.com
156blackhole.securitysage.com
57rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
57rhsbl.sorbs.net (union of all results)
21rddn.dnsbl.net.au (zone not intended for this use)
15ex.dnsbl.org
11dynamic.rhs.mailpolice.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 20 August 2006.