Blacklists Compared

11 March 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
70135(total number of IP addresses tested, including 500 at SDSC)
62746(union of most IP zones)
43101block.blars.org
37065dnsbl.sorbs.net (union of all results)
36670t1.dnsbl.net.au
33825blackholes.five-ten-sg.com (union of all results)
32748blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
31642sbl-xbl.spamhaus.org (union of all results)
29293xbl.spamhaus.org (union of all results)
29212dnsbl.sorbs.net (result 127.0.0.10 = dialup)
27728sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
27722xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
27713cbl.abuseat.org
23424psbl.surriel.com
21942dynablock.njabl.org
15879no-more-funn.moensted.dk (union of all results)
14542cn-kr.blackholes.us (result 127.0.0.2 = China)
14542cn-kr.blackholes.us (union of all results)
12614sbl.csma.biz
11655unconfirmed.dsbl.org
11540list.dsbl.org
11535dsbl.dnsbl.net.au
10562china.blackholes.us
9276blacklist.spambag.org
8806bl.spamcop.net
7577no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
6351combined-hib.dnsiplists.completewhois.com (union of all results)
6337dnsbl-1.uceprotect.net
6322combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
6230dnsbl.sorbs.net (result 127.0.0.6 = spam source)
5735bl.csma.biz
5560dnsbl-2.uceprotect.net
4846wpbl.dnsbl.net.au
4820unsure.nether.net
4652l2.spews.dnsbl.sorbs.net
4560no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
4371dnsbl.njabl.org (union of all results)
4019spews.dnsbl.net.au
4016l1.spews.dnsbl.sorbs.net
3995korea.services.net
3980korea.blackholes.us
3853dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
3698rmst.dnsbl.net.au
3532dnsbl.ahbl.org (union of all results)
3194dnsbl.njabl.org (result 127.0.0.9 = open proxy)
3130no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
3034sbl.spamhaus.org
3024sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
2866spamsources.fabel.dk
2669ricn.dnsbl.net.au
2524dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2291brazil.blackholes.us
2195xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
2195sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1915opm.blitzed.org
1913sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1911xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1608russia.blackholes.us
1579spam.wytnij.to
1557japan.blackholes.us
1486dnsbl-3.uceprotect.net
1173dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1121bl.spamcannibal.org
1043dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1038taiwan.blackholes.us
1037tr.countries.nerd.dk
1032turkey.blackholes.us
1008mail-abuse.blacklist.jippg.org
992dnsbl.ahbl.org (result 127.0.0.4 = spam source)
922probes.dnsbl.net.au
833mexico.blackholes.us
815dnsbl.njabl.org (result 127.0.0.3 = dialup)
642argentina.blackholes.us
566blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
513dnsbl.antispam.or.id
474thailand.blackholes.us
473hongkong.blackholes.us
408malaysia.blackholes.us
368no-more-funn.moensted.dk (result 127.0.0.9 = misc)
296blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
246no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
242dnsbl.njabl.org (result 127.0.0.2 = open relay)
224singapore.blackholes.us
191query.bondedsender.org (not a blacklist!)
188blackholes.intersil.net
165relays.ordb.org
163blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
130dnsbl.njabl.org (result 127.0.0.4 = spam source)
129ohps.dnsbl.net.au
87multihop.dsbl.org
77flowgoaway.com
55dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
52dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
36blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
29osps.dnsbl.net.au
29combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
24nigeria.blackholes.us
24rdts.dnsbl.net.au
24blackholes.uceb.org (union of all results)
19relays.nether.net
17osrs.dnsbl.net.au
16dnsbl.ahbl.org (result 127.0.0.15 = open relay)
15spamguard.leadmon.net (union of all results)
14exemptions.ahbl.org (not a blacklist!)
13tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
13dnsbl.sorbs.net (result 127.0.0.5 = open relay)
13tor.dnsbl.sectoor.de (union of all results)
11spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
10blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
9blackholes.uceb.org (result 127.0.0.6 = spam haven)
9dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
8owps.dnsbl.net.au
7hil.habeas.com
6blackholes.uceb.org (result 127.0.0.3 = spam source)
6blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
5blackholes.uceb.org (result 127.0.0.2 = open relay)
4blackholes.brainerd.net
3blackholes.uceb.org (result 127.0.0.5 = dialup)
3spamguard.leadmon.net (result 127.0.0.3 = spam source)
2bl.deadbeef.com
1blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1spamsites.dnsbl.net.au
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
1no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
1dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)

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
70135(total number of IP addresses whose names were tested, including 500 at SDSC)
37457(union of all domain zones)
26724abuse.rfc-ignorant.org
24284rddn.dnsbl.net.au
18407whois.rfc-ignorant.org (union of all results)
17206dynamic.rhs.mailpolice.com
14294whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
4114whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2408webmail.rhs.mailpolice.com
1227rhsbl.ahbl.org
670bl.deadbeef.com
497adv.rhs.mailpolice.com
323bulk.rhs.mailpolice.com
295postmaster.rfc-ignorant.org
127bogusmx.rfc-ignorant.org
123dsn.rfc-ignorant.org (zone not intended for this use)
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
46043(total number of domains tested, including 390 at SDSC)
7868(union of all domain zones)
2606whois.rfc-ignorant.org (union of all results)
2249abuse.rfc-ignorant.org
2086whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1272bogusmx.rfc-ignorant.org
1187rhsbl.ahbl.org
1154postmaster.rfc-ignorant.org
964webmail.rhs.mailpolice.com
767dsn.rfc-ignorant.org
520whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
215bulk.rhs.mailpolice.com
203adv.rhs.mailpolice.com
188porn.rhs.mailpolice.com
125bl.deadbeef.com
118blackhole.securitysage.com
27rddn.dnsbl.net.au (zone not intended for this use)
25rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
25rhsbl.sorbs.net (union of all results)
11ex.dnsbl.org
7dynamic.rhs.mailpolice.com
2cart00ney.surriel.com
1fraud.rhs.mailpolice.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 28 March 2006.