Blacklists Compared

18 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
70462(total number of IP addresses tested, including 496 at SDSC)
63225(union of most IP zones)
43535block.blars.org
39120dnsbl.sorbs.net (union of all results)
38052t1.dnsbl.net.au
33045sbl-xbl.spamhaus.org (union of all results)
31080dnsbl.sorbs.net (result 127.0.0.10 = dialup)
30593xbl.spamhaus.org (union of all results)
28885cbl.abuseat.org
28873xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
28869sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
28429blackholes.five-ten-sg.com (union of all results)
27557blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
25407psbl.surriel.com
23003dynablock.njabl.org
15844no-more-funn.moensted.dk (union of all results)
13286cn-kr.blackholes.us (result 127.0.0.2 = China)
13286cn-kr.blackholes.us (union of all results)
13252sbl.csma.biz
11862unconfirmed.dsbl.org
11720list.dsbl.org
11717dsbl.dnsbl.net.au
9887blacklist.spambag.org
9753bl.spamcop.net
9601china.blackholes.us
8523dnsbl-1.uceprotect.net
7546no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
6558dnsbl.sorbs.net (result 127.0.0.6 = spam source)
6028bl.csma.biz
5877combined-hib.dnsiplists.completewhois.com (union of all results)
5862combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
5496unsure.nether.net
5458wpbl.dnsbl.net.au
5397l2.spews.dnsbl.sorbs.net
5185dnsbl-2.uceprotect.net
4757dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
4749spews.dnsbl.net.au
4748l1.spews.dnsbl.sorbs.net
4297dnsbl.njabl.org (union of all results)
4048no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
3728rmst.dnsbl.net.au
3721korea.services.net
3685korea.blackholes.us
3588no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
3418dnsbl.ahbl.org (union of all results)
3176sbl.spamhaus.org
3157sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
3068dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2651spamsources.fabel.dk
2632ricn.dnsbl.net.au
2402dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2148brazil.blackholes.us
2097xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
2097sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
2016opm.blitzed.org
2013xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
2013sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1796dnsbl-3.uceprotect.net
1672spam.wytnij.to
1623mail-abuse.blacklist.jippg.org
1552russia.blackholes.us
1448japan.blackholes.us
1103taiwan.blackholes.us
1085dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1051probes.dnsbl.net.au
1040bl.spamcannibal.org
994tr.countries.nerd.dk
992turkey.blackholes.us
990dnsbl.ahbl.org (result 127.0.0.4 = spam source)
982dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
932dnsbl.njabl.org (result 127.0.0.3 = dialup)
789mexico.blackholes.us
574argentina.blackholes.us
503blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
448dnsbl.antispam.or.id
422hongkong.blackholes.us
408thailand.blackholes.us
370malaysia.blackholes.us
343no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
319no-more-funn.moensted.dk (result 127.0.0.9 = misc)
252singapore.blackholes.us
192blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
179blackholes.intersil.net
179query.bondedsender.org (not a blacklist!)
163dnsbl.njabl.org (result 127.0.0.2 = open relay)
144dnsbl.njabl.org (result 127.0.0.4 = spam source)
126relays.ordb.org
122blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
119ohps.dnsbl.net.au
114multihop.dsbl.org
79flowgoaway.com
75dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
56dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
43osps.dnsbl.net.au
36blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
27rdts.dnsbl.net.au
20nigeria.blackholes.us
18dnsbl.ahbl.org (result 127.0.0.15 = open relay)
17exemptions.ahbl.org (not a blacklist!)
17blackholes.uceb.org (union of all results)
15dnsbl.sorbs.net (result 127.0.0.5 = open relay)
15combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
14tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
14blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
14tor.dnsbl.sectoor.de (union of all results)
13dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
12spamguard.leadmon.net (union of all results)
11relays.nether.net
7blackholes.uceb.org (result 127.0.0.3 = spam source)
7osrs.dnsbl.net.au
6spamguard.leadmon.net (result 127.0.0.3 = spam source)
6hil.habeas.com
5blackholes.uceb.org (result 127.0.0.2 = open relay)
5spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
4blackholes.uceb.org (result 127.0.0.6 = spam haven)
4blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
3dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
2owps.dnsbl.net.au
2blackholes.brainerd.net
1blackholes.uceb.org (result 127.0.0.5 = dialup)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1spamsites.dnsbl.net.au
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
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 127.0.0.4 = unconfirmed opt-in)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
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
70462(total number of IP addresses whose names were tested, including 496 at SDSC)
39593(union of all domain zones)
27205abuse.rfc-ignorant.org
25938rddn.dnsbl.net.au
19724dynamic.rhs.mailpolice.com
19550whois.rfc-ignorant.org (union of all results)
15737whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
3813whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2398webmail.rhs.mailpolice.com
1288rhsbl.ahbl.org
636bl.deadbeef.com
545adv.rhs.mailpolice.com
319bulk.rhs.mailpolice.com
288postmaster.rfc-ignorant.org
124dsn.rfc-ignorant.org (zone not intended for this use)
124bogusmx.rfc-ignorant.org
4porn.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
39090(total number of domains tested, including 398 at SDSC)
7465(union of all domain zones)
2749whois.rfc-ignorant.org (union of all results)
2264abuse.rfc-ignorant.org
2248whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1137postmaster.rfc-ignorant.org
1099rhsbl.ahbl.org
998bogusmx.rfc-ignorant.org
909webmail.rhs.mailpolice.com
795dsn.rfc-ignorant.org
501whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
202adv.rhs.mailpolice.com
175bulk.rhs.mailpolice.com
134bl.deadbeef.com
133porn.rhs.mailpolice.com
117blackhole.securitysage.com
30rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
30rhsbl.sorbs.net (union of all results)
25rddn.dnsbl.net.au (zone not intended for this use)
15ex.dnsbl.org
8dynamic.rhs.mailpolice.com
2fraud.rhs.mailpolice.com
2cart00ney.surriel.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 3 April 2006.