Blacklists Compared

4 February 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
71001(total number of IP addresses tested, including 487 at SDSC)
63361(union of most IP zones)
43743block.blars.org
41280t1.dnsbl.net.au
38789dnsbl.sorbs.net (union of all results)
36500sbl-xbl.spamhaus.org (union of all results)
34457xbl.spamhaus.org (union of all results)
34203blackholes.five-ten-sg.com (union of all results)
33214blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
33076xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
33076sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
33056cbl.abuseat.org
30729dnsbl.sorbs.net (result 127.0.0.10 = dialup)
25560psbl.surriel.com
22001dynablock.njabl.org
18277no-more-funn.moensted.dk (union of all results)
13488cn-kr.blackholes.us (result 127.0.0.2 = China)
13488cn-kr.blackholes.us (union of all results)
12996sbl.csma.biz
12334unconfirmed.dsbl.org
12248list.dsbl.org
12239dsbl.dnsbl.net.au
10538bl.spamcop.net
9983blacklist.spambag.org
9739no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
8924china.blackholes.us
6285bl.csma.biz
6066dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
5896combined-hib.dnsiplists.completewhois.com (union of all results)
5887combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
5658dnsbl.sorbs.net (result 127.0.0.6 = spam source)
5426l2.spews.dnsbl.sorbs.net
4899unsure.nether.net
4876l1.spews.dnsbl.sorbs.net
4873spews.dnsbl.net.au
4782wpbl.dnsbl.net.au
4564korea.blackholes.us
4557dnsbl.rangers.eu.org (union of all results)
4543korea.services.net
4254dnsbl.rangers.eu.org (result 127.0.0.2 = dialup)
4135no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
4009dnsbl.njabl.org (union of all results)
3681no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
3653rmst.dnsbl.net.au
3427dnsbl.ahbl.org (union of all results)
2867dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2541sbl.spamhaus.org
2529sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
2413ricn.dnsbl.net.au
2331dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2262xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
2262sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
2262opm.blitzed.org
2203brazil.blackholes.us
2049spamsources.fabel.dk
1858xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1858sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1638japan.blackholes.us
1571spam.wytnij.to
1545russia.blackholes.us
1440dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1318dnsbl.antispam.or.id
1287dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1174probes.dnsbl.net.au
1123turkey.blackholes.us
1090dnsbl.ahbl.org (result 127.0.0.4 = spam source)
1009bl.spamcannibal.org
1006mail-abuse.blacklist.jippg.org
937taiwan.blackholes.us
926dnsbl.njabl.org (result 127.0.0.3 = dialup)
907mexico.blackholes.us
513argentina.blackholes.us
433no-more-funn.moensted.dk (result 127.0.0.9 = misc)
403blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
375malaysia.blackholes.us
374hongkong.blackholes.us
359blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
325thailand.blackholes.us
301no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
223singapore.blackholes.us
213dnsbl.rangers.eu.org (result 127.0.0.16 = spam haven)
190query.bondedsender.org (not a blacklist!)
181blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
165blackholes.intersil.net
137ohps.dnsbl.net.au
127dnsbl.njabl.org (result 127.0.0.2 = open relay)
118dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
110dnsbl.njabl.org (result 127.0.0.4 = spam source)
97relays.ordb.org
82flowgoaway.com
75dnsbl.rangers.eu.org (result 127.0.0.8 = spam source)
57multihop.dsbl.org
55tr.countries.nerd.dk
47dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
37osps.dnsbl.net.au
35rdts.dnsbl.net.au
31blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
21blackholes.uceb.org (union of all results)
18relays.nether.net
14dnsbl.rangers.eu.org (result 127.0.0.4 = virus notices)
14exemptions.ahbl.org (not a blacklist!)
12nigeria.blackholes.us
10osrs.dnsbl.net.au
9tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
9dnsbl.regedit64.net
9combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
9dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
9tor.dnsbl.sectoor.de (union of all results)
8dnsbl.ahbl.org (result 127.0.0.15 = open relay)
6blackholes.uceb.org (result 127.0.0.3 = spam source)
6blackholes.uceb.org (result 127.0.0.2 = open relay)
6blackholes.uceb.org (result 127.0.0.6 = spam haven)
6dnsbl.sorbs.net (result 127.0.0.5 = open relay)
6blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
5hil.habeas.com
5blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
4blackholes.uceb.org (result 127.0.0.5 = dialup)
4blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
4blackholes.brainerd.net
4spamguard.leadmon.net (union of all results)
3spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2owps.dnsbl.net.au
2dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1dnsbl.rangers.eu.org (result 127.0.0.32 = worm source)
1spamsites.dnsbl.net.au
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
1bl.deadbeef.com

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
71001(total number of IP addresses whose names were tested, including 487 at SDSC)
39969(union of all domain zones)
26644abuse.rfc-ignorant.org
26334rddn.dnsbl.net.au
19132whois.rfc-ignorant.org (union of all results)
15272whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
10915dynamic.rhs.mailpolice.com
3860whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2502webmail.rhs.mailpolice.com
1312rhsbl.ahbl.org
649bl.deadbeef.com
491adv.rhs.mailpolice.com
339bulk.rhs.mailpolice.com
289postmaster.rfc-ignorant.org
127bogusmx.rfc-ignorant.org
120dsn.rfc-ignorant.org (zone not intended for this use)
4blackhole.securitysage.com

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

HitsDNS Zone
34241(total number of domains tested, including 417 at SDSC)
7491(union of all domain zones)
2576whois.rfc-ignorant.org (union of all results)
2414abuse.rfc-ignorant.org
2042whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1212postmaster.rfc-ignorant.org
1144rhsbl.ahbl.org
998webmail.rhs.mailpolice.com
851bogusmx.rfc-ignorant.org
781dsn.rfc-ignorant.org
534whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
243bulk.rhs.mailpolice.com
217adv.rhs.mailpolice.com
165bl.deadbeef.com
129porn.rhs.mailpolice.com
104blackhole.securitysage.com
38rddn.dnsbl.net.au (zone not intended for this use)
24rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
24rhsbl.sorbs.net (union of all results)
17dynamic.rhs.mailpolice.com
13ex.dnsbl.org
3cart00ney.surriel.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 16 February 2006.