Blacklists Compared

3 June 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
83521(total number of IP addresses tested, including 506 at SDSC)
74301(union of most IP zones)
53782block.blars.org
43404dnsbl.sorbs.net (union of all results)
38505t1.dnsbl.net.au
34012dnsbl.sorbs.net (result 127.0.0.10 = dialup)
33871blackholes.five-ten-sg.com (union of all results)
32849blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
31647sbl-xbl.spamhaus.org (union of all results)
30441xbl.spamhaus.org (union of all results)
29093cbl.abuseat.org
29085xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
29081sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
26696dynablock.njabl.org
23502cn-kr.blackholes.us (result 127.0.0.2 = China)
23502cn-kr.blackholes.us (union of all results)
17572china.blackholes.us
17248no-more-funn.moensted.dk (union of all results)
12217sbl.csma.biz
11665unconfirmed.dsbl.org
11521list.dsbl.org
11519dsbl.dnsbl.net.au
10841bl.spamcop.net
9846blacklist.spambag.org
8848dnsbl-2.uceprotect.net
8604combined-hib.dnsiplists.completewhois.com (union of all results)
8600combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
8263dnsbl-1.uceprotect.net
7847dnsbl.sorbs.net (result 127.0.0.6 = spam source)
6874no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
6750wpbl.dnsbl.net.au
6475no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
6178bl.csma.biz
6071korea.services.net
5930korea.blackholes.us
5800psbl.surriel.com
5293dnsbl.njabl.org (union of all results)
4108l2.spews.dnsbl.sorbs.net
3990unsure.nether.net
3979dnsbl.njabl.org (result 127.0.0.9 = open proxy)
3955spamsources.fabel.dk
3437dnsbl.ahbl.org (union of all results)
3394no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
3237l1.spews.dnsbl.sorbs.net
3205rmst.dnsbl.net.au
3070dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
3047dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2785xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
2785sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
2420brazil.blackholes.us
2379ricn.dnsbl.net.au
1740dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1676sbl.spamhaus.org
1671sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1599japan.blackholes.us
1583dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1537taiwan.blackholes.us
1475tr.countries.nerd.dk
1473turkey.blackholes.us
1454mail-abuse.blacklist.jippg.org
1122bl.spamcannibal.org
1065russia.blackholes.us
1052dnsbl.njabl.org (result 127.0.0.3 = dialup)
901dnsbl-3.uceprotect.net
881probes.dnsbl.net.au
872argentina.blackholes.us
863spews.dnsbl.net.au
849mexico.blackholes.us
615blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
378malaysia.blackholes.us
378hongkong.blackholes.us
370dnsbl.ahbl.org (result 127.0.0.4 = spam source)
329thailand.blackholes.us
292dnsbl.antispam.or.id
253no-more-funn.moensted.dk (result 127.0.0.9 = misc)
253no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
246singapore.blackholes.us
183blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
162blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
157query.bondedsender.org (not a blacklist!)
150spam.wytnij.to
149work.drbl.croco.net
138dnsbl.njabl.org (result 127.0.0.4 = spam source)
137ohps.dnsbl.net.au
132dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
132dnsbl.njabl.org (result 127.0.0.2 = open relay)
113dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
105multihop.dsbl.org
95relays.ordb.org
88flowgoaway.com
64blackholes.intersil.net
51blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
28osps.dnsbl.net.au
20blackholes.uceb.org (union of all results)
19tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
19exemptions.ahbl.org (not a blacklist!)
19tor.dnsbl.sectoor.de (union of all results)
18dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
17relays.nether.net
16nigeria.blackholes.us
15rdts.dnsbl.net.au
14dnsbl.sorbs.net (result 127.0.0.5 = open relay)
13dnsbl.ahbl.org (result 127.0.0.15 = open relay)
13spamguard.leadmon.net (union of all results)
12blackholes.uceb.org (result 127.0.0.3 = spam source)
10spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
10hil.habeas.com
7owps.dnsbl.net.au
7osrs.dnsbl.net.au
6blackholes.uceb.org (result 127.0.0.2 = open relay)
6blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
5blackholes.brainerd.net
4combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
3dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
2blackholes.uceb.org (result 127.0.0.5 = dialup)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
2blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
1omrs.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)
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
83521(total number of IP addresses whose names were tested, including 506 at SDSC)
42163(union of all domain zones)
32251abuse.rfc-ignorant.org
26953rddn.dnsbl.net.au
22020dynamic.rhs.mailpolice.com
20570whois.rfc-ignorant.org (union of all results)
15717whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
4856whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3097webmail.rhs.mailpolice.com
487rhsbl.ahbl.org
461adv.rhs.mailpolice.com
273postmaster.rfc-ignorant.org
100dsn.rfc-ignorant.org (zone not intended for this use)
100bogusmx.rfc-ignorant.org
77bulk.rhs.mailpolice.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
43365(total number of domains tested, including 416 at SDSC)
8910(union of all domain zones)
3326whois.rfc-ignorant.org (union of all results)
3074abuse.rfc-ignorant.org
2751whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1477webmail.rhs.mailpolice.com
1380rhsbl.ahbl.org
1276postmaster.rfc-ignorant.org
918dsn.rfc-ignorant.org
741bogusmx.rfc-ignorant.org
575whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
271porn.rhs.mailpolice.com
194blackhole.securitysage.com
190bulk.rhs.mailpolice.com
167adv.rhs.mailpolice.com
45rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
45rhsbl.sorbs.net (union of all results)
33rddn.dnsbl.net.au (zone not intended for this use)
17dynamic.rhs.mailpolice.com
17ex.dnsbl.org
1cart00ney.surriel.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 17 June 2006.