Blacklists Compared

29 October 2005

[ 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
47772(total number of IP addresses tested, including 487 at SDSC)
41196(union of most IP zones)
32667block.blars.org
25263blackholes.five-ten-sg.com (union of all results)
24584dnsbl.sorbs.net (union of all results)
24025blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
23567t1.dnsbl.net.au
19144sbl-xbl.spamhaus.org (union of all results)
18010xbl.spamhaus.org (union of all results)
16815dnsbl.sorbs.net (result 127.0.0.10 = dialup)
16753xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
16753sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
16720cbl.abuseat.org
12512cn-kr.blackholes.us (result 127.0.0.2 = China)
12512cn-kr.blackholes.us (union of all results)
11660dynablock.njabl.org
10820no-more-funn.moensted.dk (union of all results)
9631psbl.surriel.com
9332unconfirmed.dsbl.org
9237list.dsbl.org
9234dsbl.dnsbl.net.au
8933china.blackholes.us
8446sbl.csma.biz
6087combined-hib.dnsiplists.completewhois.com (union of all results)
6072combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
5882bl.spamcop.net
5364blacklist.spambag.org
4586no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
4523bl.csma.biz
3967dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
3763dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3721no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
3692dnsbl.njabl.org (union of all results)
3600l2.spews.dnsbl.sorbs.net
3578korea.blackholes.us
3566korea.services.net
3426spamsources.fabel.dk
3182dnsbl.ahbl.org (union of all results)
3009l1.spews.dnsbl.sorbs.net
3004spews.dnsbl.net.au
2885dnsbl.rangers.eu.org (union of all results)
2868dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2831wpbl.dnsbl.net.au
2685dnsbl.rangers.eu.org (result 127.0.0.2 = dialup)
2646dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2555ricn.dnsbl.net.au
2470unsure.nether.net
2341dnsbl.regedit64.net
2162brazil.blackholes.us
1918dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1896rmst.dnsbl.net.au
1825sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1824xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1824opm.blitzed.org
1813no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1727sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1725xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1373sbl.spamhaus.org
1372sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1228dnsbl.antispam.or.id
1014dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1007spam.wytnij.to
984japan.blackholes.us
832bl.spamcannibal.org
814russia.blackholes.us
758blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
716mexico.blackholes.us
707taiwan.blackholes.us
624probes.dnsbl.net.au
577tr.countries.nerd.dk
573turkey.blackholes.us
524dnsbl.ahbl.org (result 127.0.0.4 = spam source)
520dnsbl.njabl.org (result 127.0.0.3 = dialup)
511no-more-funn.moensted.dk (result 127.0.0.9 = misc)
449hongkong.blackholes.us
441argentina.blackholes.us
345blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
268malaysia.blackholes.us
202mail-abuse.blacklist.jippg.org
201no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
198query.bondedsender.org (not a blacklist!)
180thailand.blackholes.us
173dnsbl.njabl.org (result 127.0.0.2 = open relay)
167relays.ordb.org
155singapore.blackholes.us
151blackholes.intersil.net
144dnsbl.njabl.org (result 127.0.0.4 = spam source)
123dnsbl.rangers.eu.org (result 127.0.0.16 = spam haven)
114dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
102dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
95blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
78multihop.dsbl.org
75flowgoaway.com
73ohps.dnsbl.net.au
64dnsbl.rangers.eu.org (result 127.0.0.8 = spam source)
31exemptions.ahbl.org (not a blacklist!)
28rdts.dnsbl.net.au
28relays.nether.net
26osps.dnsbl.net.au
26blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
21blackholes.uceb.org (union of all results)
17nigeria.blackholes.us
15combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
13spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
13spamguard.leadmon.net (union of all results)
12dnsbl.sorbs.net (result 127.0.0.5 = open relay)
12dnsbl.rangers.eu.org (result 127.0.0.4 = virus notices)
11blackholes.uceb.org (result 127.0.0.2 = open relay)
11osrs.dnsbl.net.au
10blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
9blackholes.brainerd.net
9dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
7blackholes.uceb.org (result 127.0.0.3 = spam source)
5owps.dnsbl.net.au
5dnsbl.ahbl.org (result 127.0.0.15 = open relay)
4hil.habeas.com
3blackholes.uceb.org (result 127.0.0.6 = spam haven)
2tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
2no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
2blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
2blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
2tor.dnsbl.sectoor.de (union of all results)
1dnsbl.rangers.eu.org (result 127.0.0.32 = worm source)
1omrs.dnsbl.net.au

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
47772(total number of IP addresses whose names were tested, including 487 at SDSC)
22502(union of all domain zones)
16696abuse.rfc-ignorant.org
13282rddn.dnsbl.net.au
9922whois.rfc-ignorant.org (union of all results)
7551whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
6525dynamic.rhs.mailpolice.com
2375whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2215webmail.rhs.mailpolice.com
982rhsbl.ahbl.org
462adv.rhs.mailpolice.com
384bl.deadbeef.com
322bulk.rhs.mailpolice.com
304postmaster.rfc-ignorant.org
193dsn.rfc-ignorant.org (zone not intended for this use)
192bogusmx.rfc-ignorant.org
1blackhole.securitysage.com
1porn.rhs.mailpolice.com


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

HitsDNS Zone
27107(total number of domains tested, including 420 at SDSC)
7070(union of all domain zones)
2821whois.rfc-ignorant.org (union of all results)
2434abuse.rfc-ignorant.org
2322whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1266postmaster.rfc-ignorant.org
1112webmail.rhs.mailpolice.com
995rhsbl.ahbl.org
902dsn.rfc-ignorant.org
543bogusmx.rfc-ignorant.org
499whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
300bulk.rhs.mailpolice.com
206adv.rhs.mailpolice.com
184bl.deadbeef.com
147blackhole.securitysage.com
96porn.rhs.mailpolice.com
32rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
32rhsbl.sorbs.net (union of all results)
24rddn.dnsbl.net.au (zone not intended for this use)
15ex.dnsbl.org
6dynamic.rhs.mailpolice.com
2fraud.rhs.mailpolice.com
2cart00ney.surriel.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 12 November 2005.