Blacklists Compared

17 September 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
39433(total number of IP addresses tested, including 521 at SDSC)
32424(union of most IP zones)
26797block.blars.org
23075t1.dnsbl.net.au
17948dnsbl.sorbs.net (union of all results)
17939sbl-xbl.spamhaus.org (union of all results)
16553xbl.spamhaus.org (union of all results)
15832sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
15824xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
15786cbl.abuseat.org
13322dnsbl.sorbs.net (result 127.0.0.10 = dialup)
10566psbl.surriel.com
9234dynablock.njabl.org
7977no-more-funn.moensted.dk (union of all results)
7572unconfirmed.dsbl.org
7522blackholes.five-ten-sg.com (union of all results)
7513list.dsbl.org
7510dsbl.dnsbl.net.au
7072blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
7009sbl.csma.biz
6752rmst.dnsbl.net.au
4403bl.spamcop.net
4136combined-hib.dnsiplists.completewhois.com (union of all results)
4131combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
4105blacklist.spambag.org
3695no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
3376bl.csma.biz
3356korea.services.net
3197l2.spews.dnsbl.sorbs.net
3067dnsbl.njabl.org (union of all results)
2771dnsbl.ahbl.org (union of all results)
2738dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2632l1.spews.dnsbl.sorbs.net
2627spews.dnsbl.net.au
2348spamsources.fabel.dk
2338dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2305ricn.dnsbl.net.au
2192dnsbl.rangers.eu.org (union of all results)
2092dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2055wpbl.dnsbl.net.au
1962dnsbl.rangers.eu.org (result 127.0.0.2 = dialup)
1929dnsbl.regedit64.net
1713no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1646no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
1566unsure.nether.net
1563xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1563opm.blitzed.org
1562sbl.spamhaus.org
1561sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1561sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1430xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1429sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1376dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1073bl.spamcannibal.org
1058dnsbl.antispam.or.id
857dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
839dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
697no-more-funn.moensted.dk (result 127.0.0.9 = misc)
693spam.wytnij.to
655dnsbl.ahbl.org (result 127.0.0.4 = spam source)
538probes.dnsbl.net.au
430dnsbl.njabl.org (result 127.0.0.3 = dialup)
310tr.countries.nerd.dk
235no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
231blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
204query.bondedsender.org (not a blacklist!)
200dnsbl.njabl.org (result 127.0.0.2 = open relay)
166blackholes.intersil.net
148dnsbl.rangers.eu.org (result 127.0.0.16 = spam haven)
145blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
111relays.ordb.org
111mail-abuse.blacklist.jippg.org
110ohps.dnsbl.net.au
102dnsbl.njabl.org (result 127.0.0.4 = spam source)
97dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
91dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
85flowgoaway.com
68dnsbl.rangers.eu.org (result 127.0.0.8 = spam source)
64multihop.dsbl.org
34osps.dnsbl.net.au
33blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
32exemptions.ahbl.org (not a blacklist!)
29blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
23osrs.dnsbl.net.au
22rdts.dnsbl.net.au
19blackholes.uceb.org (union of all results)
15relays.nether.net
13dnsbl.rangers.eu.org (result 127.0.0.4 = virus notices)
13dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
10blackholes.brainerd.net
9dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
9dialup.blacklist.jippg.org (union of all results)
8dnsbl.sorbs.net (result 127.0.0.5 = open relay)
7blackholes.uceb.org (result 127.0.0.2 = open relay)
7tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
7hil.habeas.com
7blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
6blackholes.uceb.org (result 127.0.0.3 = spam source)
6blackholes.uceb.org (result 127.0.0.6 = spam haven)
6dialup.blacklist.jippg.org (result 127.0.0.4 = dialup in Japan)
5combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
4owps.dnsbl.net.au
4spamguard.leadmon.net (union of all results)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3omrs.dnsbl.net.au
3spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
3bl.deadbeef.com
2no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
2blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
2blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
2dnsbl.ahbl.org (result 127.0.0.15 = open relay)
1dnsbl.rangers.eu.org (result 127.0.0.32 = worm source)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
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)
1blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
1dnsbl.ahbl.org (result 127.0.0.18 = virus source)

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
39433(total number of IP addresses whose names were tested, including 521 at SDSC)
19126(union of all domain zones)
13524abuse.rfc-ignorant.org
9793rddn.dnsbl.net.au
8504whois.rfc-ignorant.org (union of all results)
6521whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
4402dynamic.rhs.mailpolice.com
2025webmail.rhs.mailpolice.com
1987whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1136rhsbl.ahbl.org
448bl.deadbeef.com
417adv.rhs.mailpolice.com
257bulk.rhs.mailpolice.com
174postmaster.rfc-ignorant.org
92bogusmx.rfc-ignorant.org
84dsn.rfc-ignorant.org (zone not intended for this use)
1porn.rhs.mailpolice.com

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

HitsDNS Zone
24071(total number of domains tested, including 465 at SDSC)
6726(union of all domain zones)
2597whois.rfc-ignorant.org (union of all results)
2363abuse.rfc-ignorant.org
2114whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1192postmaster.rfc-ignorant.org
1123rhsbl.ahbl.org
1074webmail.rhs.mailpolice.com
839dsn.rfc-ignorant.org
483whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
473bogusmx.rfc-ignorant.org
366bulk.rhs.mailpolice.com
204adv.rhs.mailpolice.com
173bl.deadbeef.com
165blackhole.securitysage.com
84porn.rhs.mailpolice.com
49rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
49rhsbl.sorbs.net (union of all results)
22rddn.dnsbl.net.au (zone not intended for this use)
12ex.dnsbl.org
6dynamic.rhs.mailpolice.com
3cart00ney.surriel.com
1fraud.rhs.mailpolice.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 26 September 2005.