Blacklists Compared

12 November 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
43279(total number of IP addresses tested, including 485 at SDSC)
36909(union of most IP zones)
28993block.blars.org
22254blackholes.five-ten-sg.com (union of all results)
21657t1.dnsbl.net.au
21416dnsbl.sorbs.net (union of all results)
21034blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
17760sbl-xbl.spamhaus.org (union of all results)
16437xbl.spamhaus.org (union of all results)
15543xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
15541sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
15537cbl.abuseat.org
14887dnsbl.sorbs.net (result 127.0.0.10 = dialup)
13871psbl.surriel.com
10913cn-kr.blackholes.us (result 127.0.0.2 = China)
10913cn-kr.blackholes.us (union of all results)
10413dynablock.njabl.org
8992no-more-funn.moensted.dk (union of all results)
7872unconfirmed.dsbl.org
7791list.dsbl.org
7789dsbl.dnsbl.net.au
7374china.blackholes.us
7171sbl.csma.biz
6179bl.spamcop.net
5368combined-hib.dnsiplists.completewhois.com (union of all results)
5361combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
4778blacklist.spambag.org
4011no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
3806dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3586bl.csma.biz
3539korea.blackholes.us
3505korea.services.net
3163dnsbl.njabl.org (union of all results)
3070l2.spews.dnsbl.sorbs.net
2936no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
2803dnsbl.ahbl.org (union of all results)
2790wpbl.dnsbl.net.au
2724dnsbl.rangers.eu.org (union of all results)
2621dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
2584spamsources.fabel.dk
2533l1.spews.dnsbl.sorbs.net
2524dnsbl.rangers.eu.org (result 127.0.0.2 = dialup)
2427ricn.dnsbl.net.au
2323dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2307dnsbl.regedit64.net
2246unsure.nether.net
2198dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1842spews.dnsbl.net.au
1773brazil.blackholes.us
1755rmst.dnsbl.net.au
1564no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1472dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1456sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1454sbl.spamhaus.org
1449opm.blitzed.org
1448sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1447xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1287xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1287sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1070spam.wytnij.to
981dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
969dnsbl.antispam.or.id
847bl.spamcannibal.org
819japan.blackholes.us
810probes.dnsbl.net.au
711blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
685russia.blackholes.us
625taiwan.blackholes.us
591dnsbl.ahbl.org (result 127.0.0.4 = spam source)
571mexico.blackholes.us
440argentina.blackholes.us
425dnsbl.njabl.org (result 127.0.0.3 = dialup)
414hongkong.blackholes.us
379blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
364turkey.blackholes.us
364tr.countries.nerd.dk
317no-more-funn.moensted.dk (result 127.0.0.9 = misc)
247malaysia.blackholes.us
243mail-abuse.blacklist.jippg.org
239dnsbl.njabl.org (result 127.0.0.4 = spam source)
188query.bondedsender.org (not a blacklist!)
184dnsbl.njabl.org (result 127.0.0.2 = open relay)
173thailand.blackholes.us
173no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
165blackholes.intersil.net
164relays.ordb.org
137dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
121singapore.blackholes.us
113dnsbl.rangers.eu.org (result 127.0.0.16 = spam haven)
95dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
79flowgoaway.com
78blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
72dnsbl.rangers.eu.org (result 127.0.0.8 = spam source)
70ohps.dnsbl.net.au
66multihop.dsbl.org
36blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
34exemptions.ahbl.org (not a blacklist!)
30osps.dnsbl.net.au
30blackholes.uceb.org (union of all results)
24osrs.dnsbl.net.au
21relays.nether.net
18rdts.dnsbl.net.au
15dnsbl.rangers.eu.org (result 127.0.0.4 = virus notices)
14spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
14spamguard.leadmon.net (union of all results)
13blackholes.uceb.org (result 127.0.0.3 = spam source)
12dnsbl.sorbs.net (result 127.0.0.5 = open relay)
11blackholes.brainerd.net
10blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
10dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
9nigeria.blackholes.us
9blackholes.uceb.org (result 127.0.0.6 = spam haven)
9hil.habeas.com
8blackholes.uceb.org (result 127.0.0.2 = open relay)
7combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
6owps.dnsbl.net.au
6dnsbl.ahbl.org (result 127.0.0.15 = open relay)
4tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
4blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
4tor.dnsbl.sectoor.de (union of all results)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
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)
2bl.deadbeef.com
1omrs.dnsbl.net.au
1relays.bl.kundenserver.de
1no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
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
43279(total number of IP addresses whose names were tested, including 485 at SDSC)
20274(union of all domain zones)
15152abuse.rfc-ignorant.org
11221rddn.dnsbl.net.au
8627whois.rfc-ignorant.org (union of all results)
6240whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
5408dynamic.rhs.mailpolice.com
2390whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1939webmail.rhs.mailpolice.com
959rhsbl.ahbl.org
501adv.rhs.mailpolice.com
355bulk.rhs.mailpolice.com
325bl.deadbeef.com
265postmaster.rfc-ignorant.org
149bogusmx.rfc-ignorant.org
143dsn.rfc-ignorant.org (zone not intended for this use)
3porn.rhs.mailpolice.com
2blackhole.securitysage.com

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

HitsDNS Zone
27685(total number of domains tested, including 423 at SDSC)
6751(union of all domain zones)
2662whois.rfc-ignorant.org (union of all results)
2294abuse.rfc-ignorant.org
2168whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1143postmaster.rfc-ignorant.org
1040webmail.rhs.mailpolice.com
1021rhsbl.ahbl.org
749dsn.rfc-ignorant.org
494whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
455bogusmx.rfc-ignorant.org
353bulk.rhs.mailpolice.com
219adv.rhs.mailpolice.com
135bl.deadbeef.com
111blackhole.securitysage.com
97porn.rhs.mailpolice.com
37rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
37rhsbl.sorbs.net (union of all results)
28rddn.dnsbl.net.au (zone not intended for this use)
13ex.dnsbl.org
5dynamic.rhs.mailpolice.com
2fraud.rhs.mailpolice.com
2cart00ney.surriel.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 23 November 2005.