Blacklists Compared

26 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
42889(total number of IP addresses tested, including 474 at SDSC)
36976(union of most IP zones)
28197block.blars.org
22155dnsbl.sorbs.net (union of all results)
21264blackholes.five-ten-sg.com (union of all results)
20797t1.dnsbl.net.au
20130blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
16992sbl-xbl.spamhaus.org (union of all results)
15851dnsbl.sorbs.net (result 127.0.0.10 = dialup)
15388xbl.spamhaus.org (union of all results)
14621xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
14617sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
14510cbl.abuseat.org
13339psbl.surriel.com
10784dynablock.njabl.org
10574cn-kr.blackholes.us (result 127.0.0.2 = China)
10574cn-kr.blackholes.us (union of all results)
8447no-more-funn.moensted.dk (union of all results)
7099china.blackholes.us
6894dsbl.dnsbl.net.au
6884unconfirmed.dsbl.org
6852list.dsbl.org
6333sbl.csma.biz
5623bl.spamcop.net
5009blacklist.spambag.org
4351combined-hib.dnsiplists.completewhois.com (union of all results)
4346combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
4261dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3475korea.blackholes.us
3463korea.services.net
3287no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
3197l2.spews.dnsbl.sorbs.net
3170ricn.dnsbl.net.au
3082no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
3007dnsbl.njabl.org (union of all results)
2933bl.csma.biz
2849dnsbl.rangers.eu.org (union of all results)
2675l1.spews.dnsbl.sorbs.net
2675spews.dnsbl.net.au
2656wpbl.dnsbl.net.au
2640dnsbl.rangers.eu.org (result 127.0.0.2 = dialup)
2617dnsbl.ahbl.org (union of all results)
2383unsure.nether.net
2144dnsbl.regedit64.net
2119spamsources.fabel.dk
1999dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1924russia.blackholes.us
1838dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1827dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
1703sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1703sbl.spamhaus.org
1685brazil.blackholes.us
1607no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1516rmst.dnsbl.net.au
1196dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1163sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1162opm.blitzed.org
1161xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1038sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1036xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1035spam.wytnij.to
926probes.dnsbl.net.au
864bl.spamcannibal.org
856dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
840japan.blackholes.us
770dnsbl.antispam.or.id
768dnsbl.ahbl.org (result 127.0.0.4 = spam source)
649blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
563taiwan.blackholes.us
549mail-abuse.blacklist.jippg.org
455mexico.blackholes.us
434dnsbl.njabl.org (result 127.0.0.4 = spam source)
402dnsbl.njabl.org (result 127.0.0.3 = dialup)
383argentina.blackholes.us
363tr.countries.nerd.dk
361turkey.blackholes.us
346blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
320no-more-funn.moensted.dk (result 127.0.0.9 = misc)
310hongkong.blackholes.us
235malaysia.blackholes.us
190query.bondedsender.org (not a blacklist!)
180thailand.blackholes.us
180dnsbl.njabl.org (result 127.0.0.2 = open relay)
180no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
156blackholes.intersil.net
153singapore.blackholes.us
145relays.ordb.org
113dnsbl.rangers.eu.org (result 127.0.0.16 = spam haven)
99blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
95flowgoaway.com
89dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
86dnsbl.rangers.eu.org (result 127.0.0.8 = spam source)
83dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
65ohps.dnsbl.net.au
64multihop.dsbl.org
33osrs.dnsbl.net.au
29blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
20osps.dnsbl.net.au
20rdts.dnsbl.net.au
19nigeria.blackholes.us
18exemptions.ahbl.org (not a blacklist!)
18blackholes.uceb.org (union of all results)
17relays.nether.net
13spamguard.leadmon.net (union of all results)
12spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
10dnsbl.rangers.eu.org (result 127.0.0.4 = virus notices)
9dnsbl.sorbs.net (result 127.0.0.5 = open relay)
8blackholes.uceb.org (result 127.0.0.2 = open relay)
8hil.habeas.com
8dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
7blackholes.uceb.org (result 127.0.0.6 = spam haven)
6tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
6blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
6tor.dnsbl.sectoor.de (union of all results)
5owps.dnsbl.net.au
5blackholes.brainerd.net
5dnsbl.ahbl.org (result 127.0.0.15 = open relay)
4combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
3blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
3bl.deadbeef.com
2blackholes.uceb.org (result 127.0.0.3 = spam source)
2no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
2blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
1blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
1omrs.dnsbl.net.au
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
1combined-hib.dnsiplists.completewhois.com (result 127.0.0.3 = hijacked network)
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
42889(total number of IP addresses whose names were tested, including 474 at SDSC)
20482(union of all domain zones)
14932abuse.rfc-ignorant.org
11936rddn.dnsbl.net.au
8627whois.rfc-ignorant.org (union of all results)
6463whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
5851dynamic.rhs.mailpolice.com
2164whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1841webmail.rhs.mailpolice.com
1001rhsbl.ahbl.org
503bulk.rhs.mailpolice.com
449adv.rhs.mailpolice.com
348bl.deadbeef.com
225postmaster.rfc-ignorant.org
127bogusmx.rfc-ignorant.org
125dsn.rfc-ignorant.org (zone not intended for this use)
5blackhole.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
32360(total number of domains tested, including 413 at SDSC)
7396(union of all domain zones)
2825whois.rfc-ignorant.org (union of all results)
2356abuse.rfc-ignorant.org
2304whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1188webmail.rhs.mailpolice.com
1161postmaster.rfc-ignorant.org
1138rhsbl.ahbl.org
790dsn.rfc-ignorant.org
549bogusmx.rfc-ignorant.org
521whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
492bulk.rhs.mailpolice.com
190adv.rhs.mailpolice.com
139bl.deadbeef.com
135blackhole.securitysage.com
127porn.rhs.mailpolice.com
41rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
41rhsbl.sorbs.net (union of all results)
30rddn.dnsbl.net.au (zone not intended for this use)
15ex.dnsbl.org
9dynamic.rhs.mailpolice.com
2cart00ney.surriel.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 8 December 2005.