Blacklists Compared

19 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
42849(total number of IP addresses tested, including 496 at SDSC)
36814(union of most IP zones)
28283block.blars.org
22269t1.dnsbl.net.au
21654blackholes.five-ten-sg.com (union of all results)
21330dnsbl.sorbs.net (union of all results)
20416blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
18589sbl-xbl.spamhaus.org (union of all results)
17201xbl.spamhaus.org (union of all results)
16450sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
16445xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
16360cbl.abuseat.org
15151psbl.surriel.com
15046dnsbl.sorbs.net (result 127.0.0.10 = dialup)
10745cn-kr.blackholes.us (result 127.0.0.2 = China)
10745cn-kr.blackholes.us (union of all results)
10349dynablock.njabl.org
9005no-more-funn.moensted.dk (union of all results)
7698unconfirmed.dsbl.org
7620list.dsbl.org
7618dsbl.dnsbl.net.au
7336china.blackholes.us
7287sbl.csma.biz
5769bl.spamcop.net
4812blacklist.spambag.org
4371combined-hib.dnsiplists.completewhois.com (union of all results)
4362combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
3862dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3577bl.csma.biz
3558no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
3409korea.blackholes.us
3404korea.services.net
3397no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
3142l2.spews.dnsbl.sorbs.net
3002dnsbl.njabl.org (union of all results)
2774wpbl.dnsbl.net.au
2686ricn.dnsbl.net.au
2598dnsbl.ahbl.org (union of all results)
2577unsure.nether.net
2558l1.spews.dnsbl.sorbs.net
2556spews.dnsbl.net.au
2534dnsbl.rangers.eu.org (union of all results)
2393spamsources.fabel.dk
2390dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
2340dnsbl.rangers.eu.org (result 127.0.0.2 = dialup)
2285dnsbl.regedit64.net
2077dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1949dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1741rmst.dnsbl.net.au
1703brazil.blackholes.us
1576sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1576sbl.spamhaus.org
1570no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1415probes.dnsbl.net.au
1368xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1368opm.blitzed.org
1367sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1272dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1139sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1136xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1065russia.blackholes.us
1032spam.wytnij.to
901dnsbl.antispam.or.id
872bl.spamcannibal.org
852dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
807japan.blackholes.us
712blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
639dnsbl.ahbl.org (result 127.0.0.4 = spam source)
592taiwan.blackholes.us
490mexico.blackholes.us
428hongkong.blackholes.us
425dnsbl.njabl.org (result 127.0.0.3 = dialup)
421argentina.blackholes.us
377blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
375mail-abuse.blacklist.jippg.org
368dnsbl.njabl.org (result 127.0.0.4 = spam source)
328no-more-funn.moensted.dk (result 127.0.0.9 = misc)
273tr.countries.nerd.dk
268turkey.blackholes.us
240malaysia.blackholes.us
209query.bondedsender.org (not a blacklist!)
162thailand.blackholes.us
160no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
159blackholes.intersil.net
147dnsbl.njabl.org (result 127.0.0.2 = open relay)
137singapore.blackholes.us
130relays.ordb.org
114dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
109dnsbl.rangers.eu.org (result 127.0.0.16 = spam haven)
92blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
91ohps.dnsbl.net.au
90flowgoaway.com
87dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
73dnsbl.rangers.eu.org (result 127.0.0.8 = spam source)
73multihop.dsbl.org
43blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
34osps.dnsbl.net.au
33exemptions.ahbl.org (not a blacklist!)
27blackholes.uceb.org (union of all results)
23rdts.dnsbl.net.au
21osrs.dnsbl.net.au
19relays.nether.net
14blackholes.uceb.org (result 127.0.0.2 = open relay)
13nigeria.blackholes.us
12dnsbl.sorbs.net (result 127.0.0.5 = open relay)
12dnsbl.rangers.eu.org (result 127.0.0.4 = virus notices)
10blackholes.brainerd.net
9blackholes.uceb.org (result 127.0.0.3 = spam source)
9spamguard.leadmon.net (union of all results)
8spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
8combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
8dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
6blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
5blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
5dnsbl.ahbl.org (result 127.0.0.15 = open relay)
4blackholes.uceb.org (result 127.0.0.6 = spam haven)
4owps.dnsbl.net.au
4hil.habeas.com
3tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
3tor.dnsbl.sectoor.de (union of all results)
2omrs.dnsbl.net.au
2blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1combined-hib.dnsiplists.completewhois.com (result 127.0.0.3 = hijacked network)
1dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)

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
42849(total number of IP addresses whose names were tested, including 496 at SDSC)
19836(union of all domain zones)
14706abuse.rfc-ignorant.org
11344rddn.dnsbl.net.au
8432whois.rfc-ignorant.org (union of all results)
6264whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
5372dynamic.rhs.mailpolice.com
2168whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1897webmail.rhs.mailpolice.com
910rhsbl.ahbl.org
499adv.rhs.mailpolice.com
436bulk.rhs.mailpolice.com
324bl.deadbeef.com
252postmaster.rfc-ignorant.org
133dsn.rfc-ignorant.org (zone not intended for this use)
133bogusmx.rfc-ignorant.org
5porn.rhs.mailpolice.com
3blackhole.securitysage.com

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

HitsDNS Zone
29949(total number of domains tested, including 431 at SDSC)
6966(union of all domain zones)
2657whois.rfc-ignorant.org (union of all results)
2243abuse.rfc-ignorant.org
2177whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1158postmaster.rfc-ignorant.org
1121rhsbl.ahbl.org
1008webmail.rhs.mailpolice.com
761dsn.rfc-ignorant.org
480whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
473bogusmx.rfc-ignorant.org
398bulk.rhs.mailpolice.com
218adv.rhs.mailpolice.com
130bl.deadbeef.com
123blackhole.securitysage.com
116porn.rhs.mailpolice.com
39rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
39rhsbl.sorbs.net (union of all results)
28rddn.dnsbl.net.au (zone not intended for this use)
15ex.dnsbl.org
5dynamic.rhs.mailpolice.com
2cart00ney.surriel.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 30 November 2005.