Blacklists Compared

10 December 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
49425(total number of IP addresses tested, including 487 at SDSC)
42473(union of most IP zones)
31410block.blars.org
24747dnsbl.sorbs.net (union of all results)
24392blackholes.five-ten-sg.com (union of all results)
23491t1.dnsbl.net.au
23161blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
18940sbl-xbl.spamhaus.org (union of all results)
18392dnsbl.sorbs.net (result 127.0.0.10 = dialup)
17198xbl.spamhaus.org (union of all results)
16449cbl.abuseat.org
16378xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
16378sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
12615dynablock.njabl.org
12578psbl.surriel.com
11354cn-kr.blackholes.us (result 127.0.0.2 = China)
11354cn-kr.blackholes.us (union of all results)
10240no-more-funn.moensted.dk (union of all results)
8178china.blackholes.us
7699dsbl.dnsbl.net.au
7285unconfirmed.dsbl.org
7231list.dsbl.org
6342blacklist.spambag.org
6259sbl.csma.biz
5696bl.spamcop.net
5064combined-hib.dnsiplists.completewhois.com (union of all results)
5057combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
4324dnsbl.sorbs.net (result 127.0.0.6 = spam source)
4273no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
3593l2.spews.dnsbl.sorbs.net
3541no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
3176korea.blackholes.us
3167korea.services.net
3089ricn.dnsbl.net.au
3068l1.spews.dnsbl.sorbs.net
3063spews.dnsbl.net.au
2976wpbl.dnsbl.net.au
2931dnsbl.njabl.org (union of all results)
2803dnsbl.regedit64.net
2799dnsbl.ahbl.org (union of all results)
2723unsure.nether.net
2715bl.csma.biz
2685dnsbl.rangers.eu.org (union of all results)
2510spamsources.fabel.dk
2490dnsbl.rangers.eu.org (result 127.0.0.2 = dialup)
2490rmst.dnsbl.net.au
2306sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
2306sbl.spamhaus.org
2172dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
2113dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1980no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1856dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1703russia.blackholes.us
1691brazil.blackholes.us
1291opm.blitzed.org
1193sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1184xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1182dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1126spam.wytnij.to
1083japan.blackholes.us
944xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
933sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
931dnsbl.ahbl.org (result 127.0.0.4 = spam source)
925dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
857dnsbl.antispam.or.id
851bl.spamcannibal.org
798probes.dnsbl.net.au
657blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
591mexico.blackholes.us
590tr.countries.nerd.dk
587turkey.blackholes.us
561taiwan.blackholes.us
492dnsbl.njabl.org (result 127.0.0.3 = dialup)
441argentina.blackholes.us
427mail-abuse.blacklist.jippg.org
409blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
273no-more-funn.moensted.dk (result 127.0.0.9 = misc)
271malaysia.blackholes.us
264hongkong.blackholes.us
229query.bondedsender.org (not a blacklist!)
219no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
210thailand.blackholes.us
185dnsbl.njabl.org (result 127.0.0.2 = open relay)
174blackholes.intersil.net
172singapore.blackholes.us
158relays.ordb.org
146dnsbl.njabl.org (result 127.0.0.4 = spam source)
106dnsbl.rangers.eu.org (result 127.0.0.16 = spam haven)
104blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
93flowgoaway.com
83dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
71dnsbl.rangers.eu.org (result 127.0.0.8 = spam source)
71multihop.dsbl.org
70ohps.dnsbl.net.au
54dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
39blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
34osrs.dnsbl.net.au
23blackholes.uceb.org (union of all results)
21spamguard.leadmon.net (union of all results)
20exemptions.ahbl.org (not a blacklist!)
18spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
17dnsbl.rangers.eu.org (result 127.0.0.4 = virus notices)
17osps.dnsbl.net.au
16relays.nether.net
15nigeria.blackholes.us
14blackholes.brainerd.net
13blackholes.uceb.org (result 127.0.0.6 = spam haven)
12rdts.dnsbl.net.au
12blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
11dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
9dnsbl.sorbs.net (result 127.0.0.5 = open relay)
9dnsbl.ahbl.org (result 127.0.0.15 = open relay)
7hil.habeas.com
7combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
6blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
5blackholes.uceb.org (result 127.0.0.3 = spam source)
5blackholes.uceb.org (result 127.0.0.2 = open relay)
4owps.dnsbl.net.au
3tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
3spamguard.leadmon.net (result 127.0.0.3 = spam source)
3blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
3tor.dnsbl.sectoor.de (union of all results)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1dnsbl.rangers.eu.org (result 127.0.0.32 = worm source)
1spamsites.dnsbl.net.au
1omrs.dnsbl.net.au
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
1no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)

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
49425(total number of IP addresses whose names were tested, including 487 at SDSC)
24108(union of all domain zones)
17107abuse.rfc-ignorant.org
13861rddn.dnsbl.net.au
10555whois.rfc-ignorant.org (union of all results)
7962whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
6463dynamic.rhs.mailpolice.com
2593whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2025webmail.rhs.mailpolice.com
1253rhsbl.ahbl.org
497adv.rhs.mailpolice.com
477bulk.rhs.mailpolice.com
333bl.deadbeef.com
261postmaster.rfc-ignorant.org
146bogusmx.rfc-ignorant.org
138dsn.rfc-ignorant.org (zone not intended for this use)
5porn.rhs.mailpolice.com
1cart00ney.surriel.com

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

HitsDNS Zone
31992(total number of domains tested, including 430 at SDSC)
6883(union of all domain zones)
2586whois.rfc-ignorant.org (union of all results)
2316abuse.rfc-ignorant.org
2056whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1140postmaster.rfc-ignorant.org
1110webmail.rhs.mailpolice.com
897rhsbl.ahbl.org
785dsn.rfc-ignorant.org
530whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
511bogusmx.rfc-ignorant.org
469bulk.rhs.mailpolice.com
232adv.rhs.mailpolice.com
130blackhole.securitysage.com
128bl.deadbeef.com
118porn.rhs.mailpolice.com
44rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
44rhsbl.sorbs.net (union of all results)
33rddn.dnsbl.net.au (zone not intended for this use)
12ex.dnsbl.org
10dynamic.rhs.mailpolice.com
2cart00ney.surriel.com
1fraud.rhs.mailpolice.com

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