Blacklists Compared

25 March 2006

[ 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
84438(total number of IP addresses tested, including 509 at SDSC)
75776(union of most IP zones)
52681block.blars.org
48427dnsbl.sorbs.net (union of all results)
44871t1.dnsbl.net.au
40075dnsbl.sorbs.net (result 127.0.0.10 = dialup)
38828sbl-xbl.spamhaus.org (union of all results)
36721xbl.spamhaus.org (union of all results)
35092sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
35089cbl.abuseat.org
35088xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
29798psbl.surriel.com
29731dynablock.njabl.org
28688blackholes.five-ten-sg.com (union of all results)
27902blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
18492no-more-funn.moensted.dk (union of all results)
15295cn-kr.blackholes.us (result 127.0.0.2 = China)
15295cn-kr.blackholes.us (union of all results)
14277sbl.csma.biz
12268blacklist.spambag.org
11863unconfirmed.dsbl.org
11723list.dsbl.org
11720dsbl.dnsbl.net.au
11661china.blackholes.us
11069bl.spamcop.net
10536dnsbl-1.uceprotect.net
8193no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
7578unsure.nether.net
7561l2.spews.dnsbl.sorbs.net
7152dnsbl.sorbs.net (result 127.0.0.6 = spam source)
6823l1.spews.dnsbl.sorbs.net
6822spews.dnsbl.net.au
6776combined-hib.dnsiplists.completewhois.com (union of all results)
6773combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
5985wpbl.dnsbl.net.au
5923bl.csma.biz
5101dnsbl-2.uceprotect.net
4972no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
4891dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
4593no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
4592dnsbl.njabl.org (union of all results)
4255rmst.dnsbl.net.au
3694korea.services.net
3634korea.blackholes.us
3542dnsbl.ahbl.org (union of all results)
3036dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2953spamsources.fabel.dk
2811sbl.spamhaus.org
2800sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
2606ricn.dnsbl.net.au
2425dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2121brazil.blackholes.us
1983xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1983sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1975mail-abuse.blacklist.jippg.org
1714spam.wytnij.to
1695xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1695sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1695opm.blitzed.org
1653dnsbl-3.uceprotect.net
1501russia.blackholes.us
1467japan.blackholes.us
1260probes.dnsbl.net.au
1236dnsbl.njabl.org (result 127.0.0.3 = dialup)
1131taiwan.blackholes.us
1098dnsbl.ahbl.org (result 127.0.0.4 = spam source)
1097bl.spamcannibal.org
1046tr.countries.nerd.dk
1042turkey.blackholes.us
1026dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1011dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
741mexico.blackholes.us
566argentina.blackholes.us
490blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
420no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
418malaysia.blackholes.us
414hongkong.blackholes.us
402thailand.blackholes.us
315no-more-funn.moensted.dk (result 127.0.0.9 = misc)
305singapore.blackholes.us
264dnsbl.antispam.or.id
216dnsbl.njabl.org (result 127.0.0.2 = open relay)
192relays.ordb.org
186blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
170blackholes.intersil.net
147query.bondedsender.org (not a blacklist!)
117ohps.dnsbl.net.au
115multihop.dsbl.org
111dnsbl.njabl.org (result 127.0.0.4 = spam source)
77flowgoaway.com
73dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
72blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
64dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
30blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
28osps.dnsbl.net.au
24relays.nether.net
23blackholes.uceb.org (union of all results)
18tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
18tor.dnsbl.sectoor.de (union of all results)
15osrs.dnsbl.net.au
15dnsbl.ahbl.org (result 127.0.0.15 = open relay)
14exemptions.ahbl.org (not a blacklist!)
13dnsbl.sorbs.net (result 127.0.0.5 = open relay)
13rdts.dnsbl.net.au
12nigeria.blackholes.us
11spamguard.leadmon.net (union of all results)
8spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
7blackholes.uceb.org (result 127.0.0.3 = spam source)
7blackholes.uceb.org (result 127.0.0.6 = spam haven)
7hil.habeas.com
7dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
6blackholes.uceb.org (result 127.0.0.2 = open relay)
5blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
5dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
4blackholes.brainerd.net
3blackholes.uceb.org (result 127.0.0.5 = dialup)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3owps.dnsbl.net.au
3spamguard.leadmon.net (result 127.0.0.3 = spam source)
3blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
3combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
2spamsites.dnsbl.net.au
2bl.deadbeef.com
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)
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
84438(total number of IP addresses whose names were tested, including 509 at SDSC)
49812(union of all domain zones)
33693rddn.dnsbl.net.au
32997abuse.rfc-ignorant.org
24022dynamic.rhs.mailpolice.com
23382whois.rfc-ignorant.org (union of all results)
19401whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
3981whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2578webmail.rhs.mailpolice.com
1247rhsbl.ahbl.org
722bl.deadbeef.com
541adv.rhs.mailpolice.com
325postmaster.rfc-ignorant.org
236bulk.rhs.mailpolice.com
129bogusmx.rfc-ignorant.org
122dsn.rfc-ignorant.org (zone not intended for this use)
2porn.rhs.mailpolice.com
1blackhole.securitysage.com

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

HitsDNS Zone
37129(total number of domains tested, including 409 at SDSC)
7399(union of all domain zones)
2964whois.rfc-ignorant.org (union of all results)
2473whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2191abuse.rfc-ignorant.org
1135postmaster.rfc-ignorant.org
997rhsbl.ahbl.org
951webmail.rhs.mailpolice.com
841bogusmx.rfc-ignorant.org
824dsn.rfc-ignorant.org
491whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
197adv.rhs.mailpolice.com
177bulk.rhs.mailpolice.com
116blackhole.securitysage.com
115bl.deadbeef.com
110porn.rhs.mailpolice.com
38rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
38rhsbl.sorbs.net (union of all results)
18rddn.dnsbl.net.au (zone not intended for this use)
16ex.dnsbl.org
9dynamic.rhs.mailpolice.com
3cart00ney.surriel.com
2fraud.rhs.mailpolice.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 12 April 2006.