Blacklists Compared

24 July 2004

[ 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
30923(total number of IP addresses tested, including 237 at SDSC)
25375(union of most IP zones)
19484t1.dnsbl.net.au
18455block.blars.org
17010blackholes.five-ten-sg.com (union of all results)
16293blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
13164dnsbl.sorbs.net (union of all results)
13134sbl-xbl.spamhaus.org (union of all results)
11844xbl.spamhaus.org (union of all results)
11751cbl.abuseat.org
11739sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
11738xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
9657dynablock.njabl.org
9316unconfirmed.dsbl.org
9204list.dsbl.org
9201dsbl.dnsbl.net.au
9184dnsbl.sorbs.net (result 127.0.0.10 = dialup)
8965psbl.surriel.com
8336no-more-funn.moensted.dk (union of all results)
7118cn-kr.blackholes.us (union of all results)
4876ipwhois.rfc-ignorant.org
4766sbl.csma.biz
4476dnsbl.njabl.org (union of all results)
4352no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
4347cn-kr.blackholes.us (result 127.0.0.3 = Korea)
4347korea.blackholes.us
4347bl.spamcop.net
4343korea.services.net
3445rmst.dnsbl.net.au
3312dnsbl.ahbl.org (union of all results)
2771cn-kr.blackholes.us (result 127.0.0.2 = China)
2771china.blackholes.us
2683l2.spews.dnsbl.sorbs.net
2659blacklist.spambag.org
2616wpbl.dnsbl.net.au
2277dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2183l1.spews.dnsbl.sorbs.net
2177spews.dnsbl.net.au
2165unsure.nether.net
2146no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
2134dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2112pdl.blackholes.us
1910spamsources.fabel.dk
1876dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1723ricn.dnsbl.net.au
1699dnsbl.njabl.org (result 127.0.0.3 = dialup)
1694dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1420sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1420sbl.spamhaus.org
1307bl.csma.biz
1280xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1280sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1280opm.blitzed.org
1119dnsbl.ahbl.org (result 127.0.0.4 = spam source)
1111dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1083work.drbl.croco.net
1055spam.wytnij.to
938no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
883brazil.blackholes.us
878japan.blackholes.us
707no-more-funn.moensted.dk (result 127.0.0.9 = misc)
692dun.dnsrbl.net
679probes.dnsbl.net.au
668spamguard.leadmon.net (union of all results)
665level3.blackholes.us
621spamguard.leadmon.net (result 127.0.0.2 = dialup)
559ybl.megacity.org
486cw.blackholes.us
484dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
478comcast.blackholes.us
471taiwan.blackholes.us
443dnsbl.antispam.or.id
423dnsbl.rangers.eu.org (union of all results)
387rr.blackholes.us
372hongkong.blackholes.us
359dnsbl.njabl.org (result 127.0.0.2 = source or relay)
353blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
339relays.ordb.org
296mexico.blackholes.us
296blackholes.intersil.net
290charter.blackholes.us
269blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
241no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
233dnsbl.rangers.eu.org (result 127.0.0.2 = dialup)
224dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
213qwest.blackholes.us
210relays.visi.com
195interbusiness.blackholes.us
181tr.countries.nerd.dk
180turkey.blackholes.us
171wanadoo-fr.blackholes.us
167dnsbl.njabl.org (result 127.0.0.4 = spam source)
158dialup.blacklist.jippg.org (union of all results)
152dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
150argentina.blackholes.us
135flowgoaway.com
133dnsbl.rangers.eu.org (result 127.0.0.16 = spam haven)
122verio.blackholes.us
115osps.dnsbl.net.au
112xo.blackholes.us
107russia.blackholes.us
100singapore.blackholes.us
98ohps.dnsbl.net.au
98multihop.dsbl.org
94infolink.blackholes.us
74malaysia.blackholes.us
74relays.nether.net
71above.blackholes.us
70osrs.dnsbl.net.au
66internap.blackholes.us
66he.blackholes.us
62dnsbl.sorbs.net (result 127.0.0.5 = open relay)
61mail-abuse.blacklist.jippg.org
58bellsouth.blackholes.us
53thailand.blackholes.us
52telstra.blackholes.us
52rogers.blackholes.us
52dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
51cybercon.blackholes.us
51ph.rbl.cluecentral.net
47spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
43dnsbl.rangers.eu.org (result 127.0.0.8 = spam source)
40covad.blackholes.us
39swbell.blackholes.us
39blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
37inflow.blackholes.us
37dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
37rdts.dnsbl.net.au
35blackholes.uceb.org (union of all results)
33yipes.blackholes.us
29blackholes.brainerd.net
28a2000.blackholes.us
28hil.habeas.com
28query.bondedsender.org (not a blacklist!)
27rackspace.blackholes.us
26blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
24eli.blackholes.us
21blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
20broadwing.blackholes.us
18nigeria.blackholes.us
18blackholes.uceb.org (result 127.0.0.3 = spam source)
18exemptions.ahbl.org (not a blacklist!)
17lauderdale.blackholes.us
15satos.rbl.cluecentral.net
14sbbl.they.com
13dnsbl.rangers.eu.org (result 127.0.0.4 = virus notices)
13dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
12blackholes.uceb.org (result 127.0.0.2 = open relay)
11relays.bl.kundenserver.de
10olm.blackholes.us
8maxim.blackholes.us
8epoch.blackholes.us
8burst.blackholes.us
7pajo.blackholes.us
7blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
7bl.deadbeef.com
7dnsbl.ahbl.org (result 127.0.0.15 = open relay)
6dialup.blacklist.jippg.org (result 127.0.0.4 = dialup in Japan)
5affinity.blackholes.us
5owps.dnsbl.net.au
4navisite.blackholes.us
4blackholes.uceb.org (result 127.0.0.6 = spam haven)
4dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)
3no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
3spam.dnsrbl.net
2ciberlynx.blackholes.us
2dev.null.dk
2no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
2no-more-funn.moensted.dk (result 127.0.0.11 = repeated probes)
2blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
1blackholes.uceb.org (result 127.0.0.4 = spam source network)
1dnsbl.rangers.eu.org (result 127.0.0.32 = worm source)
1omrs.dnsbl.net.au
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
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
30923(total number of IP addresses whose names were tested, including 237 at SDSC)
13858(union of all domain zones)
10165abuse.rfc-ignorant.org
8018rddn.dnsbl.net.au
3765whois.rfc-ignorant.org (union of all results)
2349whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
1416whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
784rhsbl.ahbl.org
751bulk.rhs.mailpolice.com
250bl.deadbeef.com
220blackhole.securitysage.com
24postmaster.rfc-ignorant.org
21dsn.rfc-ignorant.org (zone not intended for this use)
17porn.rhs.mailpolice.com
1bogusmx.rfc-ignorant.org
1ex.dnsbl.org (result 127.0.0.2 = spamsites)
1ex.dnsbl.org (union of all results)

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

HitsDNS Zone
27834(total number of domains tested, including 124 at SDSC)
8700(union of all domain zones)
4272whois.rfc-ignorant.org (union of all results)
3772whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2585abuse.rfc-ignorant.org
1210bulk.rhs.mailpolice.com
1171rhsbl.ahbl.org
1046postmaster.rfc-ignorant.org
849dsn.rfc-ignorant.org
500whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
363blackhole.securitysage.com
301bogusmx.rfc-ignorant.org
232bl.deadbeef.com
95rddn.dnsbl.net.au (zone not intended for this use)
64ex.dnsbl.org (union of all results)
60ex.dnsbl.org (result 127.0.0.2 = spamsites)
48porn.rhs.mailpolice.com
39rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
39rhsbl.sorbs.net (union of all results)
5ex.dnsbl.org (result 127.0.0.3 = spam source)
2rhsbl.sorbs.net (result 127.0.0.12 = domain does not send mail)
2cart00ney.surriel.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 4 August 2004.