Blacklists Compared

31 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
29800(total number of IP addresses tested, including 430 at SDSC)
24196(union of most IP zones)
18335t1.dnsbl.net.au
17330block.blars.org
15837blackholes.five-ten-sg.com (union of all results)
15121blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
12245sbl-xbl.spamhaus.org (union of all results)
12120dnsbl.sorbs.net (union of all results)
10842xbl.spamhaus.org (union of all results)
10755cbl.abuseat.org
10732sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
10730xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
8669dynablock.njabl.org
8255dnsbl.sorbs.net (result 127.0.0.10 = dialup)
8117unconfirmed.dsbl.org
8008list.dsbl.org
8007dsbl.dnsbl.net.au
7768no-more-funn.moensted.dk (union of all results)
6977cn-kr.blackholes.us (union of all results)
5908psbl.surriel.com
4545ipwhois.rfc-ignorant.org
4462sbl.csma.biz
4184cn-kr.blackholes.us (result 127.0.0.3 = Korea)
4184korea.blackholes.us
4175korea.services.net
4045no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
3886dnsbl.njabl.org (union of all results)
3813bl.spamcop.net
3504rmst.dnsbl.net.au
3121dnsbl.ahbl.org (union of all results)
2793cn-kr.blackholes.us (result 127.0.0.2 = China)
2793china.blackholes.us
2624blacklist.spambag.org
2542l2.spews.dnsbl.sorbs.net
2477wpbl.dnsbl.net.au
2122l1.spews.dnsbl.sorbs.net
2121spews.dnsbl.net.au
2044dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2022unsure.nether.net
1922no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1912dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1871pdl.blackholes.us
1792ricn.dnsbl.net.au
1701spamsources.fabel.dk
1643dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1528sbl.spamhaus.org
1525sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1507dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1401dnsbl.njabl.org (result 127.0.0.3 = dialup)
1222dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1212bl.csma.biz
1159dnsbl.ahbl.org (result 127.0.0.4 = spam source)
1140xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1140sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1140opm.blitzed.org
1032spam.wytnij.to
1006work.drbl.croco.net
902no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
864japan.blackholes.us
720brazil.blackholes.us
680no-more-funn.moensted.dk (result 127.0.0.9 = misc)
639level3.blackholes.us
603dun.dnsrbl.net
589probes.dnsbl.net.au
565spamguard.leadmon.net (union of all results)
523ybl.megacity.org
512spamguard.leadmon.net (result 127.0.0.2 = dialup)
476dnsbl.rangers.eu.org (union of all results)
459taiwan.blackholes.us
441cw.blackholes.us
427dnsbl.antispam.or.id
403dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
383blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
376comcast.blackholes.us
330blackholes.intersil.net
321hongkong.blackholes.us
295rr.blackholes.us
291charter.blackholes.us
273dnsbl.rangers.eu.org (result 127.0.0.2 = dialup)
270relays.ordb.org
264dnsbl.njabl.org (result 127.0.0.2 = source or relay)
257no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
236blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
225qwest.blackholes.us
194dnsbl.njabl.org (result 127.0.0.4 = spam source)
192dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
191interbusiness.blackholes.us
189mexico.blackholes.us
184tr.countries.nerd.dk
181turkey.blackholes.us
158relays.visi.com
156wanadoo-fr.blackholes.us
147argentina.blackholes.us
145russia.blackholes.us
131flowgoaway.com
130dnsbl.rangers.eu.org (result 127.0.0.16 = spam haven)
127verio.blackholes.us
113xo.blackholes.us
104ohps.dnsbl.net.au
100singapore.blackholes.us
99infolink.blackholes.us
97multihop.dsbl.org
92above.blackholes.us
83malaysia.blackholes.us
81dialup.blacklist.jippg.org (union of all results)
79osps.dnsbl.net.au
77dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
74osrs.dnsbl.net.au
74relays.nether.net
65he.blackholes.us
64dnsbl.sorbs.net (result 127.0.0.5 = open relay)
62internap.blackholes.us
61mail-abuse.blacklist.jippg.org
56lauderdale.blackholes.us
55thailand.blackholes.us
55bellsouth.blackholes.us
53spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
52ph.rbl.cluecentral.net
48cybercon.blackholes.us
46dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
45inflow.blackholes.us
43dnsbl.rangers.eu.org (result 127.0.0.8 = spam source)
43blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
40covad.blackholes.us
39dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
39query.bondedsender.org (not a blacklist!)
35telstra.blackholes.us
34yipes.blackholes.us
33rdts.dnsbl.net.au
32blackholes.uceb.org (union of all results)
31swbell.blackholes.us
30blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
30blackholes.brainerd.net
29dnsbl.rangers.eu.org (result 127.0.0.4 = virus notices)
25rogers.blackholes.us
24exemptions.ahbl.org (not a blacklist!)
23eli.blackholes.us
23hil.habeas.com
22nigeria.blackholes.us
21a2000.blackholes.us
18blackholes.uceb.org (result 127.0.0.2 = open relay)
17rackspace.blackholes.us
17broadwing.blackholes.us
16sbbl.they.com
16dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
15blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
15satos.rbl.cluecentral.net
12blackholes.uceb.org (result 127.0.0.3 = spam source)
12relays.bl.kundenserver.de
11olm.blackholes.us
10spam.dnsrbl.net
9affinity.blackholes.us
8navisite.blackholes.us
7epoch.blackholes.us
7burst.blackholes.us
7blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
7bl.deadbeef.com
6no-more-funn.moensted.dk (result 127.0.0.11 = repeated probes)
5pajo.blackholes.us
5maxim.blackholes.us
4dev.null.dk
4dialup.blacklist.jippg.org (result 127.0.0.4 = dialup in Japan)
4dnsbl.ahbl.org (result 127.0.0.15 = open relay)
3owps.dnsbl.net.au
3omrs.dnsbl.net.au
3dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)
2ciberlynx.blackholes.us
2no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
2no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
2blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
1blackholes.uceb.org (result 127.0.0.4 = spam source network)
1blackholes.uceb.org (result 127.0.0.6 = spam haven)
1dnsbl.rangers.eu.org (result 127.0.0.32 = worm source)
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)

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
29800(total number of IP addresses whose names were tested, including 430 at SDSC)
12896(union of all domain zones)
9297abuse.rfc-ignorant.org
7102rddn.dnsbl.net.au
3478whois.rfc-ignorant.org (union of all results)
2088whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
1390whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
814bulk.rhs.mailpolice.com
747rhsbl.ahbl.org
239bl.deadbeef.com
219blackhole.securitysage.com
22postmaster.rfc-ignorant.org
21dsn.rfc-ignorant.org (zone not intended for this use)
7porn.rhs.mailpolice.com
2bogusmx.rfc-ignorant.org

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

HitsDNS Zone
26649(total number of domains tested, including 305 at SDSC)
8682(union of all domain zones)
4170whois.rfc-ignorant.org (union of all results)
3653whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2613abuse.rfc-ignorant.org
1370bulk.rhs.mailpolice.com
1207rhsbl.ahbl.org
1030postmaster.rfc-ignorant.org
815dsn.rfc-ignorant.org
517whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
349blackhole.securitysage.com
272bogusmx.rfc-ignorant.org
222rddn.dnsbl.net.au (zone not intended for this use)
204bl.deadbeef.com
63porn.rhs.mailpolice.com
58ex.dnsbl.org (union of all results)
53ex.dnsbl.org (result 127.0.0.2 = spamsites)
37rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
37rhsbl.sorbs.net (union of all results)
5ex.dnsbl.org (result 127.0.0.3 = spam source)
3rhsbl.sorbs.net (result 127.0.0.12 = domain does not send mail)
3cart00ney.surriel.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 11 August 2004.