Blacklists Compared

14 February 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
23292(total number of IP addresses tested, including 363 at SDSC)
17279(union of most IP zones)
11685t1.dnsbl.net.au
10211dnsbl.sorbs.net (union of all results)
9863block.blars.org
9166blackholes.five-ten-sg.com (union of all results)
8069sbl-xbl.spamhaus.org (union of all results)
8025blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
7516unconfirmed.dsbl.org
7241dsbl.dnsbl.net.au
7241list.dsbl.org
7027cbl.abuseat.org
7007xbl.spamhaus.org
7007sbl-xbl.spamhaus.org (result 127.0.0.4 = Spamhaus XBL)
6561dnsbl.sorbs.net (result 127.0.0.10 = dialup)
6554dynablock.njabl.org
5259dnsbl.njabl.org (union of all results)
4530no-more-funn.moensted.dk (union of all results)
3772sbl.csma.biz
3705bl.spamcop.net
3401dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2999cn-kr.blackholes.us (union of all results)
2816l2.spews.dnsbl.sorbs.net
2470dnsbl.ahbl.org (union of all results)
2463ipwhois.rfc-ignorant.org
2405l1.spews.dnsbl.sorbs.net
2405spews.dnsbl.net.au
2304dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
2236spam.wytnij.to
2205no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2197dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2048psbl.surriel.com
2034unsure.nether.net
1874dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1807no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1629bl.csma.biz
1577cn-kr.blackholes.us (result 127.0.0.2 = China)
1577china.blackholes.us
1422cn-kr.blackholes.us (result 127.0.0.3 = Korea)
1422korea.blackholes.us
1401korea.services.net
1260sbl.spamhaus.org
1256sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1134dnsbl.njabl.org (result 127.0.0.3 = dialup)
1125rmst.dnsbl.net.au
969spamsources.fabel.dk
900comcast.blackholes.us
845wpbl.dnsbl.net.au
800blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
796opm.blitzed.org
730relays.visi.com
670ricn.dnsbl.net.au
659ybl.megacity.org
652dnsbl.sorbs.net (result 127.0.0.6 = spam source)
568spamguard.leadmon.net (union of all results)
550spamguard.leadmon.net (result 127.0.0.2 = dialup)
518cw.blackholes.us
513blacklist.spambag.org
494pss.spambusters.org.ar
489probes.dnsbl.net.au
461brazil.blackholes.us
427work.drbl.croco.net
417level3.blackholes.us
412rr.blackholes.us
377dnsbl.njabl.org (result 127.0.0.4 = spam source)
366dnsbl.njabl.org (result 127.0.0.2 = source or relay)
296blackholes.intersil.net
281hil.habeas.com
280relays.ordb.org
276no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
268dnsbl.ahbl.org (result 127.0.0.4 = spam source)
266charter.blackholes.us
253multihop.dsbl.org
245taiwan.blackholes.us
244dnsbl.antispam.or.id
232wanadoo-fr.blackholes.us
230blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
226japan.blackholes.us
212no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
193bellsouth.blackholes.us
190dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
184qwest.blackholes.us
166osrs.dnsbl.net.au
1663y.spam.mrs.kithrup.com
165mexico.blackholes.us
156verio.blackholes.us
138russia.blackholes.us
137interbusiness.blackholes.us
136internap.blackholes.us
134infolink.blackholes.us
128dialup.blacklist.jippg.org (union of all results)
127dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
126tr.countries.nerd.dk
125argentina.blackholes.us
124mail-abuse.blacklist.jippg.org
123turkey.blackholes.us
108dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
105relays.nether.net
102hongkong.blackholes.us
99xo.blackholes.us
94dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
91dnsbl.sorbs.net (result 127.0.0.5 = open relay)
90osps.dnsbl.net.au
83above.blackholes.us
79he.blackholes.us
77query.bondedsender.org (not a blacklist!)
76ohps.dnsbl.net.au
75flowgoaway.com
73telstra.blackholes.us
69dun.dnsrbl.net
68sbbl.they.com
62swbell.blackholes.us
51rogers.blackholes.us
51no-more-funn.moensted.dk (result 127.0.0.9 = misc)
50singapore.blackholes.us
50malaysia.blackholes.us
48inflow.blackholes.us
47blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
45spam.exsilia.net (union of all results)
42ph.rbl.cluecentral.net
42blackholes.uceb.org (union of all results)
39a2000.blackholes.us
36covad.blackholes.us
34nigeria.blackholes.us
34spam.exsilia.net (result 127.0.0.2 = spam source)
34exemptions.ahbl.org (not a blacklist!)
32rdts.dnsbl.net.au
31cybercon.blackholes.us
30blackholes.brainerd.net
29blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
28yipes.blackholes.us
27thailand.blackholes.us
23blackholes.uceb.org (result 127.0.0.2 = open relay)
23satos.rbl.cluecentral.net
22rackspace.blackholes.us
21relays.bl.kundenserver.de
18eli.blackholes.us
16broadwing.blackholes.us
15spamsources.yamta.org (result 127.0.0.2 = spam source)
15blackholes.uceb.org (result 127.0.0.3 = spam source)
14olm.blackholes.us
13spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
13no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
13blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
11pajo.blackholes.us
11blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
11spam.exsilia.net (result 127.0.0.3 = virus source)
11bl.deadbeef.com
10epoch.blackholes.us
10spam.dnsrbl.net
9maxim.blackholes.us
9blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
8burst.blackholes.us
8affinity.blackholes.us
6owps.dnsbl.net.au
5owfs.dnsbl.net.au
5spamguard.leadmon.net (result 127.0.0.3 = spam source)
5dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)
4navisite.blackholes.us
4omrs.dnsbl.net.au
4no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
3ciberlynx.blackholes.us
3dev.null.dk
3dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
2blackholes.uceb.org (result 127.0.0.4 = spam source network)
2blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
2spamsites.dnsbl.net.au
1dialup.blacklist.jippg.org (result 127.0.0.4 = dialup in Japan)
1no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
1dnsbl.ahbl.org (result 127.0.0.15 = 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
23292(total number of IP addresses whose names were tested, including 363 at SDSC)
10911(union of all domain zones)
7463abuse.rfc-ignorant.org
5909rddn.dnsbl.net.au
3362whois.rfc-ignorant.org (union of all results)
2325whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
1039whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
687bulk.rhs.mailpolice.com
469rhsbl.ahbl.org
393blackhole.securitysage.com
159bl.deadbeef.com
60porn.rhs.mailpolice.com
20dsn.rfc-ignorant.org (zone not intended for this use)
19postmaster.rfc-ignorant.org
15bogusmx.rfc-ignorant.org
2cart00ney.surriel.com

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

HitsDNS Zone
20598(total number of domains tested, including 236 at SDSC)
5755(union of all domain zones)
2356whois.rfc-ignorant.org (union of all results)
1995whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1855abuse.rfc-ignorant.org
1012bulk.rhs.mailpolice.com
854postmaster.rfc-ignorant.org
755dsn.rfc-ignorant.org
700rhsbl.ahbl.org
567blackhole.securitysage.com
361whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
191bogusmx.rfc-ignorant.org
150porn.rhs.mailpolice.com
100bl.deadbeef.com
24rddn.dnsbl.net.au (zone not intended for this use)
14rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
14rhsbl.sorbs.net (union of all results)
1rhsbl.sorbs.net (result 127.0.0.12 = domain does not send mail)
1cart00ney.surriel.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 29 February 2004.