Blacklists Compared

20 March 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
22622(total number of IP addresses tested, including 376 at SDSC)
17828(union of most IP zones)
12655t1.dnsbl.net.au
10579block.blars.org
10553blackholes.five-ten-sg.com (union of all results)
9716sbl-xbl.spamhaus.org (union of all results)
9657dnsbl.sorbs.net (union of all results)
9521blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
8386xbl.spamhaus.org (union of all results)
8377cbl.abuseat.org
8369xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
8367sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
6574dynablock.njabl.org
6414unconfirmed.dsbl.org
6372dnsbl.sorbs.net (result 127.0.0.10 = dialup)
6268dsbl.dnsbl.net.au
6268list.dsbl.org
4833no-more-funn.moensted.dk (union of all results)
4053dnsbl.njabl.org (union of all results)
3329cn-kr.blackholes.us (union of all results)
3296bl.spamcop.net
3234sbl.csma.biz
2858ipwhois.rfc-ignorant.org
2593l2.spews.dnsbl.sorbs.net
2555dnsbl.ahbl.org (union of all results)
2464dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2375psbl.surriel.com
2345no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2303spews.dnsbl.net.au
2238l1.spews.dnsbl.sorbs.net
1823pdl.blackholes.us
1750cn-kr.blackholes.us (result 127.0.0.2 = China)
1750china.blackholes.us
1725spam.wytnij.to
1705dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1688no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1605dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1579cn-kr.blackholes.us (result 127.0.0.3 = Korea)
1579korea.blackholes.us
1544rmst.dnsbl.net.au
1527sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1527sbl.spamhaus.org
1502korea.services.net
1465wpbl.dnsbl.net.au
1445dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1401unsure.nether.net
1263bl.csma.biz
1077spamsources.fabel.dk
1076dnsbl.njabl.org (result 127.0.0.3 = dialup)
933dnsbl.sorbs.net (result 127.0.0.6 = spam source)
850blacklist.spambag.org
848dnsbl.ahbl.org (result 127.0.0.4 = spam source)
833comcast.blackholes.us
797relays.visi.com
728ybl.megacity.org
728blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
600spamguard.leadmon.net (union of all results)
533spamguard.leadmon.net (result 127.0.0.2 = dialup)
527brazil.blackholes.us
517xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
517sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
517opm.blitzed.org
493cw.blackholes.us
490ricn.dnsbl.net.au
477work.drbl.croco.net
460probes.dnsbl.net.au
424taiwan.blackholes.us
414dnsbl.njabl.org (result 127.0.0.4 = spam source)
409no-more-funn.moensted.dk (result 127.0.0.9 = misc)
395rr.blackholes.us
392pss.spambusters.org.ar
381level3.blackholes.us
347rbl.rangers.eu.org (union of all results)
327blackholes.intersil.net
251charter.blackholes.us
234dnsbl.antispam.or.id
231blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
227japan.blackholes.us
223no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
215hil.habeas.com
207no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
188dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
185wanadoo-fr.blackholes.us
164dialup.blacklist.jippg.org (union of all results)
163dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
154tr.countries.nerd.dk
153turkey.blackholes.us
149russia.blackholes.us
144mexico.blackholes.us
143rbl.rangers.eu.org (result 127.0.0.4 = dialup)
140qwest.blackholes.us
1403y.spam.mrs.kithrup.com
133multihop.dsbl.org
127hongkong.blackholes.us
125verio.blackholes.us
124dnsbl.njabl.org (result 127.0.0.2 = source or relay)
121internap.blackholes.us
121argentina.blackholes.us
119osps.dnsbl.net.au
113relays.ordb.org
109interbusiness.blackholes.us
109mail-abuse.blacklist.jippg.org
97infolink.blackholes.us
97ohps.dnsbl.net.au
94dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
89rbl.rangers.eu.org (result 127.0.0.3 = spam haven)
80query.bondedsender.org (not a blacklist!)
78xo.blackholes.us
74flowgoaway.com
73osrs.dnsbl.net.au
73ph.rbl.cluecentral.net
72xbl.spamhaus.org (result 127.0.0.5 = Relay Stop List)
72sbl-xbl.spamhaus.org (result 127.0.0.5 = Relay Stop List)
68relays.nether.net
67spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
67dun.dnsrbl.net
65malaysia.blackholes.us
62telstra.blackholes.us
62rogers.blackholes.us
59bellsouth.blackholes.us
58singapore.blackholes.us
56sbbl.they.com
54he.blackholes.us
48rbl.rangers.eu.org (result 127.0.0.2 = spam source)
47dnsbl.sorbs.net (result 127.0.0.5 = open relay)
42a2000.blackholes.us
41inflow.blackholes.us
41rdts.dnsbl.net.au
38rbl.rangers.eu.org (result 127.0.0.1 = misc)
37dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
36above.blackholes.us
35cybercon.blackholes.us
33thailand.blackholes.us
31blackholes.brainerd.net
30blackholes.uceb.org (union of all results)
29blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
28rackspace.blackholes.us
28covad.blackholes.us
25nigeria.blackholes.us
25rbl.rangers.eu.org (result 127.0.0.10 = virus notices)
25blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
21broadwing.blackholes.us
19swbell.blackholes.us
19satos.rbl.cluecentral.net
19exemptions.ahbl.org (not a blacklist!)
17yipes.blackholes.us
15spamsources.yamta.org (result 127.0.0.2 = spam source)
15blackholes.uceb.org (result 127.0.0.3 = spam source)
14blackholes.uceb.org (result 127.0.0.2 = open relay)
12blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
9olm.blackholes.us
8eli.blackholes.us
8no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
8bl.deadbeef.com
7maxim.blackholes.us
7owps.dnsbl.net.au
6pajo.blackholes.us
6affinity.blackholes.us
5epoch.blackholes.us
5burst.blackholes.us
5omrs.dnsbl.net.au
5blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
4no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
3navisite.blackholes.us
3rbl.rangers.eu.org (result 127.0.0.5 = relay output)
3relays.bl.kundenserver.de
1blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
1rbl.rangers.eu.org (result 127.0.0.8 = source or relay)
1dev.null.dk
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 127.0.0.8 = open web form)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
1spam.exsilia.net (result 127.0.0.4 = open proxy)
1dnsbl.ahbl.org (result 127.0.0.15 = open relay)
1dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)
1spam.exsilia.net (union of all results)

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
22622(total number of IP addresses whose names were tested, including 376 at SDSC)
10517(union of all domain zones)
7227abuse.rfc-ignorant.org
6009rddn.dnsbl.net.au
2859whois.rfc-ignorant.org (union of all results)
1878whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
981whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
632bulk.rhs.mailpolice.com
401rhsbl.ahbl.org
397blackhole.securitysage.com
294bl.deadbeef.com
38porn.rhs.mailpolice.com
17postmaster.rfc-ignorant.org
15dsn.rfc-ignorant.org (zone not intended for this use)
6bogusmx.rfc-ignorant.org

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

HitsDNS Zone
17886(total number of domains tested, including 239 at SDSC)
5681(union of all domain zones)
2304whois.rfc-ignorant.org (union of all results)
2001whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1590abuse.rfc-ignorant.org
1340bulk.rhs.mailpolice.com
915rhsbl.ahbl.org
761blackhole.securitysage.com
732postmaster.rfc-ignorant.org
663dsn.rfc-ignorant.org
303whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
178bogusmx.rfc-ignorant.org
100bl.deadbeef.com
73porn.rhs.mailpolice.com
45ex.dnsbl.org (union of all results)
42ex.dnsbl.org (result 127.0.0.2 = spamsites)
22rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
22rhsbl.sorbs.net (union of all results)
16rddn.dnsbl.net.au (zone not intended for this use)
3ex.dnsbl.org (result 127.0.0.3 = spam source)
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 4 April 2004.