Blacklists Compared

7 June 2008

[ 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 hostkarma.junkemailfilter.com (127.0.0.1 result), exemptions.ahbl.org, query.bondedsender.org, list.dnswl.org, accredit.habeas.com, iadb.isipp.com, and iadb2.isipp.com zones because they are not blacklists. Because it is too aggressive to be widely useful the l2.apews.org zone is also excluded from the union.

HitsDNS Zone
175008(total number of IP addresses tested, including 489 at SDSC)
165203(union of most IP zones)
143802l2.apews.org
138612zen.spamhaus.org (union of all results)
120324t1.dnsbl.net.au
88293cbl.abuseat.org
88147zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
87613zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
83660dnsbl-3.uceprotect.net
81185dnsbl-1.uceprotect.net
80285dnsbl-2.uceprotect.net
72642psbl.surriel.com
69734hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
62578dnsbl.sorbs.net (union of all results)
54966dnsbl.sorbs.net (result 127.0.0.10 = dialup)
54848no-more-funn.moensted.dk (union of all results)
51604blackholes.five-ten-sg.com (union of all results)
46738blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
42633no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
41541ubl.unsubscore.com
31539bl.spamcop.net
31023ix.dnsbl.manitu.net
27271db.wpbl.info
25473zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
11237bl.spamcannibal.org
11200no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
10112countries.blackholes.us (result 127.6.4.3 = Russia)
9923ips.backscatterer.org
9374sbl.csma.biz
9052tr.countries.nerd.dk
8476hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
8256countries.blackholes.us (result 127.1.5.6 = China)
7370mail-abuse.blacklist.jippg.org
7057dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6928countries.blackholes.us (result 127.7.9.2 = Turkey)
5684countries.blackholes.us (result 127.0.7.6 = Brazil)
5075rmst.dnsbl.net.au
4866bl.csma.biz
4786list.dnswl.org (not a blacklist!)
4658korea.services.net
3895countries.blackholes.us (result 127.4.1.0 = Korea)
3881countries.blackholes.us (result 127.0.3.2 = Argentina)
3866dnsbl.njabl.org (union of all results)
3646blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
3456dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2852spamsources.fabel.dk
2635hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2199countries.blackholes.us (result 127.7.6.4 = Thailand)
2153countries.blackholes.us (result 127.3.9.2 = Japan)
2120dnsbl.ahbl.org (union of all results)
1965dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1818countries.blackholes.us (result 127.4.8.4 = Mexico)
1175blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1138aspews.ext.sorbs.net
912zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
745no-more-funn.moensted.dk (result 127.0.0.9 = misc)
707dnsbl.sorbs.net (result 127.0.0.6 = spam source)
634countries.blackholes.us (result 127.1.5.8 = Taiwan)
634hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
422zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
394countries.blackholes.us (result 127.3.4.4 = Hong Kong)
360probes.dnsbl.net.au
337dnsbl.njabl.org (result 127.0.0.4 = spam source)
305countries.blackholes.us (result 127.7.0.2 = Singapore)
290countries.blackholes.us (result 127.4.5.8 = Malaysia)
258query.bondedsender.org (not a blacklist!)
231work.drbl.croco.net
207no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
184accredit.habeas.com (not a blacklist!)
177iadb2.isipp.com (not a blacklist!)
167iadb.isipp.com (not a blacklist!)
165tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
165tor.dnsbl.sectoor.de (union of all results)
159bl.deadbeef.com
145dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
138dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
130no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
89multi.surbl.org
73dnsbl.njabl.org (result 127.0.0.2 = open relay)
68dnsbl.ahbl.org (result 127.0.0.4 = spam source)
59exemptions.ahbl.org (not a blacklist!)
34relays.nether.net
31dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
29multi.uribl.com (union of all results)
27dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
26multi.uribl.com (result 127.0.0.2 = spam resource)
26blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
24countries.blackholes.us (result 127.5.6.6 = Nigeria)
22dnsbl.ahbl.org (result 127.0.0.15 = open relay)
21dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
19rdts.dnsbl.net.au
18blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
15spam.wytnij.to
13spamguard.leadmon.net (union of all results)
8spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
6blackholes.brainerd.net
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
4spamguard.leadmon.net (result 127.0.0.8 = open proxy)
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
3dnsbl.sorbs.net (result 127.0.0.5 = open relay)
3dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
2dnsbl.ahbl.org (result 127.0.0.11 = no postmaster or abuse e-mail)
1ohps.dnsbl.net.au
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1dob.sibl.support-intelligence.net
1dnsbl.ahbl.org (result 127.0.0.18 = virus source)
1dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)
1dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)


Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses.

HitsDNS Zone
175008(total number of IP addresses whose names were tested, including 489 at SDSC)
103129(union of all domain zones)
83021l1.apews.org
71214abuse.rfc-ignorant.org
58371rddn.dnsbl.net.au
38035whois.rfc-ignorant.org (union of all results)
36035dynamic.rhs.mailpolice.com
26482whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
11553whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
7346webmail.rhs.mailpolice.com
608adv.rhs.mailpolice.com
585multi.surbl.org
458multi.uribl.com (union of all results)
457multi.uribl.com (result 127.0.0.2 = spam resource)
278bl.deadbeef.com
122dob.sibl.support-intelligence.net
114bogusmx.rfc-ignorant.org
101postmaster.rfc-ignorant.org
92rhsbl.ahbl.org
76bulk.rhs.mailpolice.com
69dsn.rfc-ignorant.org (zone not intended for this use)
21porn.rhs.mailpolice.com
16rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
16rhsbl.sorbs.net (union of all results)
1multi.uribl.com (result 127.0.0.4 = opt-out spam resource)


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

HitsDNS Zone
130316(total number of domains tested, including 458 at SDSC)
29321(union of all domain zones)
15272whois.rfc-ignorant.org (union of all results)
14616whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
5837bogusmx.rfc-ignorant.org
4766abuse.rfc-ignorant.org
1992postmaster.rfc-ignorant.org
1828multi.surbl.org
1581l1.apews.org
1366multi.uribl.com (union of all results)
1309multi.uribl.com (result 127.0.0.2 = spam resource)
1227webmail.rhs.mailpolice.com
920dsn.rfc-ignorant.org
656whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
432porn.rhs.mailpolice.com
297adv.rhs.mailpolice.com
171bulk.rhs.mailpolice.com
161rhsbl.ahbl.org
145dob.sibl.support-intelligence.net
108rddn.dnsbl.net.au (zone not intended for this use)
95dynamic.rhs.mailpolice.com
55multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
44rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
44rhsbl.sorbs.net (union of all results)
16ex.dnsbl.org
4fraud.rhs.mailpolice.com
4bl.deadbeef.com
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 12 June 2008.