Blacklists Compared

8 March 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
241388(total number of IP addresses tested, including 457 at SDSC)
231059(union of most IP zones)
207565l2.apews.org
204035zen.spamhaus.org (union of all results)
188140t1.dnsbl.net.au
143020zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
141203cbl.abuseat.org
125989zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
124285dnsbl-3.uceprotect.net
123480dnsbl-2.uceprotect.net
115191dnsbl-1.uceprotect.net
98947dnsbl.sorbs.net (union of all results)
89589no-more-funn.moensted.dk (union of all results)
87970dnsbl.sorbs.net (result 127.0.0.10 = dialup)
86315psbl.surriel.com
85280blackholes.five-ten-sg.com (union of all results)
79347blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
77356hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
73209ubl.unsubscore.com
70492no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
51113bl.spamcop.net
40661ix.dnsbl.manitu.net
36658zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
20558db.wpbl.info
18087no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
16143list.dsbl.org
15937unconfirmed.dsbl.org
15911dsbl.dnsbl.net.au
14439bl.spamcannibal.org
12721countries.blackholes.us (result 127.1.5.6 = China)
12494tr.countries.nerd.dk
11127mail-abuse.blacklist.jippg.org
10407dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
10310countries.blackholes.us (result 127.7.9.2 = Turkey)
9946countries.blackholes.us (result 127.0.7.6 = Brazil)
9310korea.services.net
9229countries.blackholes.us (result 127.6.4.3 = Russia)
8265countries.blackholes.us (result 127.4.1.0 = Korea)
7877rmst.dnsbl.net.au
5360ips.backscatterer.org
4976dnsbl.njabl.org (union of all results)
4783blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
4641dnsbl.njabl.org (result 127.0.0.9 = open proxy)
4487list.dnswl.org (not a blacklist!)
4081countries.blackholes.us (result 127.0.3.2 = Argentina)
3438spamsources.fabel.dk
3036dnsbl.ahbl.org (union of all results)
2995countries.blackholes.us (result 127.4.8.4 = Mexico)
2731dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2240countries.blackholes.us (result 127.7.6.4 = Thailand)
2001hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1891aspews.ext.sorbs.net
1623hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
1516countries.blackholes.us (result 127.3.9.2 = Japan)
1060blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1058zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1017countries.blackholes.us (result 127.4.5.8 = Malaysia)
991zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
800countries.blackholes.us (result 127.1.5.8 = Taiwan)
685dnsbl.sorbs.net (result 127.0.0.6 = spam source)
670no-more-funn.moensted.dk (result 127.0.0.9 = misc)
606probes.dnsbl.net.au
501countries.blackholes.us (result 127.3.4.4 = Hong Kong)
455bl.csma.biz
451sbl.csma.biz
377countries.blackholes.us (result 127.7.0.2 = Singapore)
292no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
290work.drbl.croco.net
287bl.deadbeef.com
276dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
260dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
250dnsbl.njabl.org (result 127.0.0.4 = spam source)
248query.bondedsender.org (not a blacklist!)
207accredit.habeas.com (not a blacklist!)
180dnsbl.ahbl.org (result 127.0.0.4 = spam source)
157tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
157tor.dnsbl.sectoor.de (union of all results)
144iadb2.isipp.com (not a blacklist!)
138iadb.isipp.com (not a blacklist!)
116multi.surbl.org
116no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
112hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
85dnsbl.njabl.org (result 127.0.0.2 = open relay)
84multihop.dsbl.org
72dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
51blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
50dnsbl.ahbl.org (result 127.0.0.15 = open relay)
46countries.blackholes.us (result 127.5.6.6 = Nigeria)
45relays.nether.net
41dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
39blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
38rdts.dnsbl.net.au
33exemptions.ahbl.org (not a blacklist!)
31multi.uribl.com (union of all results)
30multi.uribl.com (result 127.0.0.2 = spam resource)
26dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
24spamguard.leadmon.net (union of all results)
14spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
9spamguard.leadmon.net (result 127.0.0.8 = open proxy)
4blackholes.brainerd.net
4dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
2dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
1spam.wytnij.to
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1spamsites.dnsbl.net.au
1ohps.dnsbl.net.au
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1dob.sibl.support-intelligence.net
1dnsbl.ahbl.org (result 127.0.0.11 = no postmaster or abuse e-mail)
1dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)


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

HitsDNS Zone
241388(total number of IP addresses whose names were tested, including 457 at SDSC)
147661(union of all domain zones)
127812l1.apews.org
97872abuse.rfc-ignorant.org
92279rddn.dnsbl.net.au
56349whois.rfc-ignorant.org (union of all results)
38011whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
18341whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
684multi.surbl.org
541multi.uribl.com (union of all results)
540multi.uribl.com (result 127.0.0.2 = spam resource)
150bl.deadbeef.com
107postmaster.rfc-ignorant.org
103rhsbl.ahbl.org
82bogusmx.rfc-ignorant.org
72dsn.rfc-ignorant.org (zone not intended for this use)
36rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
36rhsbl.sorbs.net (union of all results)
27dob.sibl.support-intelligence.net
1multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
1blackhole.securitysage.com


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

HitsDNS Zone
156772(total number of domains tested, including 410 at SDSC)
39926(union of all domain zones)
23015whois.rfc-ignorant.org (union of all results)
22384whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
9357bogusmx.rfc-ignorant.org
4702abuse.rfc-ignorant.org
2413multi.surbl.org
2101multi.uribl.com (union of all results)
2033multi.uribl.com (result 127.0.0.2 = spam resource)
1892postmaster.rfc-ignorant.org
1652l1.apews.org
964dsn.rfc-ignorant.org
631whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
182blackhole.securitysage.com
175rhsbl.ahbl.org
80rddn.dnsbl.net.au (zone not intended for this use)
65rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
65rhsbl.sorbs.net (union of all results)
63multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
35dob.sibl.support-intelligence.net
15ex.dnsbl.org
5multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
5bl.deadbeef.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 13 March 2008.