Blacklists Compared

19 April 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
203629(total number of IP addresses tested, including 455 at SDSC)
195522(union of most IP zones)
174748l2.apews.org
164191zen.spamhaus.org (union of all results)
145966t1.dnsbl.net.au
111762dnsbl-3.uceprotect.net
105257zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
100554dnsbl-2.uceprotect.net
98465cbl.abuseat.org
98379zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
94600psbl.surriel.com
93526dnsbl-1.uceprotect.net
83495dnsbl.sorbs.net (union of all results)
80247hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
77277no-more-funn.moensted.dk (union of all results)
74048blackholes.five-ten-sg.com (union of all results)
70715dnsbl.sorbs.net (result 127.0.0.10 = dialup)
68661blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
53033no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
39222bl.spamcop.net
35210ix.dnsbl.manitu.net
30413zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
30098db.wpbl.info
22342no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
20909countries.blackholes.us (result 127.1.5.6 = China)
14286unconfirmed.dsbl.org
14182list.dsbl.org
14176dsbl.dnsbl.net.au
13004dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
11670bl.spamcannibal.org
11430tr.countries.nerd.dk
10462mail-abuse.blacklist.jippg.org
9247hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
9151countries.blackholes.us (result 127.7.9.2 = Turkey)
8490countries.blackholes.us (result 127.0.7.6 = Brazil)
8338countries.blackholes.us (result 127.6.4.3 = Russia)
7290ips.backscatterer.org
5099korea.services.net
4595list.dnswl.org (not a blacklist!)
4473countries.blackholes.us (result 127.4.1.0 = Korea)
4378dnsbl.njabl.org (union of all results)
4181blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
4153spamsources.fabel.dk
3989dnsbl.njabl.org (result 127.0.0.9 = open proxy)
3837ubl.unsubscore.com
3775rmst.dnsbl.net.au
3222countries.blackholes.us (result 127.0.3.2 = Argentina)
2848dnsbl.ahbl.org (union of all results)
2569dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2215hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1775countries.blackholes.us (result 127.4.8.4 = Mexico)
1590countries.blackholes.us (result 127.3.9.2 = Japan)
1576countries.blackholes.us (result 127.7.6.4 = Thailand)
1485no-more-funn.moensted.dk (result 127.0.0.9 = misc)
1399aspews.ext.sorbs.net
1312hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
1143blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
844zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
712countries.blackholes.us (result 127.1.5.8 = Taiwan)
689zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
634countries.blackholes.us (result 127.4.5.8 = Malaysia)
412probes.dnsbl.net.au
390countries.blackholes.us (result 127.3.4.4 = Hong Kong)
339dnsbl.sorbs.net (result 127.0.0.6 = spam source)
332countries.blackholes.us (result 127.7.0.2 = Singapore)
324dnsbl.njabl.org (result 127.0.0.4 = spam source)
285query.bondedsender.org (not a blacklist!)
283no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
234sbl.csma.biz
233bl.csma.biz
227work.drbl.croco.net
220dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
218dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
215accredit.habeas.com (not a blacklist!)
211no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
192tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
192tor.dnsbl.sectoor.de (union of all results)
177bl.deadbeef.com
172iadb2.isipp.com (not a blacklist!)
158iadb.isipp.com (not a blacklist!)
142dnsbl.ahbl.org (result 127.0.0.4 = spam source)
95dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
93multi.surbl.org
80multihop.dsbl.org
71dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
65dnsbl.njabl.org (result 127.0.0.2 = open relay)
54relays.nether.net
38exemptions.ahbl.org (not a blacklist!)
34blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
26countries.blackholes.us (result 127.5.6.6 = Nigeria)
26rdts.dnsbl.net.au
25blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
24dnsbl.ahbl.org (result 127.0.0.15 = open relay)
15dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
13spam.wytnij.to
13spamguard.leadmon.net (union of all results)
10ohps.dnsbl.net.au
9spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
7blackholes.brainerd.net
6multi.uribl.com (result 127.0.0.2 = spam resource)
6multi.uribl.com (union of all results)
4blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
3spamguard.leadmon.net (result 127.0.0.8 = open proxy)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)
1spamsites.dnsbl.net.au
1ricn.dnsbl.net.au
1osrs.dnsbl.net.au
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
1dob.sibl.support-intelligence.net
1dnsbl.ahbl.org (result 127.0.0.11 = no postmaster or abuse e-mail)


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

HitsDNS Zone
203629(total number of IP addresses whose names were tested, including 455 at SDSC)
119264(union of all domain zones)
102187l1.apews.org
82352abuse.rfc-ignorant.org
73948rddn.dnsbl.net.au
47349dynamic.rhs.mailpolice.com
45147whois.rfc-ignorant.org (union of all results)
30052whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
15095whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
7831webmail.rhs.mailpolice.com
633multi.surbl.org
620adv.rhs.mailpolice.com
498multi.uribl.com (result 127.0.0.2 = spam resource)
498multi.uribl.com (union of all results)
238bulk.rhs.mailpolice.com
154bl.deadbeef.com
94bogusmx.rfc-ignorant.org
81postmaster.rfc-ignorant.org
80rhsbl.ahbl.org
59dsn.rfc-ignorant.org (zone not intended for this use)
28rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
28rhsbl.sorbs.net (union of all results)
27dob.sibl.support-intelligence.net
15porn.rhs.mailpolice.com
2blackhole.securitysage.com


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

HitsDNS Zone
150945(total number of domains tested, including 415 at SDSC)
36660(union of all domain zones)
21075whois.rfc-ignorant.org (union of all results)
20407whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
7098bogusmx.rfc-ignorant.org
4838abuse.rfc-ignorant.org
2040postmaster.rfc-ignorant.org
1958multi.surbl.org
1735l1.apews.org
1666multi.uribl.com (union of all results)
1602multi.uribl.com (result 127.0.0.2 = spam resource)
1174webmail.rhs.mailpolice.com
965dsn.rfc-ignorant.org
668whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
524porn.rhs.mailpolice.com
244adv.rhs.mailpolice.com
212bulk.rhs.mailpolice.com
181rhsbl.ahbl.org
173blackhole.securitysage.com
144rddn.dnsbl.net.au (zone not intended for this use)
132dynamic.rhs.mailpolice.com
62multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
62rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
62rhsbl.sorbs.net (union of all results)
28dob.sibl.support-intelligence.net
14ex.dnsbl.org
5fraud.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 25 April 2008.