Blacklists Compared

15 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
237679(total number of IP addresses tested, including 468 at SDSC)
229285(union of most IP zones)
207830l2.apews.org
203422zen.spamhaus.org (union of all results)
186731t1.dnsbl.net.au
140277cbl.abuseat.org
140223zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
125490zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
118691dnsbl-3.uceprotect.net
117232dnsbl-2.uceprotect.net
106670dnsbl-1.uceprotect.net
100486dnsbl.sorbs.net (union of all results)
94720psbl.surriel.com
89857dnsbl.sorbs.net (result 127.0.0.10 = dialup)
88158no-more-funn.moensted.dk (union of all results)
82981hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
81753blackholes.five-ten-sg.com (union of all results)
76057blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
71040no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
63647ubl.unsubscore.com
50715bl.spamcop.net
40152ix.dnsbl.manitu.net
37882zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
31815db.wpbl.info
16209unconfirmed.dsbl.org
16159no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
16125list.dsbl.org
16121dsbl.dnsbl.net.au
14034bl.spamcannibal.org
12344tr.countries.nerd.dk
11671mail-abuse.blacklist.jippg.org
10621countries.blackholes.us (result 127.1.5.6 = China)
10282dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
10163countries.blackholes.us (result 127.7.9.2 = Turkey)
9893countries.blackholes.us (result 127.0.7.6 = Brazil)
8557countries.blackholes.us (result 127.6.4.3 = Russia)
8090korea.services.net
7842rmst.dnsbl.net.au
6983countries.blackholes.us (result 127.4.1.0 = Korea)
4794dnsbl.njabl.org (union of all results)
4522blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
4466dnsbl.njabl.org (result 127.0.0.9 = open proxy)
4186list.dnswl.org (not a blacklist!)
4169countries.blackholes.us (result 127.0.3.2 = Argentina)
4143ips.backscatterer.org
3456spamsources.fabel.dk
3120countries.blackholes.us (result 127.4.8.4 = Mexico)
2929dnsbl.ahbl.org (union of all results)
2678dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2563countries.blackholes.us (result 127.7.6.4 = Thailand)
2015hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1729aspews.ext.sorbs.net
1329countries.blackholes.us (result 127.3.9.2 = Japan)
1079blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1047countries.blackholes.us (result 127.4.5.8 = Malaysia)
886hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
860zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
839zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
783countries.blackholes.us (result 127.1.5.8 = Taiwan)
623no-more-funn.moensted.dk (result 127.0.0.9 = misc)
609probes.dnsbl.net.au
560countries.blackholes.us (result 127.3.4.4 = Hong Kong)
436countries.blackholes.us (result 127.7.0.2 = Singapore)
323tor.dnsbl.sectoor.de (union of all results)
320tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
320dnsbl.sorbs.net (result 127.0.0.6 = spam source)
271bl.deadbeef.com
264dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
263no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
258work.drbl.croco.net
254dnsbl.njabl.org (result 127.0.0.4 = spam source)
248query.bondedsender.org (not a blacklist!)
247dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
202bl.csma.biz
173accredit.habeas.com (not a blacklist!)
160iadb2.isipp.com (not a blacklist!)
159sbl.csma.biz
152hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
152iadb.isipp.com (not a blacklist!)
137multi.surbl.org
131dnsbl.ahbl.org (result 127.0.0.4 = spam source)
123no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
80multihop.dsbl.org
74dnsbl.njabl.org (result 127.0.0.2 = open relay)
57dnsbl.ahbl.org (result 127.0.0.15 = open relay)
50blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
44blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
42countries.blackholes.us (result 127.5.6.6 = Nigeria)
42relays.nether.net
41dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
41exemptions.ahbl.org (not a blacklist!)
33rdts.dnsbl.net.au
32dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
26dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
21spamguard.leadmon.net (union of all results)
16multi.uribl.com (result 127.0.0.2 = spam resource)
16multi.uribl.com (union of all results)
15spam.wytnij.to
12spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
8spamguard.leadmon.net (result 127.0.0.8 = open proxy)
8blackholes.brainerd.net
4ohps.dnsbl.net.au
3tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2osrs.dnsbl.net.au
2dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
1osps.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)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
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)
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
237679(total number of IP addresses whose names were tested, including 468 at SDSC)
148540(union of all domain zones)
127394l1.apews.org
101500abuse.rfc-ignorant.org
91400rddn.dnsbl.net.au
53692whois.rfc-ignorant.org (union of all results)
35252whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
18440whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
716multi.surbl.org
609multi.uribl.com (union of all results)
605multi.uribl.com (result 127.0.0.2 = spam resource)
170bl.deadbeef.com
84postmaster.rfc-ignorant.org
84rhsbl.ahbl.org
68bogusmx.rfc-ignorant.org
66dsn.rfc-ignorant.org (zone not intended for this use)
49dob.sibl.support-intelligence.net
37rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
37rhsbl.sorbs.net (union of all results)
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2blackhole.securitysage.com
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
139218(total number of domains tested, including 422 at SDSC)
32574(union of all domain zones)
17532whois.rfc-ignorant.org (union of all results)
16920whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
7731bogusmx.rfc-ignorant.org
4387abuse.rfc-ignorant.org
2081multi.surbl.org
1813postmaster.rfc-ignorant.org
1789multi.uribl.com (union of all results)
1716multi.uribl.com (result 127.0.0.2 = spam resource)
1652l1.apews.org
923dsn.rfc-ignorant.org
612whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
185blackhole.securitysage.com
180rhsbl.ahbl.org
72rddn.dnsbl.net.au (zone not intended for this use)
69multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
65rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
65rhsbl.sorbs.net (union of all results)
16ex.dnsbl.org
7dob.sibl.support-intelligence.net
4multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
4bl.deadbeef.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 20 March 2008.