Blacklists Compared

22 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
216315(total number of IP addresses tested, including 463 at SDSC)
209242(union of most IP zones)
190559l2.apews.org
186080zen.spamhaus.org (union of all results)
167240t1.dnsbl.net.au
119488zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
116838dnsbl-3.uceprotect.net
115591cbl.abuseat.org
114287zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
112672dnsbl-2.uceprotect.net
105195dnsbl-1.uceprotect.net
95018psbl.surriel.com
91802dnsbl.sorbs.net (union of all results)
83365hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
82032no-more-funn.moensted.dk (union of all results)
81241dnsbl.sorbs.net (result 127.0.0.10 = dialup)
75779blackholes.five-ten-sg.com (union of all results)
70098blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
64948no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
50910ubl.unsubscore.com
41169bl.spamcop.net
37316ix.dnsbl.manitu.net
36669zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
31084db.wpbl.info
16550unconfirmed.dsbl.org
16444dsbl.dnsbl.net.au
16420list.dsbl.org
16251no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
12751bl.spamcannibal.org
12138tr.countries.nerd.dk
10136dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
9993mail-abuse.blacklist.jippg.org
9990countries.blackholes.us (result 127.0.7.6 = Brazil)
9887countries.blackholes.us (result 127.1.5.6 = China)
9843countries.blackholes.us (result 127.7.9.2 = Turkey)
9405countries.blackholes.us (result 127.6.4.3 = Russia)
8486korea.services.net
7483countries.blackholes.us (result 127.4.1.0 = Korea)
7048rmst.dnsbl.net.au
6899sbl.csma.biz
6847bl.csma.biz
5002dnsbl.njabl.org (union of all results)
4600dnsbl.njabl.org (result 127.0.0.9 = open proxy)
4488blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
3990list.dnswl.org (not a blacklist!)
3822countries.blackholes.us (result 127.0.3.2 = Argentina)
2969countries.blackholes.us (result 127.7.6.4 = Thailand)
2855spamsources.fabel.dk
2838ips.backscatterer.org
2752dnsbl.ahbl.org (union of all results)
2529dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2065countries.blackholes.us (result 127.4.8.4 = Mexico)
1862hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1706aspews.ext.sorbs.net
1226hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
1141zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1122blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
908countries.blackholes.us (result 127.3.9.2 = Japan)
877countries.blackholes.us (result 127.1.5.8 = Taiwan)
818countries.blackholes.us (result 127.4.5.8 = Malaysia)
766zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
607no-more-funn.moensted.dk (result 127.0.0.9 = misc)
573dnsbl.sorbs.net (result 127.0.0.6 = spam source)
526probes.dnsbl.net.au
400countries.blackholes.us (result 127.3.4.4 = Hong Kong)
386countries.blackholes.us (result 127.7.0.2 = Singapore)
324dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
319dnsbl.njabl.org (result 127.0.0.4 = spam source)
316dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
274work.drbl.croco.net
258query.bondedsender.org (not a blacklist!)
228bl.deadbeef.com
205tor.dnsbl.sectoor.de (union of all results)
203tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
202no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
179accredit.habeas.com (not a blacklist!)
125dnsbl.ahbl.org (result 127.0.0.4 = spam source)
123iadb2.isipp.com (not a blacklist!)
118multi.surbl.org
118iadb.isipp.com (not a blacklist!)
92no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
89dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
83dnsbl.njabl.org (result 127.0.0.2 = open relay)
81multihop.dsbl.org
71hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
37blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
37dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
32blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
31dnsbl.ahbl.org (result 127.0.0.15 = open relay)
30countries.blackholes.us (result 127.5.6.6 = Nigeria)
29exemptions.ahbl.org (not a blacklist!)
26relays.nether.net
25rdts.dnsbl.net.au
24dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
17spamguard.leadmon.net (union of all results)
14multi.uribl.com (union of all results)
12multi.uribl.com (result 127.0.0.2 = spam resource)
11spam.wytnij.to
10spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
6spamguard.leadmon.net (result 127.0.0.8 = open proxy)
4blackholes.brainerd.net
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2osrs.dnsbl.net.au
2ohps.dnsbl.net.au
2blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
2dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
2dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
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)
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
216315(total number of IP addresses whose names were tested, including 463 at SDSC)
133441(union of all domain zones)
114378l1.apews.org
90179abuse.rfc-ignorant.org
83507rddn.dnsbl.net.au
46837whois.rfc-ignorant.org (union of all results)
29626whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
17211whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
742multi.surbl.org
639multi.uribl.com (union of all results)
637multi.uribl.com (result 127.0.0.2 = spam resource)
345dob.sibl.support-intelligence.net
172bl.deadbeef.com
82rhsbl.ahbl.org
76postmaster.rfc-ignorant.org
59bogusmx.rfc-ignorant.org
53dsn.rfc-ignorant.org (zone not intended for this use)
47rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
47rhsbl.sorbs.net (union of all results)
2multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
2blackhole.securitysage.com


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

HitsDNS Zone
132870(total number of domains tested, including 409 at SDSC)
32423(union of all domain zones)
18145whois.rfc-ignorant.org (union of all results)
17561whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
6958bogusmx.rfc-ignorant.org
4440abuse.rfc-ignorant.org
2041multi.surbl.org
1952multi.uribl.com (union of all results)
1886multi.uribl.com (result 127.0.0.2 = spam resource)
1749postmaster.rfc-ignorant.org
1728l1.apews.org
889dsn.rfc-ignorant.org
584whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
178rhsbl.ahbl.org
165blackhole.securitysage.com
138rddn.dnsbl.net.au (zone not intended for this use)
69rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
69rhsbl.sorbs.net (union of all results)
56multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
16ex.dnsbl.org
13dob.sibl.support-intelligence.net
10multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
3bl.deadbeef.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 28 March 2008.