Blacklists Compared

27 August 2005

[ 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 exemptions.ahbl.org and query.bondedsender.org zones because they are not blacklists, and because it is too aggressive to be widely useful the block.blars.org zone is also excluded.

HitsDNS Zone
39920(total number of IP addresses tested, including 453 at SDSC)
32820(union of most IP zones)
27413block.blars.org
22207t1.dnsbl.net.au
17583dnsbl.sorbs.net (union of all results)
16535sbl-xbl.spamhaus.org (union of all results)
15022xbl.spamhaus.org (union of all results)
14125cbl.abuseat.org
14073sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
14063xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
10953dnsbl.sorbs.net (result 127.0.0.10 = dialup)
10533cn-kr.blackholes.us (union of all results)
8374no-more-funn.moensted.dk (union of all results)
8272blackholes.five-ten-sg.com (union of all results)
8205dynablock.njabl.org
7808blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
7427unconfirmed.dsbl.org
7334list.dsbl.org
7333dsbl.dnsbl.net.au
6861sbl.csma.biz
6735cn-kr.blackholes.us (result 127.0.0.2 = China)
6735china.blackholes.us
6703rmst.dnsbl.net.au
5724psbl.surriel.com
4986combined-hib.dnsiplists.completewhois.com (union of all results)
4977combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
4492no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
4057blacklist.spambag.org
3974dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3918korea.services.net
3798cn-kr.blackholes.us (result 127.0.0.3 = Korea)
3754bl.spamcop.net
3663dnsbl.ahbl.org (union of all results)
3421bl.csma.biz
3326dnsbl.njabl.org (union of all results)
2971l2.spews.dnsbl.sorbs.net
2869dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2530dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2439l1.spews.dnsbl.sorbs.net
2363spamsources.fabel.dk
2292spews.dnsbl.net.au
2176dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1943dnsbl.regedit64.net
1811no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
1810dnsbl.rangers.eu.org (union of all results)
1756wpbl.dnsbl.net.au
1678opm.blitzed.org
1664xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1656sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
1644sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1642sbl.spamhaus.org
1585dnsbl.rangers.eu.org (result 127.0.0.2 = dialup)
1572sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1564xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1487unsure.nether.net
1459no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1453ricn.dnsbl.net.au
1242bl.spamcannibal.org
892dnsbl.antispam.or.id
864dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
840dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
784dnsbl.ahbl.org (result 127.0.0.4 = spam source)
755spam.wytnij.to
444probes.dnsbl.net.au
444dnsbl.njabl.org (result 127.0.0.3 = dialup)
408no-more-funn.moensted.dk (result 127.0.0.9 = misc)
314tr.countries.nerd.dk
248dnsbl.njabl.org (result 127.0.0.2 = open relay)
240blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
212no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
191query.bondedsender.org (not a blacklist!)
170blackholes.intersil.net
158dnsbl.rangers.eu.org (result 127.0.0.16 = spam haven)
147dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
144blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
128mail-abuse.blacklist.jippg.org
121relays.ordb.org
111dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
108dnsbl.njabl.org (result 127.0.0.4 = spam source)
94flowgoaway.com
79multihop.dsbl.org
71ohps.dnsbl.net.au
56dnsbl.rangers.eu.org (result 127.0.0.8 = spam source)
42blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
29exemptions.ahbl.org (not a blacklist!)
28relays.nether.net
28blackholes.brainerd.net
26blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
24osps.dnsbl.net.au
22osrs.dnsbl.net.au
20rdts.dnsbl.net.au
17blackholes.uceb.org (union of all results)
10blackholes.uceb.org (result 127.0.0.2 = open relay)
10dnsbl.sorbs.net (result 127.0.0.5 = open relay)
10dnsbl.rangers.eu.org (result 127.0.0.4 = virus notices)
9combined-hib.dnsiplists.completewhois.com (result 127.0.0.2 = unallocated IP address)
9dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
7spamguard.leadmon.net (union of all results)
6spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
6blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
5blackholes.uceb.org (result 127.0.0.3 = spam source)
5hil.habeas.com
4dialup.blacklist.jippg.org (union of all results)
3omrs.dnsbl.net.au
2blackholes.uceb.org (result 127.0.0.6 = spam haven)
2dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
2dialup.blacklist.jippg.org (result 127.0.0.4 = dialup in Japan)
2blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
2blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
2blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
2dnsbl.ahbl.org (result 127.0.0.15 = open relay)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1dnsbl.rangers.eu.org (result 127.0.0.32 = worm source)
1spamsites.dnsbl.net.au
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1no-more-funn.moensted.dk (result 127.0.0.5 = relay output)

The blackholes.intersil.net zone "lists entrenched spammers, mainsleaze and mainsleaze wannabes who have pestered users at Intersil." The flowgoaway.com zone lists FloNetwork systems.


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

HitsDNS Zone
39920(total number of IP addresses whose names were tested, including 453 at SDSC)
17617(union of all domain zones)
13467abuse.rfc-ignorant.org
7631rddn.dnsbl.net.au
7515whois.rfc-ignorant.org (union of all results)
5657whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
4178dynamic.rhs.mailpolice.com
2163webmail.rhs.mailpolice.com
1862whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1013rhsbl.ahbl.org
416adv.rhs.mailpolice.com
412bl.deadbeef.com
376bulk.rhs.mailpolice.com
102postmaster.rfc-ignorant.org
28dsn.rfc-ignorant.org (zone not intended for this use)
22bogusmx.rfc-ignorant.org
6porn.rhs.mailpolice.com
1cart00ney.surriel.com


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

HitsDNS Zone
22930(total number of domains tested, including 441 at SDSC)
6620(union of all domain zones)
2393whois.rfc-ignorant.org (union of all results)
2319abuse.rfc-ignorant.org
1887whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1378postmaster.rfc-ignorant.org
1205webmail.rhs.mailpolice.com
1096rhsbl.ahbl.org
1028dsn.rfc-ignorant.org
540bogusmx.rfc-ignorant.org
506whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
388bulk.rhs.mailpolice.com
193adv.rhs.mailpolice.com
167blackhole.securitysage.com
152bl.deadbeef.com
113porn.rhs.mailpolice.com
53rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
53rhsbl.sorbs.net (union of all results)
25rddn.dnsbl.net.au (zone not intended for this use)
16ex.dnsbl.org
8dynamic.rhs.mailpolice.com
3cart00ney.surriel.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 6 September 2005.