Blacklists Compared

4 January 2003

[ 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 xbl.selwerd.cx zone because it is too aggressive to be widely useful, and excludes the blocktest.relays.osirusoft.com zone because it is not a blacklist.

HitsDNS Zone
7300(total number of IP addresses tested, including 326 at SDSC)
4925(union of most IP zones)
3491xbl.selwerd.cx
2824blackholes.five-ten-sg.com (union of all results)
1848blackholes.wirehub.net
1702relays.osirusoft.com (union of all results)
1482no-more-funn.moensted.dk (union of all results)
1401bl.spamcop.net
1242block.blars.org
1141assholes.madscience.nl
1083unconfirmed.dsbl.org
995blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
912list.dsbl.org
882ztl.dorkslayers.com
878blackholes.intersil.net
849blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
833relays.osirusoft.com (result 127.0.0.4 = spam source)
833cn-kr.blackholes.us (union of all results)
799no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
733dnsbl.njabl.org (union of all results)
716sbl.spamhaus.org
708dnsbl.sorbs.net (union of all results)
691spamhaus.relays.osirusoft.com
667relays.osirusoft.com (result 127.0.0.6 = spamsites)
658ipwhois.rfc-ignorant.org
653spews.relays.osirusoft.com
626blackholes.five-ten-sg.com (result 127.0.0.3 = dialup)
563dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
560t1.bl.reynolds.net.au
543cn-kr.blackholes.us (result 127.0.0.3 = Korea)
543korea.blackholes.us
541korea.services.net
514spam.dnsrbl.net
492cw.blackholes.us
438work.drbl.croco.net
425spamsources.fabel.dk
407opm.blitzed.org
392blackholes.uceb.org (union of all results)
388dnsbl.njabl.org (result 127.0.0.4 = spam source)
365socks.relays.osirusoft.com
365relays.osirusoft.com (result 127.0.0.9 = open proxy)
334http.opm.blitzed.org
326blocktest.relays.osirusoft.com (not a blacklist!)
322ybl.megacity.org
305dnsbl.njabl.org (result 127.0.0.2 = source or relay)
299spamsources.relays.osirusoft.com (union of all results)
290cn-kr.blackholes.us (result 127.0.0.2 = China)
290china.blackholes.us
287spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
285blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
247spam.wytnij.to
244relays.osirusoft.com (result 127.0.0.2 = relay)
243inputs.relays.osirusoft.com
239no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
231dnsbl.delink.net
222no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
216dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
207blackholes.uceb.org (result 127.0.0.4 = spam organization)
205flowgoaway.com
196blacklist.spambag.org
177mail-abuse.blacklist.jippg.org
175relays.bl.kundenserver.de
1663y.spam.mrs.kithrup.com
165no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
154multihop.dsbl.org
143blackholes.uceb.org (result 127.0.0.3 = spam source)
141verio.blackholes.us
138relays.ordb.org
124rackspace.blackholes.us
107brazil.blackholes.us
95socks.opm.blitzed.org
91taiwan.blackholes.us
91internap.blackholes.us
91spamguard.leadmon.net (union of all results)
88blackhole.compu.net
81spamguard.leadmon.net (result 127.0.0.2 = dialup)
76dun.dnsrbl.net
74vox.schpider.com
64rr.blackholes.us
60xo.blackholes.us
57orbs.dorkslayers.com
56level3.blackholes.us
52blackholes.uceb.org (result 127.0.0.2 = relay)
52blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
50tr.countries.nerd.dk
49dynablock.wirehub.net (result 127.0.0.2 = dialup)
49dynablock.wirehub.net (union of all results)
40argentina.blackholes.us
37interbusiness.blackholes.us
36formmail.relays.monkeys.com
35dialups.relays.osirusoft.com (union of all results)
34dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
34no-more-funn.moensted.dk (result 127.0.0.9 = misc)
31dnsbl.njabl.org (result 127.0.0.3 = dialup)
29japan.blackholes.us
29relays.osirusoft.com (result 127.0.0.3 = dialup)
28inflow.blackholes.us
28inflow.noflow.org
26russia.blackholes.us
25spam.exsilia.net (result 127.0.0.2 = spam source)
25spam.exsilia.net (union of all results)
24cybercon.blackholes.us
24dnsbl.sorbs.net (result 127.0.0.6 = spam source)
23singapore.blackholes.us
23hongkong.blackholes.us
19dev.null.dk
16spammers.v6net.org
16yipes.blackholes.us
16dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
15above.blackholes.us
15ph.rbl.cluecentral.net
13relays.dorkslayers.com
12broadwing.blackholes.us
12blackholes.brainerd.net
11he.blackholes.us
11epoch.blackholes.us
11ciberlynx.blackholes.us
11no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
11no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
10valuenet.blackholes.us
10pajo.blackholes.us
9malaysia.blackholes.us
9spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
9blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
8thailand.blackholes.us
8spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
8blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
7wanadoo-fr.blackholes.us
7nigeria.blackholes.us
7eli.blackholes.us
7dnsbl.njabl.org (result 127.0.0.9 = open proxy)
6covad.blackholes.us
6affinity.blackholes.us
5spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
5relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
4wingate.opm.blitzed.org
4dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
4dialup.blacklist.jippg.org (union of all results)
3valueweb.blackholes.us
2spamsites.relays.osirusoft.com (result 127.0.0.6)
2dnsbl.njabl.org (result 127.0.0.5 = relay output)
2spamsites.relays.osirusoft.com (union of all results)
1skynetweb.blackholes.us
1blackholes.uceb.org (result 127.0.0.5 = dialup)
1proxies.relays.osirusoft.com
1dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)

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. The blackhole.compu.net zone "is primarily for hosts which were not blocked by other blackhole sites and spammed compu.net."

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

HitsDNS Zone
7300(total number of IP addresses whose names were tested, including 326 at SDSC)
1234(union of all domain zones)
1055abuse.rfc-ignorant.org
291whois.rfc-ignorant.org (union of all results)
148whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
143whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
11dsn.rfc-ignorant.org (zone not intended for this use)
8postmaster.rfc-ignorant.org

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

HitsDNS Zone
4613(total number of domains tested, including 149 at SDSC)
801(union of all domain zones)
431abuse.rfc-ignorant.org
234whois.rfc-ignorant.org (union of all results)
231postmaster.rfc-ignorant.org
174dsn.rfc-ignorant.org
155whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
79whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
28ex.dnsbl.org (union of all results)
23ex.dnsbl.org (result 127.0.0.2 = spamsites)
6bandwidth-pigs.monkeys.com
5ex.dnsbl.org (result 127.0.0.3 = spam source)
2in.dnsbl.org (union of all results)
1in.dnsbl.org (result 127.0.0.2 = spam source)
1in.dnsbl.org (result 127.0.0.6 = unconfirmed opt-in)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 6 January 2003.