Blacklists Compared

15 February 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
9928(total number of IP addresses tested, including 403 at SDSC)
6400(union of most IP zones)
4736xbl.selwerd.cx
3608blackholes.five-ten-sg.com (union of all results)
2709t1.bl.reynolds.net.au
2171blackholes.wirehub.net
2044no-more-funn.moensted.dk (union of all results)
1979relays.osirusoft.com (union of all results)
1865block.blars.org
1489unconfirmed.dsbl.org
1215list.dsbl.org
1188ztl.dorkslayers.com
1166blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
1149bl.spamcop.net
1144blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
1037no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1027dnsbl.njabl.org (union of all results)
1016cn-kr.blackholes.us (union of all results)
949proxies.relays.monkeys.com (union of all results)
946proxies.relays.monkeys.com (result 127.0.0.2 = open proxy)
900dnsbl.sorbs.net (union of all results)
870blackholes.intersil.net
866blackholes.five-ten-sg.com (result 127.0.0.3 = dialup)
829relays.osirusoft.com (result 127.0.0.4 = spam source)
813sbl.spamhaus.org
812spews.bl.reynolds.net.au
800spews.relays.osirusoft.com
757ipwhois.rfc-ignorant.org
752spamhaus.relays.osirusoft.com
724relays.osirusoft.com (result 127.0.0.6 = spamsites)
717assholes.madscience.nl
706dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
632cw.blackholes.us
621blocktest.relays.osirusoft.com (not a blacklist!)
618korea.blackholes.us
617cn-kr.blackholes.us (result 127.0.0.3 = Korea)
614korea.services.net
573spam.dnsrbl.net
563ybl.megacity.org
550opm.blitzed.org
544dnsbl.njabl.org (result 127.0.0.4 = spam source)
497no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
449dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
418blackholes.uceb.org (union of all results)
416work.drbl.croco.net
399cn-kr.blackholes.us (result 127.0.0.2 = China)
399china.blackholes.us
385relays.osirusoft.com (result 127.0.0.9 = open proxy)
379socks.relays.osirusoft.com
373spamsources.fabel.dk
372dnsbl.njabl.org (result 127.0.0.2 = source or relay)
343blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
314dnsbl.delink.net
301relays.osirusoft.com (result 127.0.0.2 = relay)
300inputs.relays.osirusoft.com
300no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
296spam.wytnij.to
273blacklist.spambag.org
257blackholes.uceb.org (result 127.0.0.4 = spam organization)
244rackspace.blackholes.us
244mail-abuse.blacklist.jippg.org
229flowgoaway.com
217multihop.dsbl.org
193relays.bl.kundenserver.de
1743y.spam.mrs.kithrup.com
168brazil.blackholes.us
155spamsources.relays.osirusoft.com (union of all results)
150verio.blackholes.us
144spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
144spamguard.leadmon.net (union of all results)
135relays.ordb.org
131spamguard.leadmon.net (result 127.0.0.2 = dialup)
122rr.blackholes.us
109dynablock.wirehub.net (result 127.0.0.2 = dialup)
109dynablock.wirehub.net (union of all results)
106taiwan.blackholes.us
106no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
106dun.dnsrbl.net
105vox.schpider.com
99blackholes.uceb.org (result 127.0.0.3 = spam source)
94dnsbl.njabl.org (result 127.0.0.3 = dialup)
91internap.blackholes.us
83level3.blackholes.us
81blackhole.compu.net
78dialups.relays.osirusoft.com (union of all results)
77blackholes.uceb.org (result 127.0.0.2 = relay)
76dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
71xo.blackholes.us
71orbs.dorkslayers.com
68dialups.visi.com
64relays.osirusoft.com (result 127.0.0.3 = dialup)
58blackholes.brainerd.net
56no-more-funn.moensted.dk (result 127.0.0.9 = misc)
53blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
51argentina.blackholes.us
50cybercon.blackholes.us
49spam.exsilia.net (result 127.0.0.2 = spam source)
49spam.exsilia.net (union of all results)
46japan.blackholes.us
45hongkong.blackholes.us
43interbusiness.blackholes.us
38russia.blackholes.us
38inflow.blackholes.us
38inflow.noflow.org
33singapore.blackholes.us
33dnsbl.sorbs.net (result 127.0.0.6 = spam source)
32above.blackholes.us
32dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
25tr.countries.nerd.dk
25no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
21eli.blackholes.us
19nigeria.blackholes.us
19dev.null.dk
17he.blackholes.us
16covad.blackholes.us
16blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
15relays.dorkslayers.com
14spammers.v6net.org
14thailand.blackholes.us
14dnsbl.njabl.org (result 127.0.0.9 = open proxy)
14no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
13broadwing.blackholes.us
11valuenet.blackholes.us
11malaysia.blackholes.us
11spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
10yipes.blackholes.us
10pajo.blackholes.us
10blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
10blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
10ph.rbl.cluecentral.net
9dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
9dialup.blacklist.jippg.org (union of all results)
8wanadoo-fr.blackholes.us
8epoch.blackholes.us
8ciberlynx.blackholes.us
8spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
7no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
6affinity.blackholes.us
4valueweb.blackholes.us
4proxies.relays.osirusoft.com
3spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
3relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
3dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
3proxies.relays.monkeys.com (result 127.0.0.3 = proxy output)
3proxies.exsilia.net
2spamsites.relays.osirusoft.com (result 127.0.0.6)
2dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2no-more-funn.moensted.dk (result 127.0.0.11 = repeated probes)
2spamsites.relays.osirusoft.com (union of all results)

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
9928(total number of IP addresses whose names were tested, including 403 at SDSC)
2302(union of all domain zones)
1520abuse.rfc-ignorant.org
1483whois.rfc-ignorant.org (union of all results)
1240whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
243whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
15postmaster.rfc-ignorant.org
15dsn.rfc-ignorant.org (zone not intended for this use)

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

HitsDNS Zone
6757(total number of domains tested, including 194 at SDSC)
1022(union of all domain zones)
498abuse.rfc-ignorant.org
400whois.rfc-ignorant.org (union of all results)
293whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
233postmaster.rfc-ignorant.org
173dsn.rfc-ignorant.org
107whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
32ex.dnsbl.org (union of all results)
26ex.dnsbl.org (result 127.0.0.2 = spamsites)
7bandwidth-pigs.monkeys.com
6ex.dnsbl.org (result 127.0.0.3 = spam source)
6in.dnsbl.org (union of all results)
5in.dnsbl.org (result 127.0.0.6 = unconfirmed opt-in)
1in.dnsbl.org (result 127.0.0.2 = spam source)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 18 February 2003.