Blacklists Compared

8 March 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
10883(total number of IP addresses tested, including 433 at SDSC)
7172(union of most IP zones)
5376xbl.selwerd.cx
4001blackholes.five-ten-sg.com (union of all results)
3193t1.bl.reynolds.net.au
2474blackholes.wirehub.net
2300relays.osirusoft.com (union of all results)
2226no-more-funn.moensted.dk (union of all results)
2171block.blars.org
1866dnsbl.njabl.org (union of all results)
1794unconfirmed.dsbl.org
1475list.dsbl.org
1304bl.spamcop.net
1248blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
1230dnsbl.sorbs.net (union of all results)
1186blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
1175ztl.dorkslayers.com
1164no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1147proxies.relays.monkeys.com (result 127.0.0.2 = open proxy)
1147proxies.relays.monkeys.com (union of all results)
1121cn-kr.blackholes.us (union of all results)
1106blackholes.five-ten-sg.com (result 127.0.0.3 = dialup)
1096proxies.blackholes.wirehub.net
1023blackholes.intersil.net
906spamhaus.relays.osirusoft.com
887relays.osirusoft.com (result 127.0.0.6 = spamsites)
866opm.blitzed.org
863dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
850ipwhois.rfc-ignorant.org
806dnsbl.njabl.org (result 127.0.0.9 = open proxy)
756relays.osirusoft.com (result 127.0.0.4 = spam source)
741spews.bl.reynolds.net.au
722spews.relays.osirusoft.com
716spam.dnsrbl.net
685dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
633sbl.spamhaus.org
604blocktest.relays.osirusoft.com (not a blacklist!)
579cw.blackholes.us
568cn-kr.blackholes.us (result 127.0.0.2 = China)
568china.blackholes.us
553cn-kr.blackholes.us (result 127.0.0.3 = Korea)
553korea.blackholes.us
550korea.services.net
543dnsbl.njabl.org (result 127.0.0.4 = spam source)
510no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
507work.drbl.croco.net
506spamsources.fabel.dk
503relays.osirusoft.com (result 127.0.0.9 = open proxy)
491socks.relays.osirusoft.com
462assholes.madscience.nl
419blackholes.uceb.org (union of all results)
404relays.osirusoft.com (result 127.0.0.2 = relay)
404inputs.relays.osirusoft.com
393dnsbl.njabl.org (result 127.0.0.2 = source or relay)
350rackspace.blackholes.us
348blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
312no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
310spam.wytnij.to
289blacklist.spambag.org
287ybl.megacity.org
279dnsbl.delink.net
260multihop.dsbl.org
237flowgoaway.com
223blackholes.uceb.org (result 127.0.0.4 = spam organization)
217mail-abuse.blacklist.jippg.org
216relays.bl.kundenserver.de
187verio.blackholes.us
1553y.spam.mrs.kithrup.com
152spamsources.relays.osirusoft.com (union of all results)
150dynablock.wirehub.net (result 127.0.0.2 = dialup)
150dynablock.wirehub.net (union of all results)
149spamguard.leadmon.net (union of all results)
146brazil.blackholes.us
140taiwan.blackholes.us
140relays.ordb.org
137spamguard.leadmon.net (result 127.0.0.2 = dialup)
136spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
131orbs.dorkslayers.com
128dun.dnsrbl.net
124blackholes.uceb.org (result 127.0.0.3 = spam source)
112internap.blackholes.us
111dnsbl.njabl.org (result 127.0.0.3 = dialup)
103rr.blackholes.us
102vox.schpider.com
99level3.blackholes.us
96xo.blackholes.us
92no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
91japan.blackholes.us
91dialups.relays.osirusoft.com (union of all results)
86dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
82blackholes.uceb.org (result 127.0.0.2 = relay)
79dialups.visi.com
78no-more-funn.moensted.dk (result 127.0.0.9 = misc)
76blackhole.compu.net
74blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
72blackholes.brainerd.net
69relays.osirusoft.com (result 127.0.0.3 = dialup)
65argentina.blackholes.us
61russia.blackholes.us
57hongkong.blackholes.us
56dnsbl.sorbs.net (result 127.0.0.6 = spam source)
53spam.exsilia.net (result 127.0.0.2 = spam source)
53spam.exsilia.net (union of all results)
45inflow.blackholes.us
45inflow.noflow.org
43interbusiness.blackholes.us
41tr.countries.nerd.dk
39singapore.blackholes.us
36no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
28eli.blackholes.us
25above.blackholes.us
25no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
23cybercon.blackholes.us
22relays.dorkslayers.com
21he.blackholes.us
21dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
20blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
19nigeria.blackholes.us
16thailand.blackholes.us
16covad.blackholes.us
16proxies.relays.osirusoft.com
14broadwing.blackholes.us
14spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
13valuenet.blackholes.us
13dev.null.dk
12dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
12dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
12blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
12dialup.blacklist.jippg.org (union of all results)
11wanadoo-fr.blackholes.us
10epoch.blackholes.us
10spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
9yipes.blackholes.us
9affinity.blackholes.us
9ph.rbl.cluecentral.net
8spammers.v6net.org
8malaysia.blackholes.us
8ciberlynx.blackholes.us
7pajo.blackholes.us
7relays.osirusoft.com (result 127.0.0.5 = relay output)
7no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
7blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
5valueweb.blackholes.us
5dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
3skynetweb.blackholes.us
2blackholes.uceb.org (result 127.0.0.5 = dialup)
2spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
2spamsites.relays.osirusoft.com (result 127.0.0.6)
2relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2no-more-funn.moensted.dk (result 127.0.0.11 = repeated probes)
2proxies.exsilia.net
2spamsites.relays.osirusoft.com (union of all results)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1dnsbl.njabl.org (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. 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
10883(total number of IP addresses whose names were tested, including 433 at SDSC)
2429(union of all domain zones)
1626abuse.rfc-ignorant.org
1530whois.rfc-ignorant.org (union of all results)
1259whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
271whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
16postmaster.rfc-ignorant.org
12dsn.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
7369(total number of domains tested, including 237 at SDSC)
1196(union of all domain zones)
537whois.rfc-ignorant.org (union of all results)
530abuse.rfc-ignorant.org
377whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
248postmaster.rfc-ignorant.org
196dsn.rfc-ignorant.org
160whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
29ex.dnsbl.org (union of all results)
24ex.dnsbl.org (result 127.0.0.2 = spamsites)
6in.dnsbl.org (union of all results)
5bandwidth-pigs.monkeys.com
5ex.dnsbl.org (result 127.0.0.3 = spam source)
3in.dnsbl.org (result 127.0.0.2 = spam source)
3in.dnsbl.org (result 127.0.0.6 = unconfirmed opt-in)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 12 March 2003.