Blacklists Compared

5 April 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
11920(total number of IP addresses tested, including 524 at SDSC)
8158(union of most IP zones)
5835xbl.selwerd.cx
4928blackholes.five-ten-sg.com (union of all results)
3526t1.bl.reynolds.net.au
2884blackholes.wirehub.net
2739block.blars.org
2405relays.osirusoft.com (union of all results)
2304no-more-funn.moensted.dk (union of all results)
2049dnsbl.njabl.org (union of all results)
1775unconfirmed.dsbl.org
1565blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
1464blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
1427list.dsbl.org
1390blackholes.five-ten-sg.com (result 127.0.0.3 = dialup)
1295blackholes.intersil.net
1285sbl.spamhaus.org
1280spamhaus.relays.osirusoft.com
1237relays.osirusoft.com (result 127.0.0.6 = spamsites)
1231bl.spamcop.net
1187dnsbl.sorbs.net (union of all results)
1175proxies.blackholes.wirehub.net
1164no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1159ztl.dorkslayers.com
1116proxies.relays.monkeys.com (result 127.0.0.2 = open proxy)
1116proxies.relays.monkeys.com (union of all results)
1075cn-kr.blackholes.us (union of all results)
996spews.bl.reynolds.net.au
983relays.osirusoft.com (result 127.0.0.4 = spam source)
976spews.relays.osirusoft.com
864ipwhois.rfc-ignorant.org
828dnsbl.njabl.org (result 127.0.0.9 = open proxy)
805blocktest.relays.osirusoft.com (not a blacklist!)
776dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
775dnsbl.njabl.org (result 127.0.0.4 = spam source)
767work.drbl.croco.net
671dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
645spam.dnsrbl.net
633ybl.megacity.org
621cw.blackholes.us
596cn-kr.blackholes.us (result 127.0.0.2 = China)
596china.blackholes.us
584no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
537opm.blitzed.org
518rackspace.blackholes.us
509spamsources.fabel.dk
479cn-kr.blackholes.us (result 127.0.0.3 = Korea)
479korea.blackholes.us
477korea.services.net
475dnsbl.delink.net
446blacklist.spambag.org
430blackholes.uceb.org (union of all results)
354blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
333spam.wytnij.to
314dnsbl.njabl.org (result 127.0.0.2 = source or relay)
303relays.osirusoft.com (result 127.0.0.2 = relay)
303inputs.relays.osirusoft.com
299no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
269multihop.dsbl.org
238blackholes.uceb.org (result 127.0.0.4 = spam source network)
227relays.osirusoft.com (result 127.0.0.9 = open proxy)
225flowgoaway.com
215socks.relays.osirusoft.com
201mail-abuse.blacklist.jippg.org
192brazil.blackholes.us
185verio.blackholes.us
181spamsources.relays.osirusoft.com (union of all results)
180spamguard.leadmon.net (union of all results)
170spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
166dun.dnsrbl.net
161spamguard.leadmon.net (result 127.0.0.2 = dialup)
156taiwan.blackholes.us
154internap.blackholes.us
152relays.bl.kundenserver.de
151dynablock.wirehub.net (result 127.0.0.2 = dialup)
151dynablock.wirehub.net (union of all results)
1503y.spam.mrs.kithrup.com
119dnsbl.njabl.org (result 127.0.0.3 = dialup)
118rr.blackholes.us
115level3.blackholes.us
114blackholes.uceb.org (result 127.0.0.3 = spam source)
113bl.deadbeef.com
113dialups.relays.osirusoft.com (union of all results)
110dialups.visi.com
109vox.schpider.com
105japan.blackholes.us
104no-more-funn.moensted.dk (result 127.0.0.9 = misc)
103relays.ordb.org
101dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
97blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
97blackhole.compu.net
92xo.blackholes.us
90dnsbl.sorbs.net (result 127.0.0.6 = spam source)
89no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
86relays.osirusoft.com (result 127.0.0.3 = dialup)
84orbs.dorkslayers.com
75blackholes.uceb.org (result 127.0.0.2 = relay)
71bl.deadbeef.com
70hongkong.blackholes.us
68spam.exsilia.net (union of all results)
65blackholes.brainerd.net
61spam.exsilia.net (result 127.0.0.2 = spam source)
54argentina.blackholes.us
50russia.blackholes.us
48dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
47tr.countries.nerd.dk
45interbusiness.blackholes.us
40inflow.blackholes.us
40inflow.noflow.org
32he.blackholes.us
32cybercon.blackholes.us
32no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
31above.blackholes.us
30wanadoo-fr.blackholes.us
27blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
25singapore.blackholes.us
22thailand.blackholes.us
21no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
20blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
19broadwing.blackholes.us
18spammers.v6net.org
18nigeria.blackholes.us
18eli.blackholes.us
17covad.blackholes.us
17spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
16blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
16proxies.relays.osirusoft.com
14dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
14dialup.blacklist.jippg.org (union of all results)
13malaysia.blackholes.us
13dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
12epoch.blackholes.us
12dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
12ph.rbl.cluecentral.net
11yipes.blackholes.us
11valuenet.blackholes.us
11dev.null.dk
10telstra.blackholes.us
10no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
10blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
9spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
9relays.dorkslayers.com
7pajo.blackholes.us
7spam.exsilia.net (result 127.0.0.3 = virus source)
5affinity.blackholes.us
3dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2valueweb.blackholes.us
2spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
2relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
1skynetweb.blackholes.us
1spamsites.relays.osirusoft.com (result 127.0.0.6)
1no-more-funn.moensted.dk (result 127.0.0.11 = repeated probes)
1blackholes.five-ten-sg.com (result 127.0.0.6 = relay)
1spamsites.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
11920(total number of IP addresses whose names were tested, including 524 at SDSC)
2980(union of all domain zones)
2110abuse.rfc-ignorant.org
1096whois.rfc-ignorant.org (union of all results)
747whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
349whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
31postmaster.rfc-ignorant.org
29dsn.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
7614(total number of domains tested, including 263 at SDSC)
1350(union of all domain zones)
715abuse.rfc-ignorant.org
526whois.rfc-ignorant.org (union of all results)
325postmaster.rfc-ignorant.org
313whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
247dsn.rfc-ignorant.org
213whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
90bl.deadbeef.com
28ex.dnsbl.org (union of all results)
26ex.dnsbl.org (result 127.0.0.2 = spamsites)
7bandwidth-pigs.monkeys.com
4in.dnsbl.org (union of all results)
3in.dnsbl.org (result 127.0.0.6 = unconfirmed opt-in)
2ex.dnsbl.org (result 127.0.0.3 = spam source)
1in.dnsbl.org (result 127.0.0.2 = spam source)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 9 April 2003.