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Is my IP address blacklisted?

Spam Database Lookup

Check to see if your IP addresses are listed with nearly 100 DNS based anti-spam databases! Will your mail server be blocked by DNSbl filters?

Probably the most common way of detecting spam is rejecting mail that comes from mail servers known (or believed) to send spam. This is done by taking the IP address of the remote mail server, converting it to a domain name using the ip4r format (a.b.c.d becomes d.c.b.a.lookupzone.com), and doing a lookup to check if that IP address is listed in one of the databases.

Just because the IP is listed with a particular blacklist does not mean that you are sending spam, just that particular blacklist suggests not to accept mail directly from that IP address. Most residential Cable/DSL IP addresses that are dynamically assigned will indicate that they are blacklisted, meaning you should be sending from your ISP's mail server, not a mail server running on your own internet connection.

If you have questions or would like to discuss DNS based blacklists please visit the DNS based Blacklists Forum.

Update September 2008 - We are in the process of adding details for each of the block lists. As we update each block list we'll activate a link on the list below. You can click on the link to learn more about that DNSbl. If you would like to be paid to write a summary of a DNSBL, If you know of a DNS based block list that is not below, or would like to assist us in providing details on existing ones please contact us.

FAQ: What is a DNSBL?

Please do not perform automated queries of this page.

Checking 38.103.63.60. Please wait a minute for the checks to complete.

access.redhawk.org
bl.csma.biz
bl.spamcannibal.org
bl.spamcop.net
bl.technovision.dk
blackholes.five-ten-sg.com
blackholes.wirehub.net
blacklist.sci.kun.nl
block.dnsbl.sorbs.net
blocked.hilli.dk
cart00ney.surriel.com
cbl.abuseat.org
dev.null.dk
dialup.blacklist.jippg.org
dialups.mail-abuse.org
dialups.visi.com
dnsbl.ahbl.org
dnsbl.antispam.or.id
dnsbl.cyberlogic.net
dnsbl.jammconsulting.com
dnsbl.kempt.net
dnsbl.njabl.org
dnsbl.sorbs.net
dnsbl-1.uceprotect.net
dnsbl-2.uceprotect.net
dnsbl-3.uceprotect.net
dsbl.dnsbl.net.au
duinv.aupads.org
dul.dnsbl.sorbs.net
dul.ru
fl.chickenboner.biz
hil.habeas.com
http.dnsbl.sorbs.net
http.opm.blitzed.org
intruders.docs.uu.se
korea.services.net
l1.spews.dnsbl.sorbs.net
l2.spews.dnsbl.sorbs.net
mail-abuse.blacklist.jippg.org
map.spam-rbl.com
misc.dnsbl.sorbs.net
msgid.bl.gweep.ca
multihop.dsbl.org
no-more-funn.moensted.dk
ohps.dnsbl.net.au
omrs.dnsbl.net.au
orid.dnsbl.net.au
orvedb.aupads.org
osps.dnsbl.net.au
osrs.dnsbl.net.au
owfs.dnsbl.net.au
owps.dnsbl.net.au
probes.dnsbl.net.au
proxy.bl.gweep.ca
psbl.surriel.com
pss.spambusters.org.ar
rbl.cluecentral.net
rbl.schulte.org
rbl.snark.net
rbl.triumf.ca
rdts.dnsbl.net.au
relays.bl.gweep.ca
relays.bl.kundenserver.de
relays.mail-abuse.org
relays.nether.net
ricn.dnsbl.net.au
rmst.dnsbl.net.au
rsbl.aupads.org
satos.rbl.cluecentral.net
sbl.csma.biz
sbl.spamhaus.org
sbl-xbl.spamhaus.org
smtp.dnsbl.sorbs.net
socks.dnsbl.sorbs.net
socks.opm.blitzed.org
sorbs.dnsbl.net.au
spam.dnsbl.sorbs.net
spam.olsentech.net
spam.wytnij.to
spamguard.leadmon.net
spamsites.dnsbl.net.au
spamsources.dnsbl.info
spamsources.fabel.dk
spews.dnsbl.net.au
t1.dnsbl.net.au
ucepn.dnsbl.net.au
unconfirmed.dsbl.org
web.dnsbl.sorbs.net
whois.rfc-ignorant.org
will-spam-for-food.eu.org
wingate.opm.blitzed.org
xbl.spamhaus.org
zen.spamhaus.org
zombie.dnsbl.sorbs.net

Legend:
= Not Listed
= Listed
= Timeout Error
= Offline


Last Updated Monday, January 05 2009 @ 07:43 pm PST