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