latest news: Nov 24: the whois tab now also works on IP-numbers

adstar.com.s5b2.psmtp.com

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adstar.com.s5b2.psmtp.com has one IP record. ca.s5b2.psmtp.com, com.s5b2.psmtp.com, uk.mail4.psmtp.com, edu.s5b2.psmtp.com, org.s5b2.psmtp.com and at least 100 other hosts point to the same IP. wd.com, psi.com, kmm.com, zam.com, olf.com and at least 100 other hosts use this as a mailserver.

base	record	name	ip	reverse	route	as
adstar.com.s5b2.psmtp.com	a		64.18.4.14 220 Postini ESMTP 197 y6_14_14c0 ready. ...	s5b2.psmtp.com	64.18.4.0/24 LLNW cust	AS26910 Postini Network
*.com.s5b2.psmtp.com
com.s5b2.psmtp.com
*.s5b2.psmtp.com

dot

hostnames sharing ip with a-records
1scom.net.mail4.psmtp.com 7cities.mail4.psmtp.com 7cities.net.7cities.mail4.psmtp.com aimteam.com.s5b2.psmtp.com allposters.com.mail4.psmtp.com america.net.mail4.psmtp.com appliedtheory.com.s5b2.psmtp.com ashlarny.com.s5b2.psmtp.com astm.org.s5b2.psmtp.com atlasventure.co.uk.mail4.psmtp.com
(only showing 10 results)

domains using this as mailserver
1scom.net advicepoint.com affinitymedia.com aguirre-is.com aimteam.com america.net amzak.com ashlarny.com attinghouse.com bluebirdpartners.com
(only showing 10 results)

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