um.att.com is a domain controlled by three nameservers at attdns.com. All of them are on different IP networks. Incoming mail for um.att.com is handled by one mailserver at um.att.com themselves. um.att.com has one IP number , which also has a corresponding reverse pointer. www.um.att.com cnames to this hostname. www11.sbcuc.net point to the same IP. att.nl, att.fi, att.com, sbc.com, snet.com and at least 35 other hosts share nameservers with this domain. www.um.att.com, pat.um.att.com, mail.um.att.com, smtp.um.att.com, 8602333900.um.att.com and at least two other hosts are subdomains to this hostname. att.com is a domain controlled by three nameservers also at attdns.com. All of them are on different IP networks. Incoming mail for att.com is handled by three mailservers having a total of eight IP numbers. There are six duplicated IP numbers. Some of them are on the same IP network. att.com has two IP numbers. They are on different IP networks. um.att.com is hosted on a server in United States.