AT&T Corp. SBCIS-SBIS (NET-99-87-192-0-1) 99.87.192.0 - 99.105.127.255 Private Customer - AT&T Internet Services SBC-99-91-196-184-29-1702285903 (NET-99-91-196-184-1) 99.91.196.184 - 99.91.196.191