Port 538 is open even tho scan does not report it

[capt <captain.harry () hotmail com>]

Using the

Starting Nmap 5.61TEST5 ( http://nmap.org ) at 2012-03-10 10:30 EST
Nmap scan report for 231.sub-75-203-62.myvzw.com (75.203.62.231)
Host is up (0.000023s latency).
Not shown: 99 closed ports
PORT   STATE SERVICE
80/tcp open  http

Nmap done: 1 IP address (1 host up) scanned in 0.56 seconds

Port 538 is open during this scan.

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