Nmap scan report for persona.yammer.com (13.107.6.159)
Host is up (0.00036s latency).
Other addresses for persona.yammer.com (not scanned): 2620:1ec:a92::159
Not shown: 997 filtered tcp ports (no-response)
PORT STATE SERVICE
53/tcp closed domain
80/tcp open http
443/tcp open https
Nmap done: 1 IP address (1 host up) scanned in 4.64 seconds