think i found the answer while looking for something different
http://www.lansweeper.com/kb/20/used-TCP-ports.html
Device detection by IP range scanning.
ICMP Ping
Port: 21 (FTP)
Port: 22 (SSH)
Port: 23 (Telnet)
Port: 25 (SMTP)
Port: 80 (HTTP)
Port: 135 (EPMAP)
Port: 139 (NetBIOS Session Service)
Port: 161 (SNMP)
Port: 443 (HTTPS)
Port: 445 (SMB)
Port: 5060 (SIP)
Port: 9100 (Jetdirect)