Well known ports, 28000 to 28999
Ports 27000 to 27999 Ports 29000 to 29999
Links: IANA port assignments.
PortProtocol
28000NX License Manager.
28001
-
28239		 
28240Siemens GSM.
28241
-
28999		 
Ports 27000 to 27999 Ports 29000 to 29999