IANA lists at least one assignment on 28 of the 1,000 numbers from 16000 to 16999, 2.8%. The longest stretch with no assignment on any protocol runs from 16386 to 16618 (233 numbers). 10 numbers here are assigned on TCP alone and 2 on UDP alone. Of the 22 dated assignments, the earliest recorded date is October 2003 (sun-sea-port on 16161); the latest is June 2, 2015, for cadsisvr on 16789.
One square per number, 16000 at top left. Outlined squares have their own page.TCP and UDPTCP onlyUDP onlySCTP or DCCP onlyno assignment
Every assigned number from 16000 to 16999
16000–16099 · 6 numbers assigned
Port
Service
Protocols
Label
Registered
16000
fmsas
TCP
Administration Server Access
Oct 6, 2010
16001
fmsascon
TCP
Administration Server Connector
Oct 6, 2010
16002
gsms
TCP
GoodSync Mediation Service
Oct 6, 2010
16003
alfin
UDP
Automation and Control by REGULACE.ORG
Oct 6, 2010
16004–16019: no assignment, 16 numbers
16020
jwpc
TCP
Filemaker Java Web Publishing Core
May 12, 2010
16021
jwpc-bin
TCP
Filemaker Java Web Publishing Core Binary
May 12, 2010
16022–16099: no assignment, 78 numbers
16100–16199 · 2 numbers assigned
Port
Service
Protocols
Label
Registered
16100–16160: no assignment, 61 numbers
16161
sun-sea-port
TCPUDP
Solaris SEA Port
Oct 2003
16162
solaris-audit
TCP
Solaris Audit - secure remote audit log
May 7, 2009
16163–16199: no assignment, 37 numbers
16200–16299: no assignment, 100 numbers
16300–16399 · 9 numbers assigned
Port
Service
Protocols
Label
Registered
16309
etb4j
TCPUDP
etb4j
Nov 2004
16310
pduncs
TCPUDP
Policy Distribute, Update Notification
Aug 2006
16311
pdefmns
TCPUDP
Policy definition and update management
Apr 2007
16312–16359: no assignment, 48 numbers
16360
netserialext1
TCPUDP
Network Serial Extension Ports One
—
16361
netserialext2
TCPUDP
Network Serial Extension Ports Two
—
16367
netserialext3
TCPUDP
Network Serial Extension Ports Three
—
16368
netserialext4
TCPUDP
Network Serial Extension Ports Four
—
16369–16383: no assignment, 15 numbers
16384
connected
TCPUDP
Connected Corp
Feb 2004
16385
rdgs
TCP
Reliable Datagram Sockets
Apr 30, 2015
16386–16399: no assignment, 14 numbers
16400–16599: no assignment, 200 numbers
16600–16699 · 3 numbers assigned
Port
Service
Protocols
Label
Registered
16600–16618: no assignment, 19 numbers
16619
xoms
TCP
X509 Objects Management Service
Sep 8, 2008
16620–16664: no assignment, 45 numbers
16665
axon-tunnel
TCP
Reliable multipath data transport for high latencies
Sep 26, 2014
16666
vtp
UDP
Vidder Tunnel Protocol
Oct 24, 2011
16667–16699: no assignment, 33 numbers
16700–16799 · 1 number assigned
Port
Service
Protocols
Label
Registered
16700–16788: no assignment, 89 numbers
16789
cadsisvr
TCP
This server provides callable services to mainframe External Security Managers from any TCP/IP platform