IANA lists at least one assignment on 41 of the 2,000 numbers from 23000 to 24999, 2.1%. The longest stretch with no assignment on any protocol runs from 23547 to 23999 (453 numbers). 7 numbers here are assigned on TCP alone and 4 on UDP alone. Of the 27 dated assignments, the earliest recorded date is August 2005 (ild on 24321); the latest is September 26, 2025, for udpstp on 24601.
One square per number, 23000 at top left. Outlined squares have their own page.TCP and UDPTCP onlyUDP onlySCTP or DCCP onlyno assignment
Every assigned number from 23000 to 24999
23000–23099 · 7 numbers assigned
Port
Service
Protocols
Label
Registered
23000
inovaport1
TCPUDP
Inova LightLink Server Type 1
Oct 2006
23001
inovaport2
TCPUDP
Inova LightLink Server Type 2
Oct 2006
23002
inovaport3
TCPUDP
Inova LightLink Server Type 3
Oct 2006
23003
inovaport4
TCPUDP
Inova LightLink Server Type 4
Oct 2006
23004
inovaport5
TCPUDP
Inova LightLink Server Type 5
Oct 2006
23005
inovaport6
TCPUDP
Inova LightLink Server Type 6
Oct 2006
23006–23052: no assignment, 47 numbers
23053
gntp
TCP
Generic Notification Transport Protocol
Feb 7, 2012
23054–23099: no assignment, 46 numbers
23100–23199: no assignment, 100 numbers
23200–23299 · 2 numbers assigned
Port
Service
Protocols
Label
Registered
23200–23271: no assignment, 72 numbers
23272
s102
UDP
S102 application
Aug 26, 2009
23273–23293: no assignment, 21 numbers
23294
5afe-dir 5afe-disc
TCPUDP
5AFE SDN Directory 5AFE SDN Directory discovery
Apr 1, 2016
23300–23399 · 1 number assigned
Port
Service
Protocols
Label
Registered
23300–23332: no assignment, 33 numbers
23333
elxmgmt
TCPUDP
Emulex HBAnyware Remote Management
Nov 6, 2007
23334–23399: no assignment, 66 numbers
23400–23499 · 5 numbers assigned
Port
Service
Protocols
Label
Registered
23400
novar-dbase
TCPUDP
Novar Data
Feb 2006
23401
novar-alarm
TCPUDP
Novar Alarm
Feb 2006
23402
novar-global
TCPUDP
Novar Global
Feb 2006
23403–23455: no assignment, 53 numbers
23456
aequus
TCP
Aequus Service
Feb 12, 2009
23457
aequus-alt
TCP
Aequus Service Mgmt
Feb 12, 2009
23458–23499: no assignment, 42 numbers
23500–23599 · 1 number assigned
Port
Service
Protocols
Label
Registered
23500–23545: no assignment, 46 numbers
23546
areaguard-neo
TCP
AreaGuard Neo - WebServer
May 31, 2012
23547–23599: no assignment, 53 numbers
23600–23999: no assignment, 400 numbers
24000–24099 · 7 numbers assigned
Port
Service
Protocols
Label
Registered
24000
med-ltp
TCPUDP
med-ltp
—
24001
med-fsp-rx
TCPUDP
med-fsp-rx
—
24002
med-fsp-tx
TCPUDP
med-fsp-tx
—
24003
med-supp
TCPUDP
med-supp
—
24004
med-ovw
TCPUDP
med-ovw
—
24005
med-ci
TCPUDP
med-ci
—
24006
med-net-svc
TCPUDP
med-net-svc
—
24007–24099: no assignment, 93 numbers
24100–24199: no assignment, 100 numbers
24200–24299 · 2 numbers assigned
Port
Service
Protocols
Label
Registered
24200–24241: no assignment, 42 numbers
24242
filesphere
TCPUDP
fileSphere
—
24249
vista-4gl
TCPUDP
Vista 4GL
—
24250–24299: no assignment, 50 numbers
24300–24399 · 4 numbers assigned
Port
Service
Protocols
Label
Registered
24300–24320: no assignment, 21 numbers
24321
ild
TCPUDP
Isolv Local Directory
Aug 2005
24322
hid
UDP
Transport of Human Interface Device data streams
Dec 14, 2012
24323
vrmg-ip
TCP
Verimag mobile class protocol over TCP
Aug 15, 2018
24324–24385: no assignment, 62 numbers
24386
intel-rci intel_rci
TCPUDP
Intel RCI Intel RCI
—
24387–24399: no assignment, 13 numbers
24400–24499 · 1 number assigned
Port
Service
Protocols
Label
Registered
24400–24464: no assignment, 65 numbers
24465
tonidods
TCPUDP
Tonido Domain Server
Jul 18, 2008
24466–24499: no assignment, 34 numbers
24500–24599 · 2 numbers assigned
Port
Service
Protocols
Label
Registered
24500–24553: no assignment, 54 numbers
24554
binkp
TCPUDP
BINKP
—
24555–24576: no assignment, 22 numbers
24577
bilobit bilobit-update
TCPUDP
bilobit Service bilobit Service Update
Aug 15, 2014
24578–24599: no assignment, 22 numbers
24600–24699 · 6 numbers assigned
Port
Service
Protocols
Label
Registered
24601
udpstp
UDP
UDP-based IP-Layer Capacity and Performance Measurement protocol
Sep 26, 2025
24602–24665: no assignment, 64 numbers
24666
sdtvwcam
TCP
Service used by SmarDTV to communicate between a CAM and a second screen application