IANA lists at least one assignment on 25 of the 3,000 numbers from 28000 to 30999, 0.8%, the third-lowest share among the 30 User Port ranges on this site. The longest stretch with no assignment on any protocol runs from 29170 to 29998 (829 numbers). 9 numbers here are assigned on TCP alone and 3 on UDP alone. Of the 25 dated assignments, the earliest recorded date is March 2002, shared by 2 numbers; the latest is May 28, 2026, for dilithium3 on 30939. 29118, 29168, 29169 and 30100 have an SCTP entry as well.
One square per number, 28000 at top left. Outlined squares have their own page.TCP and UDPTCP onlyUDP onlySCTP or DCCP onlyno assignment
Every assigned number from 28000 to 30999
28000–28099 · 4 numbers assigned
Port
Service
Protocols
Label
Registered
28000
nxlmd
TCPUDP
NX License Manager
Nov 2004
28001
pqsp
TCP
PQ Service
Sep 15, 2009
28010
gruber-cashreg
TCP
Gruber cash registry protocol
Dec 31, 2019
28011–28079: no assignment, 69 numbers
28080
thor-engine
TCP
thor/server - ML engine
Sep 29, 2021
28081–28099: no assignment, 19 numbers
28100–28199 · 1 number assigned
Port
Service
Protocols
Label
Registered
28100–28118: no assignment, 19 numbers
28119
a27-ran-ran
UDP
A27 cdma2000 RAN Management
Apr 13, 2012
28120–28199: no assignment, 80 numbers
28200–28299 · 2 numbers assigned
Port
Service
Protocols
Label
Registered
28200
voxelstorm
TCPUDP
VoxelStorm game server
Nov 8, 2012
28201–28239: no assignment, 39 numbers
28240
siemensgsm
TCPUDP
Siemens GSM
Nov 2004
28241–28299: no assignment, 59 numbers
28300–28499: no assignment, 200 numbers
28500–28599 · 1 number assigned
Port
Service
Protocols
Label
Registered
28500–28588: no assignment, 89 numbers
28589
bosswave
TCP
Building operating system services wide area verified exchange
Jun 13, 2016
28590–28599: no assignment, 10 numbers
28600–28999: no assignment, 400 numbers
29000–29099 · 1 number assigned
Port
Service
Protocols
Label
Registered
29000
saltd-licensing
TCP
Siemens Licensing Server
Jun 8, 2020
29001–29099: no assignment, 99 numbers
29100–29199 · 4 numbers assigned
Port
Service
Protocols
Label
Registered
29100–29117: no assignment, 18 numbers
29118
sgsap
SCTP
SGsAP in 3GPP
Jun 11, 2009
29119–29166: no assignment, 48 numbers
29167
otmp
TCPUDP
ObTools Message Protocol
Feb 2006
29168
sbcap
SCTP
SBcAP in 3GPP
Jun 11, 2009
29169
iuhsctpassoc
SCTP
HNBAP and RUA Common Association
Sep 8, 2009
29170–29199: no assignment, 30 numbers
29200–29899: no assignment, 700 numbers
29900–29999 · 1 number assigned
Port
Service
Protocols
Label
Registered
29900–29998: no assignment, 99 numbers
29999
bingbang
TCP
data exchange protocol for IEC61850 in wind power plants
Oct 15, 2012
30000–30099 · 5 numbers assigned
Port
Service
Protocols
Label
Registered
30000
ndmps
TCP
Secure Network Data Management Protocol
Feb 5, 2013
30001
pago-services1
TCPUDP
Pago Services 1
Mar 2002
30002
pago-services2
TCPUDP
Pago Services 2
Mar 2002
30003
amicon-fpsu-ra
TCPUDP
Amicon FPSU-IP Remote Administration
Apr 25, 2013
30004
amicon-fpsu-s
UDP
Amicon FPSU-IP VPN
Apr 25, 2013
30005–30099: no assignment, 95 numbers
30100–30199 · 1 number assigned
Port
Service
Protocols
Label
Registered
30100
rwp
TCPSCTP
Remote Window Protocol
May 20, 2015
30101–30199: no assignment, 99 numbers
30200–30299 · 1 number assigned
Port
Service
Protocols
Label
Registered
30200–30259: no assignment, 60 numbers
30260
kingdomsonline
TCPUDP
Kingdoms Online (CraigAvenue)
Aug 18, 2009
30261–30299: no assignment, 39 numbers
30300–30399: no assignment, 100 numbers
30400–30499 · 1 number assigned
Port
Service
Protocols
Label
Registered
30400
gs-realtime
TCP
GroundStar RealTime System
Aug 10, 2017
30401–30499: no assignment, 99 numbers
30500–30799: no assignment, 300 numbers
30800–30899 · 1 number assigned
Port
Service
Protocols
Label
Registered
30800–30831: no assignment, 32 numbers
30832
samsung-disc
UDP
Samsung Convergence Discovery Protocol
May 29, 2013
30833–30899: no assignment, 67 numbers
30900–30999 · 2 numbers assigned
Port
Service
Protocols
Label
Registered
30900–30938: no assignment, 39 numbers
30939
dilithium3
TCPUDP
Persistent peer-to-peer connections for block propagation, transaction relay, and BFT consensus message exchange.