IANA lists at least one assignment on 28 of the 3,152 numbers from 46000 to 49151, 0.9%. The longest stretch with no assignment on any protocol runs from 46337 to 46997 (661 numbers). 10 numbers here are assigned on TCP alone and 2 on UDP alone. Of the 19 dated assignments, the earliest recorded date is November 2003 (iqobject on 48619); the latest is February 16, 2018, for juka on 48048.
One square per number, 46000 at top left. Outlined squares have their own page.TCP and UDPTCP onlyUDP onlySCTP or DCCP onlyno assignment
Every assigned number from 46000 to 49151
46000–46299: no assignment, 300 numbers
46300–46399 · 1 number assigned
Port
Service
Protocols
Label
Registered
46300–46335: no assignment, 36 numbers
46336
inedo
TCP
Listen port used for Inedo agent communication
Jan 12, 2016
46337–46399: no assignment, 63 numbers
46400–46899: no assignment, 500 numbers
46900–46999 · 2 numbers assigned
Port
Service
Protocols
Label
Registered
46900–46997: no assignment, 98 numbers
46998
spremotetablet
TCP
Connection between a desktop computer or server and a signature tablet to capture handwritten signatures
Jul 19, 2012
46999
mediabox
TCPUDP
MediaBox Server
Nov 2004
47000–47099 · 2 numbers assigned
Port
Service
Protocols
Label
Registered
47000
mbus
TCPUDP
Message Bus
—
47001
winrm
TCP
Windows Remote Management Service
Apr 29, 2009
47002–47099: no assignment, 98 numbers
47100–47199 · 1 number assigned
Port
Service
Protocols
Label
Registered
47100
jvl-mactalk
UDP
Configuration of motors connected to Industrial Ethernet
Dec 21, 2012
47101–47199: no assignment, 99 numbers
47200–47499: no assignment, 300 numbers
47500–47599 · 1 number assigned
Port
Service
Protocols
Label
Registered
47500–47556: no assignment, 57 numbers
47557
dbbrowse
TCPUDP
Databeam Corporation
—
47558–47599: no assignment, 42 numbers
47600–47699 · 1 number assigned
Port
Service
Protocols
Label
Registered
47600–47623: no assignment, 24 numbers
47624
directplaysrvr
TCPUDP
Direct Play Server
—
47625–47699: no assignment, 75 numbers
47700–47799: no assignment, 100 numbers
47800–47899 · 3 numbers assigned
Port
Service
Protocols
Label
Registered
47806
ap
TCPUDP
ALC Protocol
—
47808
bacnet
TCPUDP
Building Automation and Control Networks
Feb 10, 2011
47809
presonus-ucnet
UDP
PreSonus Universal Control Network Protocol
Jul 12, 2013
47810–47899: no assignment, 90 numbers
47900–47999: no assignment, 100 numbers
48000–48099 · 9 numbers assigned
Port
Service
Protocols
Label
Registered
48000
nimcontroller
TCPUDP
Nimbus Controller
—
48001
nimspooler
TCPUDP
Nimbus Spooler
—
48002
nimhub
TCPUDP
Nimbus Hub
—
48003
nimgtw
TCPUDP
Nimbus Gateway
—
48004
nimbusdb
TCP
NimbusDB Connector
Jan 24, 2011
48005
nimbusdbctrl
TCP
NimbusDB Control
Jan 24, 2011
48006–48047: no assignment, 42 numbers
48048
juka
TCP
Juliar Programming Language Protocol
Feb 16, 2018
48049
3gpp-cbsp
TCP
3GPP Cell Broadcast Service Protocol
Dec 7, 2009
48050
weandsf
TCP
WeFi Access Network Discovery and Selection Function
Jul 19, 2013
48051–48099: no assignment, 49 numbers
48100–48199 · 2 numbers assigned
Port
Service
Protocols
Label
Registered
48100–48127: no assignment, 28 numbers
48128
isnetserv
TCPUDP
Image Systems Network Services
May 2006
48129
blp5
TCPUDP
Bloomberg locator
May 2006
48130–48199: no assignment, 70 numbers
48200–48499: no assignment, 300 numbers
48500–48599 · 1 number assigned
Port
Service
Protocols
Label
Registered
48500–48555: no assignment, 56 numbers
48556
com-bardac-dw
TCPUDP
com-bardac-dw
—
48557–48599: no assignment, 43 numbers
48600–48699 · 2 numbers assigned
Port
Service
Protocols
Label
Registered
48600–48618: no assignment, 19 numbers
48619
iqobject
TCPUDP
iqobject
Nov 2003
48620–48652: no assignment, 33 numbers
48653
robotraconteur
TCPUDP
Robot Raconteur transport
Jan 27, 2014
48654–48699: no assignment, 46 numbers
48700–48999: no assignment, 300 numbers
49000–49099 · 2 numbers assigned
Port
Service
Protocols
Label
Registered
49000
matahari
TCP
Matahari Broker
Aug 31, 2011
49001
nusdp-disc nusrp
TCPUDP
Nuance Unity Service Discovery Protocol Nuance Unity Service Request Protocol