Port 49001Nuance Unity Service Request Protocol

TCP port 49001 is assigned to Nuance Unity Service Request Protocol, a Nuance Communications service.

transport: tcp
in transit: cleartext
assignment: official
risk: 1/10
lookups: 0

also known as nusrp

1 other service is registered on port 49001. compare all 2 →

Technical Details

what runs on :49001

Nuance Unity Service Request Protocol is registered on port :49001 over tcp to Nuance Communications Inc3, assigned April 2017. We don't have a technical write-up for it beyond the IANA registry entry.

In nmap's internet-wide scan data this port is never observed open, so if it's open on your network it's more likely a custom or misconfigured service than the registered one.

find what's listening on :49001

this machine

# linux
sudo ss -tlpn 'sport = :49001'

# macos / bsd
sudo lsof -nP -i :49001

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :49001

another host

nmap -sV -p T:49001 <host>

run it? the handshake, the implementations you meet in the wild and the flags that matter come from the engineers who do.

add technical details

Security Information

exposure of :49001

risk score

1/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp

every listening transport is another surface to filter at the edge

security overview

no security notes recorded for :49001 yet

known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.

Record

iana registry entry

port: :49001
service: Nuance Unity Service Request Protocol
transport: TCP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns TCP 49001 to Nuance Unity Service Request Protocol, registered to Nuance Communications Inc. There is not enough established public information to identify typical deployments or behavior.
lookups: 0rank 993
added: 2026-10-21
updated: 2026-10-21
references: IANA service name registry — port 49001

Something wrong?

This record is maintained by the engineers who use port 49001. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-10-21.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

Related Ports

browse categories →

ports registered around :49001, by lookups.

port	service	proto	category	risk	views
:49000	Matahari Broker	TCP	System	safe	0
:49001	Nuance Unity Service Discovery Protocol	UDP	Network Services	safe	0

risk mix of the 2 listed

safe100%

0 of 2 encrypted

Port :49001Nuance Unity Service Request Protocol

Technical Details

Security Information

Related Ports

Port 49001Nuance Unity Service Request Protocol