Port 49001Nuance Unity Service Discovery Protocol

UDP port assigned to Nuance Unity Service Discovery Protocol, a service-discovery endpoint registered to Nuance Communications.

inNetwork Services

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

also known as nusdp-disc

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

Technical Details

what runs on :49001

Nuance Unity Service Discovery Protocol is registered on port :49001 over udp 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 -ulpn 'sport = :49001'

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

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

another host

sudo nmap -sU -sV -p U: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.

network services averages 2.6 across 2,026 ports — this one sits 1.6 below.

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

udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

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 Discovery Protocol
transport: UDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: Network Services
usage: IANA assigns UDP/49001 to Nuance Unity Service Discovery Protocol and lists Nuance Communications Inc. as the registrant. Publicly established details about deployments or behavior are limited.
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

all 2,026 in network services →

the 8 most looked-up other ports in network services — 2,026 ports carry that label.

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:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
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:3128	Tatsoft Default HTTP Proxy	TCP	Web Services	caution	46.8k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :49001Nuance Unity Service Discovery Protocol

Technical Details

Security Information

Related Ports

Port 49001Nuance Unity Service Discovery Protocol