Port 9956AllJoyn Name Service

UDP port 9956 carries AllJoyn service discovery traffic, advertising and finding services on a local network.

transport: udp
in transit: cleartext
assignment: official
risk: 2/10
lookups: 0

also known as AJNS

Technical Details

what runs on :9956

AllJoyn Name Service uses UDP port 9956 for service discovery: devices send announcements and discovery queries so peers can find advertised AllJoyn names. It is typically used with multicast on the local network; discovery is separate from the subsequent AllJoyn session traffic, which may use other transports such as TCP (commonly port 9955).

Security Information

exposure of :9956

risk score

2/ 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 1,864 ports — this one sits 0.6 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

Discovery traffic is not encrypted by default, so service names and announcements may be visible to devices on the same network. This port is generally intended for local-network discovery, not direct internet exposure; restrict it to trusted interfaces and networks.

Record

iana registry entry

port: :9956
service: AllJoyn Name Service
transport: UDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services IoT
usage: AllJoyn devices and applications use this UDP service to discover bus names and services on the local network. Engineers are most likely to encounter it in IoT or smart-device environments using the AllJoyn framework.
lookups: 0rank 993
added: 2026-10-16
updated: 2026-10-16
references: IANA service name registry — port 9956

Something wrong?

This record is maintained by the engineers who use port 9956. 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 2026-10-16.

01edit any field on a page of its own
02a model checks it for accuracy and spam
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edit this record →back to the registry

Related Ports

all 1,864 in network services →

the 8 most looked-up other ports in network services — 1,864 ports carry that label.

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:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
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:5938	TeamViewer	TCPUDP	Remote Access	caution	65.0k
:8291	Winbox MikroTik Admin	TCP	Security	caution	62.9k
:3233	WhiskerControl Protocol	TCPUDP	Network Services	caution	61.9k
:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:3128	Tatsoft Default HTTP Proxy	TCP	Web Services	caution	46.8k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :9956AllJoyn Name Service

Technical Details

Security Information

Related Ports

Port 9956AllJoyn Name Service