Port 9955AllJoyn Standard Messaging

TCP port 9955 is the IANA contact port for AllJoyn standard messaging, used by AllJoyn-enabled devices and applications.

inNetwork Services IoT

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

also known as alljoyn-stm

1 other service is registered on port 9955. compare all 2 →

Technical Details

what runs on :9955

TCP 9955 is assigned to AllJoyn standard messaging. AllJoyn uses a bus-and-router model and a D-Bus-derived message format for communication between applications and devices; the router mediates message exchange. This is a protocol-specific contact port, not a universal indication that every AllJoyn deployment listens on a fixed port: availability depends on the device and its configuration. The traffic is not encrypted by default in every deployment; AllJoyn security and encryption depend on the application's configuration.

Security Information

exposure of :9955

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

tcp

every listening transport is another surface to filter at the edge

security overview

Do not expose an AllJoyn listener to the public internet unless the deployment specifically requires it and its authentication and security policies have been reviewed. AllJoyn services can expose device capabilities and application methods to connected peers, so an improperly secured listener may permit unwanted interaction; use it only on intended networks and enable the security features appropriate to the application.

Record

iana registry entry

port: :9955
service: AllJoyn Standard Messaging
transport: TCP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services IoT
usage: This port is assigned as the contact port for AllJoyn standard messaging, an IoT-oriented messaging framework developed by the AllSeen Alliance with Qualcomm Innovation Center involvement. An AllJoyn router or device may use it for messaging; it is not a general-purpose service expected on ordinary hosts.
lookups: 0rank 993
added: 2026-10-16
updated: 2026-10-16
references: IANA service name registry — port 9955

Something wrong?

This record is maintained by the engineers who use port 9955. 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.

port	service	proto	category	risk	views
:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
:6543	Jetnet	UDP	Network Services	caution	65.3k
: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 :9955AllJoyn Standard Messaging

Technical Details

Security Information

Related Ports

Port 9955AllJoyn Standard Messaging