Port 596SMSD

SMSD service traffic assigned to TCP and UDP port 596.

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

Technical Details

what runs on :596

SMSD is registered on port :596 over tcp and udp to Wayne Barlow. 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 found open rarely. What's listening is often not the registered service, so check before you assume.

find what's listening on :596

this machine

# linux
sudo ss -tulpn 'sport = :596'

# macos / bsd
sudo lsof -nP -i :596

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :596

another host

nmap -sV -p T:596 <host>
sudo nmap -sU -sV -p U:596 <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 :596

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 · udp

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

security overview

no security notes recorded for :596 yet

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

Record

iana registry entry

port: :596
service: SMSD
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: The registry identifies TCP and UDP port 596 as SMSD and assigns it to Wayne Barlow. No standard protocol behavior, implementation, or deployment footprint is documented in the supplied registry record.
lookups: 0rank 993
added: 2026-08-27
updated: 2026-08-27
references: IANA service name registry — port 596

Something wrong?

This record is maintained by the engineers who use port 596. 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 2026-08-27.

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 :596, by lookups.

port	service	proto	category	risk	views
:548	Apple Filing Protocol	TCP	File Transfer	caution	36.8k
:593	HTTP RPC Endpoint Mapper	TCPUDP	Network Services	caution	26.0k
:660	Mac OS X Server Admin	TCP	Remote Access	caution	23.7k
:591	FileMaker Web Sharing	TCP	Web Services	caution	23.1k
:623	ASF-RMCP	UDP	Remote Access	caution	20.5k
:563	NNTPS	TCPUDPtls	Web Services	safe	18.1k
:546	DHCPv6 Client	TCPUDP	Network Services	caution	16.6k
:636	LDAPS	TCPUDPtls	Security	caution	15.6k

risk mix of the 8 listed

safe13%
caution88%

2 of 8 encrypted

Port :596SMSD

Technical Details

Security Information

Related Ports

Port 596SMSD