Port 38638Premier SQL Middleware Server

TCP/38638 is assigned to Premier SQL Middleware Server, with no widely documented implementation or usage.

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

also known as psqlmws

Technical Details

what runs on :38638

Premier SQL Middleware Server is registered on port :38638 over tcp to Brain Patchwork DX LLC, assigned February 2022. 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 :38638

this machine

# linux
sudo ss -tlpn 'sport = :38638'

# macos / bsd
sudo lsof -nP -i :38638

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :38638

another host

nmap -sV -p T:38638 <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 :38638

risk score

1/ 10safe

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

databases averages 3.8 across 175 ports — this one sits 2.8 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

no security notes recorded for :38638 yet

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

Record

iana registry entry

port: :38638
service: Premier SQL Middleware Server
transport: TCP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: Databases
usage: The IANA assignment names the service as Premier SQL Middleware Server and lists Brain Patchwork DX LLC as its registrant. No established, widely documented deployment or behavior is known for this port.
lookups: 0rank 993
added: 2026-10-20
updated: 2026-10-20
references: IANA service name registry — port 38638

Something wrong?

This record is maintained by the engineers who use port 38638. 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 2026-10-20.

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 175 in databases →

the 8 most looked-up other ports in databases — 175 ports carry that label.

port	service	proto	category	risk	views
:8882	Atlasz Secure App Server	TCP	Web Services	caution	66.9k
:9001	ETL Service Manager	TCPUDP	Databases	caution	28.6k
:2484	Oracle SSL Listener	TCPUDPtls	Security	caution	25.0k
:5495	Applix TM1 Admin	TCP	Databases	caution	24.8k
:591	FileMaker Web Sharing	TCP	Web Services	caution	23.1k
:1521	Oracle TNS Listener	TCP	Security	caution	19.6k
:21001	AMLFilter Admin	TCP	Security	caution	19.2k
:18206	Audition FAM DB	TCPUDP	Databases	caution	19.1k

risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :38638Premier SQL Middleware Server

Technical Details

Security Information

Related Ports

Port 38638Premier SQL Middleware Server