Port 399 — iso-tsap-c2

Well-known port 399 (tcp/udp): ISO Transport Class 2 Non-Control over TCP. Service name: iso-tsap-c2.

port kind port status standard verification verified tier A iana-registry-row@1

registry record

value: 399

Service Name	iso-tsap-c2
Port Number	399
Transport Protocol	tcp
Description	ISO Transport Class 2 Non-Control over TCP
Assignee	[Yanick_Pouffary]
Contact	[Yanick_Pouffary]
Registration Date
Modification Date
Reference
Service Code
Unauthorized Use Reported
Assignment Notes

source: https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.csv
version: IANA registry, Last-Modified: Fri, 29 May 2026 01:11:28 GMT
retrieved: 2026-05-29 · updated: 2026-05-29

agent: curl -H 'accept: application/json' wire.phall.io/port/399 or /port/399.json