Port 502 — mbap

Well-known port 502 (tcp/udp): Modbus Application Protocol. Service name: mbap.

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

registry record

value: 502

Service Name	mbap
Port Number	502
Transport Protocol	tcp
Description	Modbus Application Protocol
Assignee	[modbus.org]
Contact	[Dennis_Dube]
Registration Date
Modification Date	2014-06-10
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/502 or /port/502.json