What port does MQTT use?

MQTT uses port 1883, 8883 by default.

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Message Queuing Telemetry Transport

Q: What is Message Queuing Telemetry Transport?

Message Queuing Telemetry Transport (MQTT) is a Application Layer protocol in the Messaging category. Lightweight publish-subscribe messaging protocol designed for IoT and constrained devices. Minimizes bandwidth and battery usage with small packet overhead.

Application Layer — Messaging

Protocol Overview

Full Name Message Queuing Telemetry Transport

Abbreviation MQTT

OSI Layer Application Layer

Category Messaging

Default Port 1883, 8883

About MQTT

Lightweight publish-subscribe messaging protocol designed for IoT and constrained devices. Minimizes bandwidth and battery usage with small packet overhead.

Application Layer Messaging Port 1883, 8883

Related Protocols — Application Layer

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