8883
mqtts
TCP · 0x22B3
Port 8883 — mqtts
Messaging
Port 8883 carries MQTT over TLS over TCP. Above 1023, so an ordinary user can open it.
1024–49151. Meant to be applied for, though some numbers here are custom by habit.
Where it sits in 65535
A port number is 16 bits, so it stops at 65535. The narrow band at the left is everything up to 1023.
065535
- Service
- MQTT over TLS (mqtts)
- Kind
- Messaging
- Protocol
- TCP
- Range
- Registered
- Root needed
- No
- Hexadecimal
- 0x22B3
- Binary
- 0010001010110011
- Two bytes
- 34 · 179
- Plain twin
- 1883
Same kind
Passing messages along, or queueing them up.
Ports next to it
How to read this
- A port number is 16 bits, so it runs 0 to 65535. There is no port 65536.
- Opening anything at or below 1023 needs root on Unix.
- Plain and encrypted often live on different numbers — 80 and 443, for one.
- Numbers like 3000 and 8080 were never registered; those are marked as custom.
Frequently asked questions
Q. What is port 8883 used for?
MQTT over TLS (mqtts) uses it, over TCP.
Q. Does opening port 8883 need root?
No. It is above 1023, so an ordinary user can open it.
Q. Which range does port 8883 fall in?
Registered (1024–49151). In hex it is 0x22B3.
Q. What does port 8883 wrap?
It is port 1883 wrapped in TLS.