80
http
TCP · 0x0050
Port 80 — http
Web
Port 80 carries Web over TCP. Being at or below 1023, only root may open it on Unix. Its encrypted twin is 443.
0–1023. On Unix only root may open one.
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
- Web (http)
- Kind
- Web
- Protocol
- TCP
- Range
- Well-known
- Root needed
- Yes
- Hexadecimal
- 0x0050
- Binary
- 0000000001010000
- Two bytes
- 0 · 80
- Encrypted twin
- 443
Same kind
Where a browser knocks.
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 80 used for?
Web (http) uses it, over TCP.
Q. Does opening port 80 need root?
Yes. It is at or below 1023, so on Unix only root may open it.
Q. Which range does port 80 fall in?
Well-known (0–1023). In hex it is 0x0050.
Q. Is there an encrypted version of port 80?
Port 443 does the same thing wrapped in TLS.