3128
squid
TCP · 0x0C38
Port 3128 — squid
Networking
Port 3128 carries Squid proxy 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
- Squid proxy (squid)
- Kind
- Networking
- Protocol
- TCP
- Range
- Registered
- Root needed
- No
- Hexadecimal
- 0x0C38
- Binary
- 0000110000111000
- Two bytes
- 12 · 56
Same kind
Running the network itself — handing out addresses, announcing routes, digging tunnels.
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 3128 used for?
Squid proxy (squid) uses it, over TCP.
Q. Does opening port 3128 need root?
No. It is above 1023, so an ordinary user can open it.
Q. Which range does port 3128 fall in?
Registered (1024–49151). In hex it is 0x0C38.
Q. Does port 3128 have a twin?
Not a separate one. It either was encrypted from the start or negotiates TLS on the same number.