11211
memcached
TCP and UDP · 0x2BCB
Port 11211 — memcached
Databases
Port 11211 carries Memcached over TCP and UDP. 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
- Memcached (memcached)
- Kind
- Databases
- Protocol
- TCP and UDP
- Range
- Registered
- Root needed
- No
- Hexadecimal
- 0x2BCB
- Binary
- 0010101111001011
- Two bytes
- 43 · 203
Same kind
Where a database waits for queries.
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 11211 used for?
Memcached (memcached) uses it, over both TCP and UDP.
Q. Does opening port 11211 need root?
No. It is above 1023, so an ordinary user can open it.
Q. Which range does port 11211 fall in?
Registered (1024–49151). In hex it is 0x2BCB.
Q. Does port 11211 have a twin?
Not a separate one. It either was encrypted from the start or negotiates TLS on the same number.