Whats this port on my wall?

[Hypertive]

I can't tell if it's ethernet or what

[WereCatf]

1 minute ago, Hypertive said:

I can't tell if it's ethernet or what

Ethernet has more pins, so no, that's not it. Looks to be some sort of a telephone-connection, maybe ISDN.

[Hypertive]

2 minutes ago, WereCatf said:

Ethernet has more pins, so no, that's not it. Looks to be some sort of a telephone-connection, maybe ISDN.

This has 6 pins, but the port is also not symmetrical

[Oshino Shinobu]

Telephone socket (specifically a BT 631A socket)

[Vishera]

That's for the telephone.