In the 90s there was a campaign about the new worldwide 10-digit phone number format.
So if you own some 31.x block, you could have a phone number which matches your IP.
So if you own some 31.x block, you could have a phone number which matches your IP.
[0] https://en.wikipedia.org/wiki/Universal_Personal_Telecommuni...
The US phone system had such a service for a few years (area code 500 iirc). It had so little uptake that it was shut down.
I think I'm wrong, it was about the 10-digit Dutch numbers.