In the NYC vicinity, dialing the -9901 suffix on many phone exchanges will give you a recorded message identifying the central office you reached. For example, if you call (212) 736-9901, it tells you that the switch is on West 36th Street[1] and a list of area codes/prefixes it serves. Amusingly, the switch still identifies itself as "Bell Atlantic", which is what the local Regional Bell Operating Company was called before it became "Verizon" in 2000 (it was also briefly "NYNEX").[2]
In the NYC vicinity, dialing the -9901 suffix on many phone exchanges will give you a recorded message identifying the central office you reached. For example, if you call (212) 736-9901, it tells you that the switch is on West 36th Street[1] and a list of area codes/prefixes it serves. Amusingly, the switch still identifies itself as "Bell Atlantic", which is what the local Regional Bell Operating Company was called before it became "Verizon" in 2000 (it was also briefly "NYNEX").[2]
[1] This building, apparently: https://skyscraperpage.com/cities/?buildingID=69989
[2] https://en.wikipedia.org/wiki/Verizon_Communications#Bell_At...