https://en.wikipedia.org/wiki/Point_of_presence

https://en.wikipedia.org/wiki/Telephone_exchange_names#Stand...

  76x-nnnn: POplar, POrter, ROckwell, ROger(s), SOuth(field)

411 Directory Assistance in 1978 https://youtu.be/UpsGpZ7wi9k?si=gSKP2K7WGPn-cbBj&t=60