A regional area code is a telephone prefix for a region of a country, rather than a single city or town and its environs.
The 610 area code is in Pennsylvania, more specifically the southeastern region, including Delaware and Philadelphia counties. It is in the same regional area as 484, 267, and 215.
The airport code for Tallahassee Regional Airport is TLH.
The airport code for Reading Regional Airport is RDG.
The airport code for Watertown Regional Airport is ATY.
The airport code for Idaho Falls Regional Airport is IDA.
The airport code for Ha'il Regional Airport is HAS.
The airport code for Anderson Regional Airport is AND.
The airport code for Gettysburg Regional Airport is GTY.
The airport code for Joliet Regional Airport is JOT.
The airport code for Roanoke Regional Airport is ROA.
The airport code for Abha Regional Airport is AHB.
The airport code for Pellston Regional Airport is PLN.