Mandatory 10-digit dialing begins Sunday in Oregon, which now has a 458 area code to go along with 971, 541 and the original 503. The 458 has been “overlayed” into the 541 area, which consists of all ...

Three little digits will make a big difference for mid-valley residents who place a phone call after Jan. 1, 2010. That’s when Oregon adds a new 458 area code and mandatory 10-digit dialing. According ...

ONTARIO, Ore. (AP) — A new 458 area code for Eastern Oregon is going into operation this summer. For many residents of rural areas it will also mean conversion to 10-digit dialing from seven digits.