When those remaining numbers are exhausted all future phone number assignments will be made in the new 227 area code. Under the implementation plan approved by the PSC, no new 227 numbers will be assigned in the area until the remaining 240/301 numbers are completely exhausted. The remaining supply of available telephone numbers in the 240/301 area is estimated to be exhausted in the second quarter of 2023 – requiring the establishment of a new area code to support future demands in the region.Ĭustomers with a 240 or 301 area code will maintain their existing area codes and their phone numbers will not change. Area code locations are also listed by city next to the area code maps on this page. The area codes locator shows the coverage area for each phone number area code. Below, are the major cities in the area code (301). Other impacted counties are Frederick, Howard, Carroll, and Anne Arundel. 289 Area Code: Area Code 301 Maryland : Bethesda, Gaithersburg, Bowie : 301 Area Code: Area Code 302 Delaware : Wilmington, Dover, Newark : 302 Area Code. The 240/301 calling area serves residents and businesses in Allegany, Charles, Garrett, Montgomery, Prince George's, St. 3 to approve a petition filed by the North American Numbering Plan Administrator, which is the neutral third-party entity that allocates telephone numbering resources. The new area code will eventually serve the same geographic area in Maryland currently served by the 240 and 301 area codes. The Maryland Public Service Commission on Wednesday announced the assignment of 227 as a new area code.

Phone number 301 area code