▁established ▁with ▁the ▁North ▁American ▁Number ing ▁Plan ▁in ▁ 1 9 4 7 . ▁In ▁ 1 9 8 4 , ▁the ▁number ing ▁plan ▁area ▁( N PA ) ▁was ▁divided ▁by ▁splitting ▁Brook lyn , ▁Queens , ▁and ▁St aten ▁Island ▁into ▁a ▁separate ▁number ing ▁plan ▁area ▁with ▁area ▁code ▁ 7 1 8 , ▁reducing ▁ 2 1 2 ▁to ▁only ▁Manh attan ▁and ▁The ▁Bron x . ▁ ▁In ▁ 1 9 9 0 , ▁The ▁New ▁York ▁Tele phone ▁Company ▁wanted ▁to ▁assign ▁a ▁new ▁area ▁code ▁( 9 1 7 ) ▁to ▁all ▁cell ph ones ▁and ▁pag ers ▁in ▁Manh attan ▁and ▁all ▁tele phone ▁lines ▁in ▁The ▁Bron x , ▁to ▁rel ieve ▁number ▁short ages ▁in ▁Manh attan , ▁but ▁the ▁New ▁York ▁Public ▁Service ▁Commission ▁denied ▁the ▁request . ▁ ▁Instead , ▁in ▁ 1 9 9 2 , ▁number ing ▁plan ▁area ▁ 2 1 2 ▁was ▁reduced ▁to ▁Manh attan , ▁and ▁Mar ble ▁Hill ▁and ▁the ▁Bron x ▁were ▁integrated ▁into ▁ 7 1 8 . ▁All ▁bor ough s ▁were ▁provided ▁with ▁the ▁additional ▁area ▁code ▁ 9 1 7 , ▁arranged ▁in ▁an ▁overlay ▁plan . ▁ ▁Int rodu ced ▁on ▁February ▁ 4 , ▁ 1 9 9 2 , ▁area ▁code ▁ 9 1 7 ▁was ▁the ▁first ▁overlay ▁area ▁code ▁in ▁the ▁North ▁American ▁Number ing ▁Plan . ▁When ▁it ▁was ▁established , ▁all ▁cell ph ones ▁in ▁New ▁York ▁City ▁were ▁switched