 
 <prompt> Wetin happun first, 484 add to di 610 area or Southeastern Pennsylvania get di 215 area code? Given di previous question, write a context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: ```Southeastern Pennsylvania bin get di 215 area code for 1947 wen di North American Numbering Plan of di "Bell System" start to dey work. Di area wey di code cover come split almost into two for 1994 wen area code 610 show face, wit di city and im northern suburbs still dey use 215. Overlay area code 267 join di 215 service area for 1997, and 484 join di 610 area for 1999. One plan for 2001 to bring another overlay code for both service areas (area code 445 for 215, area code 835 for 610) come delay and later dem cancel am.``` 