Entity boundaryRegion vs. Telephone Area
A fixed-line code identifies a department-level numbering area rather than one city or an exact address. Lima and Callao share code 1, and each other listed code covers its whole department. Mobile numbers beginning with 9 are nationwide and do not use these geographic codes. Portability, call forwarding and VoIP can also weaken current-location or carrier inference.
A code listed beside a city reflects a featured numbering association; it does not assert that every community in Lima Department uses that code or that the code stops at the administrative border.