Use the local public number-prefix table to check an approximate province, city and carrier. Only the first seven digits are used for matching; the complete number is not sent or stored.
Data source：Open-source local number-prefix data: query-mobile-phone-area 1.0.6 (MIT) 使用 MIT 許可的 query-mobile-phone-area 1.0.6 本地號碼段數據；只取前 7 位做參考，攜號轉網和新號段可能不準確，不保存完整號碼
Enter the parameters to see the result.
Example: Enter a value to see the result.
