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 许可的 query-mobile-phone-area 1.0.6 本地号码段数据；只取前 7 位做参考，携号转网和新号段可能不准确，不保存完整号码
Enter the parameters to see the result.
Example: Enter a value to see the result.
