Telephone Area Codes
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资源简介：
Maryland Telephone Area Code Boundaries represents the telephone area codes for the State of Maryland. They are also known as Numbering Plan Areas (NPA). The...
马里兰州电话区号边界数据集（Maryland Telephone Area Code Boundaries）涵盖了马里兰州的电话区号边界信息。此类编号区域亦被称为编号计划区（Numbering Plan Areas，简称NPA）。其……
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State of Maryland
