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800 Service Management System
Information about the central database for US toll free number management.
629 مشاهدات
٢٥ يناير ٢٠٢٥The Telephone Exchange Name Project
The historical relationship between North American telephone exchange names and numbers.
62 مشاهدات
٢٥ يناير ٢٠٢٥International Numbering Plans
A collection of all international numbering plans in the world. Some features require a paid subscr...
472 مشاهدات
٢٥ يناير ٢٠٢٥