File:NPA 413 1975 TRG toll center location and tributaries.png

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Summary[edit]

Numbering Plan Area 413 with control switching points grouped my color codes for tributaries associated with their upstream toll center (in black).

Derived from data in AT&T Toll Traffice Routing Guides (1975), on map from Google Maps

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Date/TimeThumbnailDimensionsUserComment
current19:25, 31 August 2023Thumbnail for version as of 19:25, 31 August 20231,311 × 808 (934 KB)Kbrose (talk | contribs)improve boundary
23:26, 30 August 2023Thumbnail for version as of 23:26, 30 August 20231,074 × 808 (914 KB)Kbrose (talk | contribs)Numbering Plan Area 413 with control switching points grouped my color codes for tributaries associated with their upstream toll center (in black). Derived from data in AT&T Toll Traffice Routing Guides (1975), on map from Google Maps
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