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File:NANP312(Chicago)1952.jpg

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NANP312(Chicago)1952.jpg (204 × 204 pixels, file size: 26 KB, MIME type: image/jpeg)

Summary

Description
English: Area code 312, as of 1952
Date
Source
image extraction process
This file has been extracted from another file
: The Bell System technical journal 1952 Area Code map of USA.jpg
original file
Author American Telephone and Telegraph Company
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(Reusing this file)		 At the time of upload, the image license was automatically confirmed using the Flickr API. For more information see Flickr API detail.

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Date/TimeThumbnailDimensionsUserComment
current17:44, 28 June 2018Thumbnail for version as of 17:44, 28 June 2018204 × 204 (26 KB)Tuvalkinrecropped to include both toponyms; off-area toponyms removed; all area codes added
17:33, 28 June 2018Thumbnail for version as of 17:33, 28 June 2018155 × 242 (16 KB)TuvalkinFile:The Bell System technical journal (1922) (14570186909).jpg cropped 95 % horizontally, 84 % vertically using CropTool with lossless mode.

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