• BOSsuet, CHÉNier and GOUnod exchanges opened in 1964 after the changeover to all-figure numbers, although some subscribers had already printed letterheadings and other material with their new number in letter-code form.
• Names shown in italics indicate exchanges outside Paris proper (la banlieue parisenne, Zone Péripherique). Some exchanges served both city and suburbs.
• Codes and exchange names shown 'listed' in a certain year refer to the official telephone directory of that year.

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