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Why was it necessary in the 1990s to allow area codes to include a middle digit other than 0 or 1?
Wiki User
∙ 11y ago
The change was necessary because we were just plain running out of telephone numbers. The tremendous growth of cellular phones, fax machines, and competing local telephone companies meant that many area codes needed to split or overlay, but we were up against the limit of the N0X/N1X area code format.
The US alone now has almost 300 geographic area codes, plus five toll-free codes and several other non-geographic codes, over 30 area codes in Canada, and 20 geographic area codes for areas that are neither US nor Canadian territory (island countries and territories in or near the Caribbean).
Under the original system of area codes, there were only 144 geographic codes possible, plus 8 special codes (700, 800, 900, etc.) and 8 short codes that were not available as area codes (411, 911, etc.).
When North America again runs low on available area codes, probably some time in the middle of this century or later, we will probably have to go to 4-digit area codes and 8-digit local numbers.
Wiki User
∙ 11y ago
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