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What is the maximum number of telephone numbers that can be used under a single three-digit area code?
Wiki User
∙ 12y ago
Theoretically, about 7.9 million.
The first digit of a local phone number in North America (country code +1 = USA, Canada, etc.) cannot be 0 or 1. The first three digits cannot coincide with short codes like 911 and 411, and usually cannot coincide with the area code or any adjacent area code.
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoIf you use a 3-digit area code - the maximum number of codes is 1,000 - The maximum of individual subscribers depends on how many digits you assign to a subscriber's number !
The american numbering system of 123-4567 allows for up to 10,000 subscribers per area code - a country-wide total of 10,000,000 numbers.
In the UK, we have a total of 11 digits in our numbers (including the area code) giving a theoretical maximum of 100,000,000 numbers !
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