In article
,
D7666 writes
To a certain extent NTL (or rather whoever they call themsevles this
week ex NTL) already works like that - its actual exchanges are not
necessariliy physically located in the ''area codes'' that they serve.

The same is true for BT. The Cambridge exchanges (DLEs) serve numbers in
Ely, Newmarket, and Bury St. Edmunds among others. There are many, many
area codes in northern Scotland, but the five northernmost exchange
sites are Perth, Dundee, Aberdeen, Inverness, and Lerwick.

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