Quote:
Originally Posted by pip5678
As a matter of interest the STD director codes, apart from 01 for London, were in alphabetical order for Birmingham, Edinburgh, Glasgow, Liverpool and Manchester as 021, 031, 041, 051 and 061 respectively.The initial city letters correspond to the numeral on an alpha-numeric dial.
They would be followed by a local 3 digit code often derived from the name of the local exchange in a similar way from a dial. Example 0161-624 2211 for Manchester, Main (Oldham); MAI being represented as 624
Then the 4 digit "subscriber's" number - many of you will know the significance of 2211.
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And Altrincham was 061-928, Blackfriar 061-834, GPO 061-863 and plenty more examples! The first the digits taken from the exchange name was only applicable before 'sectorisation' took place in Manchester around 1967. Some codes didn't change but most did if they ended up in a different 'numerical' zone to their original letter.