"Martin Underwood" wrote in message
...
"Charlie Pearce" wrote in
message ...
On Fri, 31 Dec 2004 23:07:32 +0000, Clive Page
wrote:


Going off at a tangent, slightly, how are 07xxx mobile phone codes
allocated: did different networks (Vodafone, one2one etc) buy blocks of
codes and allocate from them, or are the numbers allocated completely at
random? In other words, for a given code (eg 07748) are all numbers with
that code connected via the same provider?


Numbers were assigned in blocks. I think that telcos got one or more 07xxx
codes, so each block would potentially contain 999,999 numbers.

However a few years ago (?about the same time that London went to 020)
mobile number portability was introduced - when you go from one mobile
operator to another you can take the number with you.

This is a similar position to fixed lines. There are time limits within
which the 'giving' telco has to pass all the necessary information to the
'receiving' telco, to enable them to take over the number.

regards

Stephen