jessporter wrote on Dec 6^th, 2006 at 3:44pm:

I've joined your thread to the existing one on University of Surrey accommodation. Different things have been suggested but nobody has come back and said that they have found the number. If you do, please let us know how to work out your geographical number.

Firstly I suggest that you try dialling 173, see my post above and the one on Cambridge. Does it reveal a number?

Everyone says it's provided by NTL, so the 01483 numbers jrawle has posted in Reply #5 are really worth a try. I've listed the numbers with their change dates (this is probably the date they came into service) and put them in cronological order:

01483 82 07/94
01483 83 08/94
01483 85 10/94
01483 87 10/94
01483 59 08/95
01483 88 08/95
01483 84 01/99
01483 00 06/00
01483 68 01/01

If you try the 01483 00 prefix, you must always dial the area code, even when calling from a line within that area. It will probably not be able to be called from a BT line, although we have had reports that NTL lines and Orange mobiles do allow these national-dialling only numbers to be called.

The question is, can we eliminate any of these prefixes?

I've just found this page on the Janet web site. You will see that the presentation was on 14 June 2000 and there is a case study here on Surrey's accommodation. Although it doesn't say exactly when it was all up and running for, it does say, under the heading "What we wanted", service from 1st September 1999.

I think we can safely say that it definately won't be 01483 00 and 01483 68. I would also suggest that those earlier prefixes have probably been used up (hence the reason they acquire some more), so the most likely ones are those that were allocated in 1995 (01483 59 and 01483 88) and 01483 84 (01/99).

Try the prefixes followed by the last four digits of your internal extension number.