I'd like to know the remote host string for the major mobile 'phone
networks in the uk.

For example, a multimedia mobile 'phone on the Orange UK network
accessing a WML website will provide the following string to perl, in
the $ENV{'REMOTE_HOST'} server environment variable:

future-is.orange.co.uk

--- Central part of the question ----
I'd like to know what that string is, for the other networks i.e.
Vodafone, O2, T-Mobile, & any other major ones.
-------------------------------------

What I'm trying to do, for illustrative purposes:

Use the $ENV{'REMOTE_HOST'} variable in perl, to separate mobile
'phone visitors in the UK from mobile 'phone visitors outside the UK,
to determine whether to serve an actual contact 'phone number, or
whether to provide a message indicating areas outside the UK are not
served by the service in question.

Here's some sample perl to illustrate:

#!/usr/bin/perl

print "Content-type: text/vnd.wap.WML\n\n";


print "<?xml version='1.0'?>\n";
print "<!DOCTYPE wml PUBLIC '-//WAPFORUM//DTD WML 1.1//EN'\n";
print "'http://www.wapforum.org/DTD/wml_1.1.xml'>\n";
print "<wml>\n";
print "<card id='card1' title='Our WAP site'>\n";

print "<p align='center'>\n";
print "site content etc\n";
print "</p>\n";


if ($ENV{'REMOTE_HOST'} eq 'future-is.orange.co.uk')
   {
   print "<p align='center'>\n<br/>\nTel: 01234 567
890\n<br/>\n</p>\n";
   }
   else
   {
   print "<p align='center'>\n<br/>\nSorry, area not
served\n<br/>\n</p>\n";
   }


print "<p align='center'>\n";
print "_,.-=^v^v^=-.,_\n";
print "</p>\n";

print "<p>\n";
print "<a href='../cgi-bin/covered.pl'>Area covered</a><br/>\n";
print "<a href='../cgi-bin/contact.pl'>Contact me</a><br/>\n";
print "</p>\n";

print "</card>\n";
print "</wml>\n";