<label for="telephone">
        <input type="tel" id="telephone"/>
    </label>

var LocalNetworks = [
    Network1 = ['011','012','013','014'],
    Network2 =['021','022','023','024'],
    Network3 = ['031','032','033','034']
];

var LocalNetworks = [
  ['Network 1','Network 2','Network 3'],  // names of the networks
  [
    ['011','012','013','014'], // Network 1 numbers
    ['021','022','023','024'], // Network 2 numbers
    ['031','032','033','034']  // Network 3 numbers
  ]
];

var index = 0;
for(var i in LocalNetworks[1]){
   j = LocalNetworks[1][i];
  if(j.indexOf(user_entered_number) !== -1){
      index = i;
  }
}

LocalNetworks[0][index];

var LocalNetworks = [
Network1 = ['011', '012', '013', '014'],
Network2 = ['021', '022', '023', '024'],
Network3 = ['031', '032', '033', '034']];

$(':input[type=text]').keyup(function () {
    $('#network').html('');
    $val = $(this).val().substring(0,3);
        $.each(LocalNetworks, function (ind, val) {
            if($.inArray($val, val) > -1){
                $('#network').html('Network' + (ind + 1));
            }
        });
});