Add 6 Counties to Ireland WooCommerce

add_filter( 'woocommerce_states', 'custom_woocommerce_states' );
function custom_woocommerce_states( $states ) {
  $states['IE'] = array(
    'IE1' => 'Antrim',
    'IE2' => 'Armagh',
	'IE3' => 'Carlow',
	'IE4' => 'Cavan',
	'IE5' => 'Clare',
	'IE6' => 'Cork',
	'IE7' => 'Donegal',
    'IE8' => 'Down',
	'IE9' => 'Dublin',
	'IE10' => 'Fermanagh',
	'IE11' => 'Galway',
	'IE12' => 'Kerry',
	'IE13' => 'Kildare',
	'IE14' => 'Kilkenny',
	'IE15' => 'Laois',
	'IE16' => 'Leitrim',
	'IE17' => 'Limerick',
	'IE18' => 'Derry/Londonderry',
	'IE19' => 'Longford',
	'IE20' => 'Louth',
	'IE21' => 'Mayo',
	'IE22' => 'Meath',
	'IE23' => 'Monaghan',
	'IE24' => 'Offaly',
	'IE25' => 'Roscommon',
	'IE26' => 'Sligo',
	'IE27' => 'Tipperary',
	'IE28' => 'Tyrone',
	'IE29' => 'Waterford',
    'IE30' => 'Westmeath',
	'IE31' => 'Wexford',
	'IE32' => 'Wicklow',
  );
  return $states;
}