Postal code in the range of 11XXXX - 13XXXX ,24XXXX - 30XXXX, 56XXXX - 59XXXX
e.g. Orchard, River Valley, Mt Sophia,Bukit Timah, Tanglin, Holland Rd,Thomson, Marymount, Novena, Ang Mo Kio, Upper Thomson, Pandan Valley, Upper Bukit Timah, Bishan, Braddell