Ever wanted to send me a free camera lens, some new Apple computer hardware or other gifts for free but didn't know my postcode? Well here's a service I didn't know existed until this morning, and I'm kicking myself for not finding it sooner.
If you go to this Singapore Post website page you can enter an address or a building and it will return the postcode. Sure enough, I entered 16 Balmoral Park which is where we live in Singapore and it returned 259847.
Given Singapore's tiny geographic size and densely concentrated population, their 6 digit postcodes are used not for suburbs (which Singapore really doesn't have many of) but for individual building complexes. It's a fantastic, elegant idea for so many reasons!