I was kind of bored one day and a better part of my curiosity lead me IDA website to find out about the number assignment for handphone. I was also tired of asking friends which telco’s service they are using so I can use the Internet SMS services. Singtel and Starhub provide free Interenet SMS services, while M1 requires its users to register. After blindly clicking through the site, I landed on National Numbering Plan page. Under Annex 3F, there is the comprehensive number blocks assignment. Here is Annex3F. The list may not be accurate as now IDA allows mobile subscribers to change telco, bringing along their numbers for just a nominal fee.