Short answer
Singapore has 28 postal districts used for private property, grouped into the Core Central Region (CCR), Rest of Central Region (RCR) and Outside Central Region (OCR). HDB estates are organised into towns, classed as mature or non-mature.
† marks a figure we have not confirmed yet. Check the official source before relying on it.
Reference tables
Private
Districts D1 to D28
Areas, regions and what they mean for prices.
Open →HDBHDB towns
Mature vs non-mature estates.
Open →Neighbourhood guides
D18 · East
Tampines
Living and investing guide.
Read →D18 · EastPasir Ris
Where Coastal Cabana sits.
Read →More neighbourhood guides are coming †.