01165 and +65 are used interchangeably to dial Singapore phone numbers from a mobile (more on the plus sign).
| Location | Dialing format | Or using + |
|---|---|---|
| Cell phone | 011 65 8xxx xxxx | +65 8xxx xxxx |
| Cell phone | 011 65 9xxx xxxx | +65 9xxx xxxx |
| VoIP | 011 65 3xxx xxxx | +65 3xxx xxxx |
| Landline, VoIP | 011 65 6xxx xxxx | +65 6xxx xxxx |