Tonga
Oceania · 17 specs
Direct Answer
Tonga (TO / TON / 776) operates on a 240 V / 50 Hz electrical grid using Type I sockets. Traffic drives on the left (LHT). The official currency is the Tongan Paʻanga (TOP, T$), country calling code is +676 (exit code 00), emergency dispatch is 911 (Police: 922), and paper standard is ISO 216 A4.
Source: Tonga Power Limited (TPL) / Ministry of Infrastructure / ISO 3166-1 · Last reviewed Aug 28, 2026
Specs
| Official English Name | Kingdom of Tonga ISO 3166-1 |
| Local Endonym | Puleʻanga Fakatuʻi ʻo Tonga |
| ISO 3166-1 Alpha-2 | TO |
| ISO 3166-1 Alpha-3 | TON |
| ISO 3166-1 Numeric / UN M49 | 776 UN M49 (Code 009) |
| Country Calling Code | +676 ITU-T E.164 |
| International Exit Code (IDD) | 00 dial prefix for international calls |
| Internet ccTLD | .to Tonic Registry |
| Vehicle Registration Code | TON UNECE Standard |
| National Currency (ISO 4217) | Tongan Paʻanga (TOP, T$) 100 Seniti |
| Mains Electricity Standard | 240 V, 50 Hz Tonga Power Limited (TPL) |
| Electrical Plug Sockets | Type I (AS/NZS 3112 standard) 10 A / 240 V |
| Road Traffic Driving Side | Left-Hand Traffic (LHT / RHD) Tonga Traffic Act |
| Primary Measurement System | Metric (SI) National standard |
| Standard Office Paper Format | ISO 216 A4 (210 × 297 mm) Standard |
| Consolidated Emergency Number | 911 (Ambulance: 933, Police: 922, Fire: 999) Direct Service Dispatch |
| Primary Time Zone | UTC+13 (TOT) No DST observed |
Electrical Grid, Voltage & Plug Compatibility
- Nominal Grid Parameters: Operates on a single-phase standard of 240 V, 50 Hz.
- Plug & Socket Hardware: Type I (AS/NZS 3112 standard). Uses Type I inverted V-prong sockets (compatible with Australian/New Zealand or Chinese/Argentine configurations).
- International Traveler Guidance: Devices operating on 100–240 V (smartphones, laptops) require only a mechanical pin adapter. Single-voltage appliances from differing voltage regions require a certified step-down/step-up power transformer.
Telecommunications, Dialing & Emergency Dispatch
- International Dialing: The country calling code is +676. Outbound international calls from within the country require dial prefix 00 followed by the destination country code.
- Emergency Dispatch: Consolidated emergency services are reached at 911 (Ambulance: 933, Police: 922, Fire: 999). Calls are automatically routed to local public safety answering points with emergency vehicle dispatch.
Transportation, Driving Standards & Road Regulations
- Traffic Flow: Road traffic drives on the left (LHT) with Right-Hand Drive (RHD) vehicles.
- Standard Speed Limits: General regulatory speed limits default to 50 km/h (31 mph) in built-up urban and residential zones, 80–100 km/h (50–62 mph) on undivided rural roads, and 110–130 km/h (68–81 mph) on grade-separated divided motorways/expressways (unless lower local limits are posted).
- Safety Requirements: Mandatory seatbelt compliance for all occupants, zero-distraction handheld mobile phone bans while driving, and mandatory in-vehicle warning triangles.
Commerce, Currency & Document Standards
- Official Currency: Legal tender is the Tongan Paʻanga (TOP, T$).
- Document & Paper Standards: Standard office printing, official government gazettes, and legal filings strictly utilize ISO 216 A4 (210 × 297 mm). Standard business correspondence pairs with standard business envelopes.
- National Time Zone: Regulated under UTC+13 (TOT).
Postal Addressing & Administrative Divisions
- Postal Architecture: Postal delivery utilizes Standard postal system.
- Standard Address Format: Structured in standardized hierarchy: Recipient Name → Street Address / Building Unit → Postal Code + City/Town → Province/State → Kingdom of Tonga.