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| Area or operator | From abroad | Inside the country |
|---|---|---|
 Burlingame, CA · United States | +1 650 … | 1650 … |
| California · United States | +1 650 … | 1650 … |
| Daly City, CA · United States | +1 650 … | 1650 … |
| 12 more in United States | ||
 T-Mobile AT · Austria | +43 650 … | 0650 … |
 Sinabang · Indonesia | +62 650 … | 0650 … |
 Cubic · Liechtenstein | +423 650 … | 0650 … |
| Telecom Liechtenstein · Liechtenstein | +423 650 … | 0650 … |
 Hudiksvall · Sweden | +46 650 … | 0650 … |
If a number starts with +, the first 1–3 digits are the country code. If it starts with 0 (8 in Russia and Kazakhstan), it is a domestic number: an area or operator code follows, and from abroad the 0 or 8 is replaced with + and the country code. The same digits can mean different places, so where the call came from matters.