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| Area or operator | From abroad | Inside the country |
|---|---|---|
 Houston, TX · United States | +1 713 … | 1713 … |
| Louisiana Street, Houston, TX · United States | +1 713 … | 1713 … |
| Pasadena, TX · United States | +1 713 … | 1713 … |
| 2 more in United States | ||
 Huanggang, Hubei · China | +86 713 … | 0713 … |
 Prabumulih/Talang Ubi · Indonesia | +62 713 … | 0713 … |
 Orange · Romania | +40 713 … | 0713 … |
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.