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| Area or operator | From abroad | Inside the country |
|---|---|---|
 Austin, TX · United States | +1 512 … | 1512 … |
| Bastrop, TX · United States | +1 512 … | 1512 … |
| Bertram, TX · United States | +1 512 … | 1512 … |
| 22 more in United States | ||
 Suzhou, Jiangsu · China | +86 512 … | 0512 … |
 Kanpur, Uttar Pradesh · India | +91 512 … | 0512 … |
 Drachten · Netherlands | +31 512 … | 0512 … |
 Innsbruck · Austria | +43 512 … | 0512 … |
 Peqin · Albania | +355 512 … | 0512 … |
 Pelaihari · Indonesia | +62 512 … | 0512 … |
 Hatton, Nuwara Eliya · Sri Lanka | +94 512 … | 0512 … |
 Vara-Nossebro · Sweden | +46 512 … | 0512 … |
 MobiFone · Vietnam | +84 512 … | 0512 … |
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.