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| Country | From abroad |
|---|---|
 Equatorial Guinea | +240 … |
| Area or operator | From abroad | Inside the country |
|---|---|---|
 Cumberland, MD · United States | +1 240 … | 1240 … |
| Frederick, MD · United States | +1 240 … | 1240 … |
| Gaithersburg, MD · United States | +1 240 … | 1240 … |
| 6 more in United States | ||
 Tulcea · Romania | +40 240 … | 0240 … |
 Ludvika-Smedjebacken · Sweden | +46 240 … | 0240 … |
 Apure/Barinas · Venezuela | +58 240 … | 0240 … |
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.