011 is not a country code. Numbers inside a country start like this: Yerevan (Armenia), New Delhi (India), Belgrade (Serbia), Alumínio - SP (Brazil) and others. The first digit 0 is the trunk prefix for domestic calls and is dropped from abroad.
Have the full number? Check it in the number lookup.
| Area or operator | From abroad | Inside the country |
|---|---|---|
 Yerevan · Armenia | +374 11 … | 011 … |
 New Delhi · India | +91 11 … | 011 … |
 Belgrade · Serbia | +381 11 … | 011 … |
 Alumínio - SP · Brazil | +55 11 … | 011 … |
| Araçariguama - SP · Brazil | +55 11 … | 011 … |
| Arujá - SP · Brazil | +55 11 … | 011 … |
| 70 more in Brazil | ||
 Buenos Aires · Argentina | +54 11 … | 011 … |
 Hasselt · Belgium | +32 11 … | 011 … |
 Cellcard · Cambodia | +855 11 … | 011 … |
 Etisalat · Egypt | +20 11 … | 011 … |
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.