0551 is not a country code. Numbers inside a country start like this: MagtiCom (Georgia), Turk Telekom (Türkiye), Göttingen (Germany), Hefei, Anhui (China) 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 |
|---|---|---|
 MagtiCom · Georgia | +995 551 … | 0551 … |
 Turk Telekom · Türkiye | +90 551 … | 0551 … |
 Göttingen · Germany | +49 551 … | 0551 … |
 Hefei, Anhui · China | +86 551 … | 0551 … |
| Hefei/Chaohu, Anhui · China | +86 551 … | 0551 … |
 Gorakhpur, Uttar Pradesh · India | +91 551 … | 0551 … |
 Ooredoo · Algeria | +213 551 … | 0551 … |
 Nilphamari/Domar · Bangladesh | +880 551 … | 0551 … |
 Tarakan · Indonesia | +62 551 … | 0551 … |
 Nirasaki, Yamanashi · Japan | +81 551 … | 0551 … |
 Gullspång · Sweden | +46 551 … | 0551 … |
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.