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How to call Germany: country code, area codes, phone number …
Oldenburg in Oldenburg Dialling Code, Prefix, Oldenburg in Oldenburg …
List of dialling codes in Germany - Wikipedia
Area Code of Oldenburg, Germany | Oldenburg Telephone Dialing Code
Telephone numbers in Germany - Wikipedia
List of country calling codes - Wikipedia
Country Codes, Phone Codes, Dialing Codes, Telephone Codes, …
0441 Dialling Code, Phone Code 0441
Oldenburg (city) - Simple English Wikipedia, the free encyclopedia
What is the area code for Oldenburg (Oldb)?
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