Area 1 : Dobong-gu, Gangbuk-gu, Seongbuk-gu, Nowon-gu.
Area 1 encompasses the following districts: Dobong-gu, Gangbuk-gu, Seongbuk-gu, and Nowon-gu.

This paraphrases the original list by reorganizing it into a more structured format while maintaining the same meaning.