When the Keihanna Line started operation, a serial number was assigned to each station, including those on the Osaka Municipal Subway Chuo Line (also including the stations in the portion corresponding to the former Higashi-Osaka Line).
けいはんな線の開業と同時に、大阪市営地下鉄中央線と通しの駅ナンバリングが（旧東大阪線区間も含めて）割り当てられている。