• 一番いちばん — number one / first / best
• 番号ばんごう — number / serial number
• 順番じゅんばん — order / sequence
• 交番こうばん — police box
• 当番とうばん — being on duty
• 留守番るすばん — house-sitting / answering machine

More examples ▼

• 番組ばんぐみ — TV or radio program
• 出番でばん — one's turn
• 順番待じゅんばんまち — waiting one's turn
• 番犬ばんけん — watchdog
• 番人ばんにん — guard / watchman
• 番線ばんせん — track number (at a station)

This kanji originally referred to guarding rice fields. Over time, it came to mean turns, assignments, or numbers in sequence — all tied to the idea of order and role.