Before zip code was changed to be a 7-digit number, its common post office was transferred from Yokkaichi-Nishi Post Office to Nara Central Post Office, and its zip code turned out to be the number that begins with 630, which indicates it belongs to Nara Prefecture.
7桁化に際して普通郵便局が四日市西郵便局から奈良中央郵便局へ移管され奈良県側の630～となった。