noun
branch number; classification number
Used in administrative contexts such as land registration, document numbering, or organizational codes to indicate a sub-number or branch identifier appended to a main number.
登記簿の地番に枝番が付いている場合がある。
In the land registry, a lot number may have a branch number appended.
この書類の番号は、枝番まで正確に記入してください。
Please write the number on this document accurately, including the branch number.