Please input the 10-digit number starting from "0," "6," "7," "8" for the OCN number.
The number is written in the section of "お客様電話番号等 (customer's phone numbers)" on the bills or in the section of "ご請求番号 (billing number)" of "ご請求額お知らせメール (billing amount notification email)" that is sent by NTT Communications monthly. For more details, please contact the desk below.
NTT Communications billing customer center 0120-506-100 (working hours: 9:00 am to 5:00 pm closed on Saturdays, Sundays and public holidays, and during the year-end and New Year holidays)
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