What are phone numbers starting with "0800"?
Phone numbers starting with "0800" are toll-free numbers.
These are used not only by KDDI, but also by other telecommunication companies.
Important note
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Please be cautious, as nuisance calls pretending to be from companies are increasing.
You can check the phone number you are currently using with KDDI on the following page.
For your reference
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A toll-free number is a telephone number service that starts with "0080" or "0120" and can be used free of call charges.
The calling charges are borne by the business that has contracted the phone number.
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If you receive a suspicious email or SMS message claiming to be from KDDI, au, or UQ mobile, please refer to the page below for instructions on what to do.
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