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Denwa
Fiber-line salesHigh risk

0800-777-9017 phone number information

Basic Information

Number Type
Toll-free number (0800)

Number overview

0800-777-9017 is a toll-free number (the 0800 prefix, equivalent to Free Dial). Multiple reports describe calls from this number as sales pitches pushing a switch to a different internet fiber-line provider.

Reported behavior

Typical patterns reported for this number include:

  • The caller does not give a specific company name and uses vague openers like "a notice about line work" or "a notice about lowering your fees"
  • Attempts to extract details about your current contract or personal information
  • Pressure tactics such as "rates will go up unless you switch right now"
  • Phrasing that misleads listeners into thinking the caller is affiliated with NTT or a major ISP

The Ministry of Internal Affairs and Communications has communicated that solicitations for telecom services must clearly state the company name and contract details. Solicitations that hide the company name may violate the Act on Specified Commercial Transactions.

How to handle this call

Verify the company name and the purpose of the call

If you answer, first confirm the caller's company name, the representative's name, and the specific purpose. If you only get vague answers, the call is most likely a sales pitch.

Don't sign anything on the spot

Do not agree to any contract change over the phone. A legitimate provider will be willing to send a written explanation and give you time to consider.

Cooling-off rule

Phone-solicitation sales of telecom services are covered by Japan's initial contract cancellation rule (the equivalent of cooling-off). You can cancel the contract unconditionally within 8 days of receiving the contract document.

Where to report or get help

  • Consumer Hotline: 188
  • Ministry of Internal Affairs and Communications - Telecommunications Consumer Consultation Center: 03-5253-5900
  • Police consultation line: #9110

Frequently Asked Questions

What kind of call is 0800-777-9017?

It is widely reported as a sales call promoting a fiber-line switch. In many cases the caller does not identify the company.

How do I refuse a fiber-line solicitation call?

Say clearly that you are not interested and hang up. If the caller persists, block the number and consult the Consumer Hotline (188).

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