Number overview
0800-500-0291 is a toll-free number (the 0800 prefix). Calls from this number are reported as sales pitches promoting a switch to a different fiber-line provider.
Reported behavior
- Pitches such as "your line will be faster than the current one" or "your monthly bill will go down"
- Pushes you to switch to a specific ISP
- Tries to extract details about your current contract over the phone
The Consumer Affairs Agency has warned that trouble around fiber-line phone solicitations is increasing. The "it will be cheaper" pitch often comes with hidden conditions, and cancellation fees may apply.
How to handle this call
If you are not interested, say so clearly and hang up. Don't share your current contract details or personal information. If you do end up signing, you can use the initial contract cancellation rule within 8 days.
Sources of the reports
The descriptions on this page are based on user reports posted to third-party phone-number directories (checked as of 2026-08-03). This site has not independently verified the caller, and nothing here identifies the caller definitively. The reporting sources we checked are:
- jpnumber: registered as fiber-line switch sales (self-described agency)
- Number-lookup articles via Hatena Bookmark: reports of line-contract sales such as Docomo Hikari
- X: posts describing solicitations in the name of NURO Hikari and others
Where to report or get help
- Consumer Hotline: 188
- Ministry of Internal Affairs and Communications - Telecommunications Consumer Consultation Center: 03-5253-5900