Number overview
Multiple sites carry reports and warnings that 03-6740-2592 is used in a bogus-billing scheme: SMS messages reading, "The support center has an important matter to confirm. Please contact us today," lure recipients into calling back (as of 2026-08-03).
Reported tactics
- SMS messages create false urgency with phrases like "important matter to confirm" and "contact us today"
- The same content is sent from multiple phone numbers (including mobile numbers)
- A fraud-information site warns that calling back may lead to demands for money under pretexts such as unpaid charges
Legitimate service providers do not pressure you with "contact us today" by SMS. Don't comply with any unfamiliar billing demands.
How to handle this
Ignore the SMS
Don't reply to unfamiliar SMS messages and don't call back the number listed. You can safely delete the message.
If you've already called back
If you're asked for money, pay nothing and hang up. If you've already paid, contact the police and your consumer affairs center immediately.
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 with a fraud-warning label
- Fraudnavi (fraud-damage information site): a warning about fictitious-billing SMS such as "unpaid fees" and "legal action" baiting callbacks (April 2026)
- Number-lookup articles via Hatena Bookmark: reports of "support service" confirmation SMS
Where to report or get help
- Police consultation line: #9110
- Consumer Hotline: 188