Number overview
Information about 050-3801-3651 is mixed. Phone-number directories register it as a Rakuten Card fraud-detection SMS sender, while some security articles list it in a warning context about scam SMS (both as of 2026-08-03).
The caller number officially published in Rakuten Card's FAQ is 050-3801-3600; we could not confirm any official listing of this exact number (3651). It may be another line of the same platform, but this site does not identify the sender definitively.
This page previously claimed the number was abused to relay two-factor authentication codes; re-verification found no support for that claim, so it was corrected.
Reported behavior
- SMS about Rakuten Card fraud detection and usage confirmation
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:
- Telnavi: registered as Rakuten Card
- Number-lookup articles via Hatena Bookmark: reports of Rakuten Card fraud-detection SMS
- Rakuten Card official FAQ: only 050-3801-3600 is published (this number is not listed)
Care when you receive such SMS
SMS in a card company's name can be genuine or phishing. Do not open links; check your usage directly in the official Rakuten Card app or member site (Rakuten e-NAVI). Treat requests for card numbers or PINs as fraud.
Where to report or get help
- Police consultation line: #9110
- Consumer Hotline: 188