The phone number 855-330-8653 is associated with Microsoft and is used for Multi-Factor Authentication (MFA) phone calls. When users sign in to Microsoft services and choose the “call me” option for MFA, they receive a call from this number.
During the call, an automated voice instructs the user to press the pound (#) key to complete the verification process. These calls are legitimate and are part of Microsoft’s account security procedures to confirm a user’s identity.
There have been reports of users receiving these calls as part of MFA verification, and some users on certain networks have experienced issues receiving these calls due to network restrictions. Additionally, some users have reported multiple verification calls, sometimes unexpectedly, which may suggest someone else is trying to access their Microsoft account or it could be related to MFA setup or usage.
So, if 855-330-8653 calls, it typically relates to Microsoft MFA services for account verification purposes.
What to do if I receive unexpected Microsoft MFA calls
If unexpected Microsoft MFA calls are received, here are the recommended steps to take:
Do not approve or respond to any MFA requests or codes that were not initiated by you.
Immediately review recent sign-in activity on your Microsoft account to check for any suspicious or unauthorized attempts.
Change your account password to a strong, unique password.
Consider changing or updating your MFA method, for example switching to an authenticator app or hardware token for added security.
Contact your organization’s IT help desk or Microsoft support to report the issue and get assistance.
Monitor your account for any unusual activity or login attempts continuously.
Avoid clicking links in any suspicious messages or emails claiming to be related to the MFA call.
If using third-party security apps, ensure they are not blocking legitimate MFA messages, or disable them temporarily to test.
Taking these steps helps protect your Microsoft account from unauthorized access and keeps your personal information secure.
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How to confirm MFA attempts on my Microsoft account
To confirm Multi-Factor Authentication (MFA) attempts on a Microsoft account, follow these steps:
Sign in to your Microsoft account at https://account.microsoft.com/.
Go to the “Security” section from the top menu.
Scroll down and click on “View my sign-in activity.“
You may be asked to verify your identity using email, phone, or an authenticator app.
After verification, you will see a list of recent sign-in attempts with details such as date, time, device, location, and method of access.
Review the sign-in attempts carefully. You can expand each entry to see more information like the IP address and device type.
If you see any unusual or unauthorized activities, mark them as “This wasn’t me” to notify Microsoft.
Secure your account immediately by changing your password and updating security settings if suspicious activity is detected.
This recent activity page helps monitor and protect your account by providing visibility into all recent sign-in attempts, including MFA challenges
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