FAKE! Got a vmail from this number. Guy does not identify company but says I've been a customer for 7 years and it's been so long since we spoke so please call me at 1-800-550-3611 x3722
UMM, we never spoke I don't know who you are and this is not a UPS number as some posts claim.
This is definitely a legitimate UPS phone number. That's not to say someone can't fake the caller ID though. My UPS rep calls me from this telephone number.
I work for UPS and while I can say this is a legitimate UPS number, however, I would be very leary of calls you receive from this number telling you there is suspicious activity with your UPS account. First, please do not ever give someone over the phone your user id and password to your account, ever. If you receive a call or message from this number claiming there is suspicious activity on your account you should not discuss it with them or call the number they leave in a message for you. The valid UPS customer service number to call is 1-800-742-5877 (1-800-PICK-UPS) and speak to a customer service rep.