Why does my phone say i called 611 when i didn't?

I was going through my call log, and it says on june 3 at 12:42 pm, i called the number 611 for 34 minutes. I never called this number, what is it? Why does my phone say i called it? If it helps, i have an iPhone 5s and use at&t.

611 is the abbreviated dialling telephone number used to report a problem with telephone service.

611 is a shortcut to AT&T customer support. (only if your phone is on AT&T's network.)

611 is customer service
https://gethuman.com/phone-number/AT-T-Wireless/customer-service/~2708

Possible case of but dial?