Got 8 calls in one day from this number, including midnight and 7:30 am. Didn't answer any of them, but before the first call, I had a msg on my cell sying that they were calling from a doctor's office about a patient (at 7:30 am)...right. I just figured it was a wrong number until I got repeated calls right after that during the same day (left no msg) from a phone number with the same first 3 digits -- being this 454-6100. I assumed they were related "wrong number" calls but was baffled by the times of day that I was called,... some calls made one minute back to back.
It is the root # for the St. Louis Childrens Hospital switchboard. If you recieved a call from this #, they were calling from a phone that is routed through the hospital.