This is some information I found when searching for the number through my search bar: - MCI is a verizon company.
Name and Address of the owner
Phone number: 210-280-0075
is located in San Antonio, Texas.
Its exchange 280 is managed by MCI METRO ATS, INC. - TX.
The number is currently on switch number SNANTX39DS0 (switch is a technical specification for phone hobbyists) .
Around 100% of people reported it as "Unknown"
You are the 3rd person to search for it here. The number has a total of 1 complaints filed against it.