Article is as comprehensive as I've seen saying "...consolidate some aspects of AT&T operations in 10 major operational hubs in New York, California, Texas, New Jersey, Washington State, Colorado, Georgia, Illinois, Missouri, and Washington, DC." That's a lot of areas.
https://motherboard.vice.com/en_us/article/nepxeg/atandt-preps-for-new-layoffs-despite-billions-in-tax-breaks-and-regulatory-favors