Sample of permits pulled for AT&T's Nashville Main Central Office at 185 2nd Ave N in Nashville (not the Batman building). It's got a 7th floor data center:

4/29/2019 INSTALL 6 XDH AND 2 XDP LIEBERT/VERTIV COOLING UNITS TO 7TH FLOOR [Liebert® XDH™ Horizontal Row Cooler provides efficient and economical cooling for high heat density equipment]

8/30/2018 INSTALL 4 EIGHT TON HORIZONTAL XDH LIEBERT UNITS ON 7TH FLOOR.

7/6/2011 INSTALL (2) 60 TON AHU AND 8 VARIABLE FLOW SPLIT SYSTEMS AND POINT OF SERVICE MODULAR AHUS ALONG WITH CHILLED WATER COILS. THESE UNITS ARE FOR COOLING ONLY–NO HEAT. REHAB 7TH FLOOR OF AT&T BLDG FOR INSTALLATION OF TELECOMMUNICATIONS EQUIPMENT.

https://maps.nashville.gov/ParcelViewer

211 Commerce St, Nashville that Codemonkey tweeted about vXchnge has a datacenter there. It was a portfolio company of The Stephens Group from Little Rock, AR. Officer was Ronald M. Clark. He previously worked for the Rose Law Firm. Rose Law Firm - Clinton & Whitewater.

http://search.sunbiz.org/Inquiry/CorporationSearch/ConvertTiffToPDF?storagePath=COR%5C2013%5C1108%5C52709127.Tif&documentNumber=M13000006985