It's cps energy doing a test.

Just received a call from that number. I imagined it could be CPS Energy, but nobody answered.  I guess it was because I took too long to answer -trying to figure out who it might be.  No message, either. My bill is paid, so I wonder what the call was for.

I called CPS.
They are testing their new alert system by calling
the home or cell numbers of customers.
The new system will notify folks of upcoming service outages.

CPS Energy of San Antonio Texas.  Power outage notification system.  I signed up for notice. No voice msg was left, but at the same time, I got an email mag stating that electrical power was restored at my address.

I have always found those calls to be less than edifying ...

Examples:

Lights go out, A/C dies, computers go on backup power, emergency lights go ON.
-- a half hour later, CPS calls, and tells me the power is out.

Eventually, the lights come back on, the A/C starts again, and  computer backup power supplies stop beeping, and the emergency lights go back to charging.
-- 15 minutes later, CPS calls, and states the power outage will be fixed in a half hour.

In the interim between outage and restoration, any calls to CPS are answered by a recording, that essentially says, "lots of other people called, and we are working on it".

I really do not want to denigrate CPS too much though.  They do a pretty good job of supplying power to my area (which is near the end of their main lines, and seems to be subject to a lot of transformer blowouts and lightning hits).  They probably have to make a LOT of calls to tell us the power is down (or up, as the case may be).

Information from https://www.cpsenergy.com/en/customer-support ... rgy-alerts.html

"Alerts are sent via phone, email and text between 9 a.m. and 6 p.m. No phone calls will be made from 6 p.m. to 9 a.m. -- only email and text messages will be sent. All messages issued via phone will have a caller ID of (210) 353-2111."