833-893-6644

This was the callback number given in a robocall message I received to my work cell phone, showing the number 650-577-0454 (although probably spoofed) at 6:30 a.m. this morning.  The robocall, with a somewhat chipper female voice, left the following message:

Robocaller wrote:

Hi there, this is to inform you that Spectrum has applied a 50% discount offer on your monthly bill, which is expiring today.
To keep the offer active, please call back at 833-893-6644 from 8 a.m. to 5 p.m. Pacific Standard Time.
Thank you and have a great day.

Definitely a scam, trying to catch unwary Spectrum customers.
For me the Red Flags were:
1. Call made 1 1/2 hours before legitimate telemarketing hours started.
2. I do not have a Spectrum account.
3. Even if I had a Spectrum account, I would not have given them my work cell number.
The recording was apparently made a while ago and not updated as most of the Country is currently observing Daylight Saving Time.