Seems like an attempt from scammers. Caller ID says "Customer SRVC" but when I look up the number it shows up as the number for 2 separate (?) locksmith companies (24 Hours Emergency Locksmith in Stamford, CT and Armor Locksmith in Greenwich ,CT) . No message left, and I definitely didn't call for a locksmith.
Got a call from that number. They claimed to be able "to save me money on my utility bill."
At least they didn't claim to be calling from my home number (I've had that) or my cell phone (that, too). If a company is calling me and lying about who they are, my first assumption is that they're trying to commit fraud.