I don't like to answer un-identified callers. But, I find my credit card company and verizon call un-identified, don't leave a message and then use it as an excuse...we tried to call you.
This one was over before I had a chance to even read the caller id. But, I received an email just after.
As Gryffyn said, this is BGE - if you're opting in to their summer savings program, they're calling to arrange the installation of the switch or thermostat.
To correct everyone, this number is from Honeywell, they are a monitoring service that keeps an eye on room temp and water detection. If your company has this type of coverage you will receive a call from this number letting you know about a potential problem. I made the mistake of relying on the above reports and missed the call.