This number called the office after I left for the day. Although there was no message, the caller ID matches that of prior calls that are robocalls trying to get businesses to switch their credit card processing company.

Other calls with caller ID "BETTER MERCHANT" we've received in 2016:
http://800notes.com/Phone.aspx/1-231-460-6076
http://800notes.com/Phone.aspx/1-308-365-6942
http://800notes.com/Phone.aspx/1-313-442-7328
http://800notes.com/Phone.aspx/1-419-930-6184
http://800notes.com/Phone.aspx/1-725-600-6334
http://800notes.com/Phone.aspx/1-828-548-6764
http://800notes.com/Phone.aspx/1-918-600-1962

We've also received one other robocall from Area Code 301 this year:
http://800notes.com/Phone.aspx/1-301-804-0151 (CID: ASHTON, MD) - Regarding business loans.