I don't remember if I've received calls from this number in the past, but what was so notable about today is that I got one call right after the other over a period of 5 minutes.  I Googled it, and nothing helpful came up.  There was no caller i.d. other than the phone number.  I just did a reverse lookup on whitepages.com, and it says it's flagged as spam and is a possible telemarketer.  It said Bandwidth SMSEnabled VoIP.