According to internet search GCR LLP is a law group in Glendale CA but this number is not from that area. This number showing GCR LLP on ID called my home phone at 4:17 PM 7/5/2017. If this was about something important I have no Idea as caller left no message making this call appear to be a scam!

Got a call showing as from Huntington Beach, also 7/5. No message. Blocking this one.

7/05/2017.  GCR LLP  No message.  Blocked

I called the # back.  It was a recording that said "thank you for calling your heating, air........   I hung up.

Get calls from this number occasionally but no message is ever left.  If they don't leave a message, I assume it's robocall or some local guy trying to sell me something I don't need or want.