This is one of several numbers from the same prefix that have started coming into my phone.  Each of the numbers seems to be from a block of consecutive numbers, with only the last number changing.  I have not answered the calls, but since no voicemail is ever left, I have to assume that the automated calls are simply fishing for phones that get answered.  This is a common method for building and selling lists to scam robocallers.

I received a call from this number, rejected the call the first time, they called back immediately and I answered, it was a live person calling from "royal cruise" something or other from a "recorded line". I told them I don't know who you are but I haven't signed up for anything and do not call me again