received four calls within a 10 minute time frame at about 3:30 EST.  I haven't signed up for this service, and no one in my household has signed up either.

This is telephone number is from WheresMyCellPhone.com.  It's a great web site for anyone who's misplaced their phone. Once you enter your telephone number, you will receive a call from them.

This is an automated call from "Where's My Cell Phone?".  Somebody who misplaces a mobile phone can enter the phone number on this site, and the site will phone that number; the idea being that the caller can then locate the phone by the ringtone.  

Unfortunately, anybody can go to the site and enter any phone number they wish, meaning that you could be getting calls  requested by somebody who's entering random numbers, who wants to harass you, or who entered the wrong number.  

If you get repeated calls from this number, and you aren't requesting them, contact them, and they'll add you to the blacklist so that requests to phone your number will be ignored.

I got 2 calls from 413-397-2057 , I had a toddler in the bath but was worried it might be my 84 yr old Mother- I do not appreciate this kind of monkey business.

Its a phone locator number.  If you Can't find your phone you dial it and it rings it so youbcan find it.