Who is calling?

Who is calling from Alexandria MN?

After several seconds of dead air, they asked for someone who does not live here.

Pressed the big red BLOCK NOW button on my CPR Call Blocker, and I'll never hear from them again.

   Phone: 800-688-6337
   Fax: 617-884-8670
   Address: 100 Everett Avenue, Suite 6, Chelsea, MA 02150
   Email: mgt@deltamanagementassociates.com

Keeps calling. Haven't answered

We have gotten several calls from this number starting on Thursday 10/9/2014. Today I answered, they waited a few seconds and hung up.