The magazine is Electronic Design News, an electronics industry supplier advertising tabloid.  Callers are VERY slow to respond when you answer the telephone.

this number keeps calling our office and says nothing... i keep saying hello and they hang up

this number calls and everytime my answering machine picks up the number leaves a single beep then hangs up.

Caller asked to speak to one of the owners in regards to updating a magazine subscription.  She said she represented EDN.  We are not a subscriber to anything with that abbreviation.  Caller ID said wireless caller.  Beware.