Usual nonsense where they phone and just hang up (twice in a row). I have to assume it's yet another telemarketer calling to sell me someone, lord forbid they would honour the 'Do Not Call' lists.  Here's the reverse look-up info, not that it helps much:

Tel. (802)383-0658
Type: Land Line
Provider: Lightship Telecom, Llc
Location: Burlington, VT