Who called from 4842406400

Thought it was a robocall, but there was no recording, no one spoke at all. When I tried to call it back, I got a recording that it was not a working number.

Just got a call from 484-2406400. Gentleman said "sorry to trouble you, have a good day" and hung up. That was it?

got the same call 2/18 at 8:30pm and the same response as the rest of you. this has happened before. This is what whitepages.com shows:
(484) 240-6400Type: Land Line
Provider: Atx Telecommunications Services, Ltd
Location: Catasauqua, PA
Due to number portability, some numbers have been transferred to a new service provider.Type: Land Line
Provider: Atx Telecommunications Services, Ltd
Location: Catasauqua, PA

they asked me if I was a business or residence

Got voicemail on April 16, 2009. Just some breathing, no message.