This is a scam. Do not answer.

This Palo Alto, CA area number left no message.  When I called back twice it rang, was immediately answered, then shunted to a very loud busy signal.  Seems bogus

Received call on my office number.  I did not answer and they did not leave voicemail.  Suspect it's a telemarketer.

Telemarketer.  Did not leave voicemail.

Same experience like most of you...but the interesting part was the caller was a lady calling my cellphone, probably of Indian origin and looking for a different person other than me. She seems to have my first name correct and picked a very common last name which makes me think this company is verifying a calling list.....sounds scary!!

Esther from A10, calling on behalf of her boss Caroline Taylor.  Esther had no idea why her boss was calling and was clueless (not to mention talked ridiculously loud).  I get a lot of similar calls (assistant calling for boss, doesn't know anything, etc) from other numbers but same area code.  I suspect it's telemarkers.

Received a missed call from this number with no message.

Got a call from this number.  Caller did not leave a message.  Tried to return call but it just rings then changes to a busy signal, no voice mail

Called but did not leave a message

Am getting calls from this number and numbers similar. I advise to ignore in case there are large charges for answering the call.

Caller will not say what the call is in reference to.   Will "call back".  Person she asked for is no longer with the company.

Keeps calling looking for people no longer with the company.  Foreigner.

Received a call from this number while was talking on other line.