Who called from 4155083268

My phone rang once

Caller keeps calling at least 4 or more times a week caller id indicates a number (415)508-3268 with name of NEXTIX-TEST L did a reverse look up and found that caller was from San Francisco unavailable name must be on a PBX line that is shared with a company multiplexed line system and comes up as a private inner company line on caller ID. some companies use line spoofing so you cant track them down and the number could be arronious in nature.The only true way to track them is with professional phone company test gear and they could ping the line to measure coordinates of its origin.

It is a telemarketing company. They called for renewal confirmation of an industry magazine subscription that we receive. At least, that is my experience

They just called me yet AGAIN. 3rd time today.

Only this time, someone actually responded when I said "Hello?"

Asked for someone named "mumble-something Willams".

Told them that there's no one here by that name (there isn't), then he proceed to hang up.

Got calls from this number several times on my mobile phone in the past few days.  I never answered because I didn't recognize the number.  
Tried to call the number (1-415-508-3268) back a few times from a land line and got "Your call can not be completed due to network error".