Who called from 2132322364

Received two calls this evening from 213-232-2364.  No one on the other end either time.  Don't know who, what it is.

I live in Hawaii and got calls 3 nights in a row.  Caller ID says "HI SPEC OLYM" I don't pick up from numbers I don't know. Left no message.

They called at 6:26 PM HST and after my second 'Hello' they asked for a "Mister Bradley". That is not my last name and I told them there was no Mister Bradley here. They apologized and hung up.

My call log shows calls from this number - at least two calls per week - every week in January, February and March 2009. The caller cuts off whenever I answer or whenever the answering machine picks up. Calls generally come in the early evening time and I have no idea who it is.

We get 6+ calls a day from this number.  The last time I answered there was no one on the other end and my phone was tied up for 20 minutes. That happened 3 times within 30 minutes. Does anyone know what this is?  Thanks