I just got a call today from this number asking for Robert.  The caller had an accent which made it difficult to understand, but it was clearly not my name.  I said he must have a wrong number, so he asked for my name.  I would not give it out.  He then said he was with Farebuzz and needed to check my flight.  I told him I had no flight, and I added I didn't want a sales call.  He kept pursuing so I hung up.

While it may have been a legitimate phoine number error, alarms went off when he asked for my name before identifying himself.  At the very least it's not professional and it put me on my guard immediately.