Have received multiple calls from this number on my cell phone.  Never leaves a message.

Tru Green

Tru Green Lawn Care

There was silence then whistling,  no message.

Funny the goof ball called my number then obvious did I not pay attention that my vm was recording him:
"Yeah I was just curious(how u got this job), I just got an email from career builder one day and now I am here"
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Be careful when dealing with someone on the other end of the phone especially if it's a number you do not recognize. While there was no harm/no foul on this call it just makes you wander about the level on service on the other end when the hiring standard are low and the person obviously was more involved in a person discussion than hearing a voice, in addition they could not leave a reason as to why they were calling