GPS Dog Collar That Can Be Accessed From A Computer?

Does anyone know of a GPS dog tracking collar that can be accessed from a computer? I have looked at several on the internet, but all of them require a handheld unit, which would be ok, except for the fact that they are limited to line-of-sight transmission. They can only broadcast for, at most, 7 miles. I want to be able to log into my computer and see where my dog is at all times. If he runs out of the transmission range of the handheld unit, then its useless. Any ideas? Thanks in advance.