The ancients, struck with this irreducibleness of the elements of human life to calculation, exalted Chance into a divinity; but that is to stay too long at the spark, which glitters truly at one point, but the universe is warm with the latency of the same fire.
A visitor location register (VLR) is a server in a cellular network that supports roaming functions for users outside the coverage area of their own HLR.
In general there is one central HLR per mobile network operator and one VLR per each Mobile Services Switching Centre (MSC) but this can vary according to the different vendor implementations. Capacity of HLR and VLR can directly affect the subscriber capacity of the mobile network operator.