Quoth Javarod
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1= country code
775= area code (in this case Northwest Nevada, most states have multiple codes, some larger cities have multiple codes as well)
853= prefix (this indicates both the provider and the region within the area code, in this case ATT landline service in southwest Reno, as another example 530 would be Verizon Wireless service based in Washoe County).
7272= subscriber (in this case Papa Murphy's take-n-bake pizza)
The system actually works fairly well, as long as we don't run out of combinations for area codes we are in good shape... we may have to occasionally change numbers as further subdivision is required, but we won't be running out soon (there is 8billion different combinations that can be made with 10 digits).
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