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MSAG Validation Database for locations Lists every address (actually an address range) in the area served by the local 9-1-1 system Maintained by the local 9-1-1 authority. Normally one MSAG per local authority (which often covers more than one PSAP), but there are exceptions Contains the ESN (code for ESZ) Indirectly specifies the PSAP to which the call is sent Implies the S/R (MSAG coverage doesn’t normally cross S/R service areas, but they do sometimes). |