Numbering Allocation Today, each facilities based Service Provider obtains at least one 10,000 block of numbers to serve a Rate Center, even if they only have 10 customers.
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847-391-0000 - 9999
847-621-0000-9999
847-545-0000-9999
847-463-0000-9999
Service Provider A
Service Provider D
Service Provider C
Service Provider B
Rate Center 1
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