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X-XXX-XXX-XXXX format allows for 99,999,999,999 individual numbers, which is about 12.5 times the number of people on the planet, and there are other formats.
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Post says it all
In: 140
X-XXX-XXX-XXXX format allows for 99,999,999,999 individual numbers, which is about 12.5 times the number of people on the planet, and there are other formats.
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