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simfree
on July 24, 2021
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A database with 3.8B phone numbers from Clubhouse ...
The Local Routing Number provides this value in the USA, and multiple carriers (eg:Twilio) offer daily deactivation reports from the cellular carriers so you can tell which numbers are unroutable.
Scoundreller
on July 25, 2021
[–]
Canada isn't as progressive. Only telecoms can see which telecom a number points to and for the purpose of call-routing only.
Consider applying for YC's Spring batch! Applications are open till Feb 11.
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