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Wow, $0.005 is incredibly expensive for carrier lookups. I run an SMS gateway and our cost for this is $0.0001 per lookup from our primary provider and $0.0002 from our backup provider. Of course we are dealing in bulk but Twilio should be too...

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Twilio is great for small scale applications, but as you point out they're very expensive if you're doing anything at scale.

The lowest I've found out there for bulk is $0.002, not $0.0001; what service do you use? I'd owe you a few beers if that's not a typo

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