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libphonenumber
Google's common Java, C++ and JavaScript library for parsing, formatting, and validating international phone numbers.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
This makes the assumption that Twitter blocked it due to SMS fraud. While that's a plausible theory an equally plausible theory is that they were worried about account hijacking and security (and allowed twitter blue subscribers to continue to use it on a you can pay me to be stupid context) which seems equally plausible.
I take issue with a lot of the assumptions in the article but this is funny:
> Identify and block premium rate phone numbers, using libphonenumber. Whilst this seems promising, I don’t know how reliable the data and how effective this approach is.
here's this purpose-built and well maintained* library from google which does exactly what I want but i'm not even going to consider it.
* the actual number database has been updated 5x so far this year: https://github.com/google/libphonenumber/commits/master/meta...