* [yup-phone v2.0.0](https://github.com/abhisekp/yup-phone) – Yup-based phone number validation using libphonenumber-js, supporting region-aware parsing, strict rules, and detailed digit-length checks.

* [phonenumber v0.1.13](https://github.com/dongri/phonenumber) – Go library that normalizes mobile and landline phone numbers into E.164 format and can infer ISO3166 country information.