# google/libphonenumber

Google's common Java, C++ and JavaScript library for parsing, formatting, and validating international phone numbers.

Repository: https://github.com/google/libphonenumber
Canonical: https://ross.abutalabs.com/products/libphonenumber
Language: C++
License: Apache-2.0
License Family: permissive
Last push: 2026-08-26T12:21:11+00:00

## Health v2 (maintenance only)
Score: 99/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 98, longevity 100
- inputs: {"age_days": 4291, "days_push": 7, "days_rel": 19, "gap_med": 13.5, "n_releases_24m": 49}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 18232, forks 2172 (observed 2026-08-28T04:11:26.477506+00:00)

## What it is
Google's multi-language (Java, C++, JavaScript) library for parsing, formatting, and validating international phone numbers for all countries and regions. It also provides number-type detection, matching, geocoding, carrier, and timezone lookup for phone numbers.

## Use cases
- validate international phone numbers in a signup form
- format phone numbers as users type
- parse user-entered phone numbers into E.164
- detect whether a phone number is mobile or landline
- find phone numbers inside free text
- get carrier or timezone info for a phone number

## When to choose
- you need reliable, globally comprehensive phone number parsing and validation
- you want as-you-type formatting in a UI
- you need metadata-backed number type, geocoding, or carrier lookup

## When to avoid
- you only handle numbers from a single country with simple rules
- you need real-time line status or number portability data
- your platform lacks Java, C++, or JavaScript support and no port exists

## Facets
- artifact type: library
- maturity: stable
- function: parser, serialization, internationalization, developer-tools
- domain: developer-tools, web-development, mobile-development
- platform: jvm, cpp, cross-platform
- tags: phone-numbers, validation, formatting, e164, geocoding, carrier-lookup, localization, javascript, android

## Member repositories
- google/libphonenumber (main) score 99

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:26.477506+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:02:06.588172+00:00, confidence not recorded.
  - readme: https://github.com/google/libphonenumber (fetched 2026-08-28T04:11:26.477506+00:00, sha eb4561b0fb5a)
- Data as of 2026-08-30T08:39:29.467469+00:00.