Data Sources

ProxyEarth is built on trusted, open, and publicly available data sources. We believe in full transparency about where our data comes from.

Transparency commitment: We only use publicly available data sources. We do not purchase private subscriber records, access carrier systems, or use data obtained through unauthorised means. All sources listed below are publicly documented.

Google libphonenumber

Open Source Primary Source

The industry-standard open-source library for parsing, formatting, and validating international phone numbers. Originally developed by Google and maintained by a global community of contributors. Used by Android, Chrome, and thousands of applications worldwide.

What it provides: Number validation, E.164 formatting, national formatting, international formatting, line type detection (mobile/fixed/VoIP/etc.), and country identification from a number prefix.

Coverage: 195+ countries and territories, updated regularly to reflect national numbering plan changes.

View on GitHub

ITU & National Numbering Plan Documents

Public Registry

The International Telecommunication Union (ITU) maintains publicly available documents on national numbering plans, international calling codes (ITU-T E.164), and country-level telecom regulations. National telecom regulators (e.g. TRAI in India, OFCOM in the UK, FCC in the USA) also publish their numbering plans publicly.

What it provides: Country calling codes, area code structures, number length rules, and format conventions per country.

Third-Party Phone Data APIs

External APIs Where Available

For dynamic carrier lookup, timezone estimation, and geographic location data, we use legitimate third-party API services that aggregate publicly available telecom registration information. These providers operate in accordance with applicable data protection laws.

Important limitation: API data coverage varies by country and number type. When a provider does not return data, we display "Information not available" rather than estimating or fabricating a result.

What it provides: Carrier name (where available), timezone (based on number prefix), and general geographic region (based on number registration area, not real-time location).

What We Do Not Use

✕ Private subscriber records from telecom operators
✕ Real-time GPS or cell tower triangulation data
✕ Social media scraping for personal information
✕ Data purchased from data brokers or dark-web sources
✕ Law enforcement or government surveillance feeds

Look Up a Phone Number