About Area Code Lookup

Area Code Lookup is a free, independent reference for international telephone calling codes. We cover 229 countries and territories, including every national calling code in the ITU-T E.164 numbering plan, plus detailed US area codes for all 50 states and US territories (323 area codes in total).

What We Provide

• International calling codes for 229 countries and territories, verified against ITU-T E.164
• Complete US area code lists by state — including overlays and territory codes (Puerto Rico, Guam, US Virgin Islands and more)
• Step-by-step dialing instructions, time zone references, emergency numbers and city area codes for major countries
• A free directory searchable by country, city, or area code

Our Data

Country calling codes follow the ITU-T Recommendation E.164 (International Telecommunication Union). US area codes follow the North American Numbering Plan (NANP), administered by NANPA. We review the data regularly and correct discrepancies as soon as they are reported.

All information on this site is provided free of charge and for reference purposes only. Numbering plans change (new overlays, new codes), so always confirm the final number with your phone carrier before dialing.

Accuracy & Corrections

We take data accuracy seriously. If you spot an error — a wrong code, a missing overlay, or an outdated format — please tell us and we will fix it promptly. See our contact page for the fastest way to reach us.

Our Mission

International calling should not be confusing. Our goal is to make dialing code lookup simple, fast, and free for everyone — whether you are a business making international calls, a traveler connecting with family, or just curious about how the world's numbering plans fit together.

Contact

For questions, corrections, or suggestions, please reach out through our contact page.