Country Dialing Codes Database

What is a Country Dialing Code?

A country dialing code (also called a country calling code or international subscriber dialing code) is a telephone number prefix used to dial into a specific country from abroad. These codes are defined by the International Telecommunication Union (ITU) in its standard E.164. For example, the United States and Canada share +1, while India uses +91 and the United Kingdom uses +44.

What is the IDD Prefix?

The International Direct Dialing (IDD) prefix is the number you dial before the country code when making an international call. It varies by country:

• 00 — Most of Europe, Asia, Africa
• 011 — United States, Canada, and NANP countries
• 0011 — Australia
• 810 — Russia, Belarus
• 001 — Singapore, Cambodia, South Korea

What is a Trunk Prefix?

The trunk prefix (also called the national access code) is a digit dialed before a national number for domestic long-distance calls. In most countries it is 0, but in North America it is 1. Some countries (like Denmark and Italy) have no trunk prefix. When dialing internationally, the trunk prefix is dropped from the number.

How to Make an International Call

To call another country, follow this format:

• Dial your country's IDD prefix (e.g., 00 or 011)
• Dial the destination country code (e.g., +44 for UK)
• Dial the local number without the trunk prefix
• Example: from US to UK — 011 + 44 + local number
• From a mobile, use + instead of the IDD prefix