Whether you're reaching a colleague in Tokyo, a hotel in Paris, or family in Mumbai, understanding international call codes is the key to making your connection work on the first attempt. International call codes route telephone calls across national borders, and once you know the simple formula behind them, dialing anywhere in the world becomes straightforward. This page breaks down the dialing format, lists country calling codes by region, and covers the tips you need to avoid common mistakes.

Quick Guide: How to Make an International Phone Call

If you just need to place an international phone call right now, here's the fastest answer. The dialing format includes an international dialing prefix (IDD), a country code, an area code (if applicable), and the local subscriber number.

The formula:

IDD + Country Code + Area/City Code + Subscriber Number

The IDD for the US and Canada is 011. The IDD for most countries is 00. On a mobile phone, a plus sign can serve as a universal exit code - press and hold the "0" key (or the "+" key on iOS) to produce it, and it replaces whatever IDD your country uses.

Three worked examples:

Notice that you remove the leading zero from area codes when dialing internationally. London's domestic code "020" becomes "20" after +44, and the German mobile prefix "0151" becomes "151" after +49.

Common mistakes to avoid:

Leaving the domestic trunk prefix (the leading "0") in the number - writing +44 020 instead of +44 20

Confusing the IDD (exit code) with the country code - dialing "44" alone without the exit code from a landline

Dialing too many or too few digits, especially in countries with variable-length area codes

Not using the "+" format when saving contacts, which causes failures when roaming or switching SIM cards

For deeper explanations, keep reading. The rest of this page covers what country codes actually are, a regional overview covering the united kingdom (+44), US and Canada (+1), and codes across europe, Africa, and Asia, plus frequently asked questions.

What Are Country Calling Codes and International Dialing Codes?

Country calling codes are 1 to 3 digit numeric prefixes - like +1, +44, or +91 - assigned to each country or region to route international calls correctly. They are defined under the ITU-T Recommendation E.164, the international standard for telephone numbering that has been in place since the 1960s and was most recently revised in 2020.

International call codes consist of two parts: an international exit code (the IDD) and a country code. The exit code signals that you are dialing outside your current country, while the country code identifies the destination. International dialing prefixes vary by country - often "00" or "011" - and are separate from the destination's country code.

Country codes range from 1 to 3 digits long. Examples of country codes include +1 for the USA and +44 for the UK. Here are other well-known codes:

Country codes are used to route international calls correctly across networks worldwide. Some codes are "non-geographic" - for instance, +882 and +883 are assigned to global or satellite service providers rather than a single international country. ISO 3166-1 alpha-2 codes (like US, GB, DE) are often used alongside calling codes in lookup tools and databases, but they are a separate system.

Step-by-Step: How to Dial International Phone Numbers Correctly

This section breaks the international dialing process into clear steps for both landline and mobile phone users.

First, find your country's IDD - the exit code that tells your telephone network you're making an international phone call rather than domestic calls. From the US and Canada, that's 011. From the united kingdom and france, it's 00. From Australia, it's 0011.

Second, look up the destination's country code. The US country code is +1 or 00 1. Country calling codes usually have 1-3 digits - one digit for North America, two for most of europe, and three for many smaller nations.

Third, determine whether an area code is needed. Many countries use area codes to identify a city or region. In most countries, a domestic trunk prefix (usually "0") precedes the area code for long distance calls within the country, but you remove the leading zero when dialing international numbers. For example, moscow uses "095" domestically, but internationally it becomes +7 495. Similarly, a uk number starting with "020" becomes +44 20.

Fourth, dial the rest of the subscriber number. Whether you're calling a landline or a mobile, the structure stays the same: IDD + country code + area/mobile prefix + subscriber number.

VoIP and messaging apps like WhatsApp and Signal accept the international format starting with "+" and do not require users to know the local IDD prefix. Always store contacts in E.164 format for best results.

Before placing calls to foreign countries, check the local time at the destination. A call that connects perfectly in format won't help if subscribers are asleep.

Regional Overview of Country Codes and Calling Structures

Country calling codes were assigned in geographic blocks, so the initial digits of a country code often indicate a world zone. Zone 1 covers North America and the caribbean, zone 2 covers much of Africa, zones 3 and 4 span europe, zone 5 includes south America, and zones 6 through 9 cover Asia, Oceania, and special service codes.

Larger or earlier-assigned countries received two-digit codes (like +33 for france, +44 for the united kingdom, +81 for Japan), while smaller or later-assigned nations use three-digit codes. The ITU periodically updates these allocations, and unassigned or reserved codes exist in every block for future use.

North American Numbering Plan (Country Code +1)

The north american numbering plan (NANP) is a shared system where the United States, canada, and several caribbean and atlantic west territories all use the single country code +1. The format is straightforward: +1 followed by a three-digit numbering plan area (NPA) code, then seven digits for the local number.

Examples of NPA assignments include +1 212 for New York city, +1 604 for Vancouver (canada), +1 876 for Jamaica, +1 246 for Barbados, +1 671 for guam, and +1 649 for the Turks and caicos islands. Even norfolk island routing and christmas island connections may depend on NANP or their administering nation's code.

Although these territories share a dialing code, each is a separate country or region with different regulations and sometimes different calling rates. Within the NANP, dialing between NPAs may require the full ten-digit or eleven-digit number, but callers from other countries always start with +1.

Mostly Europe (Country Codes Starting with 3 and 4)

Most European country codes fall in the +3x and +4x ranges. Major countries received two-digit codes: +33 france, +34 Spain, +39 italy, +44 united kingdom, +49 Germany. Smaller nations use three-digit codes - +352 Luxembourg, +356 Malta, +372 Estonia, +380 Ukraine, +389 for North macedonia.

European numbering plans typically include a "0" trunk prefix for domestic calls, which is dropped when using the international country code. For example, a Paris landline dialed domestically as "01 XX XX XX XX" becomes +33 1 XX XX XX XX from abroad.

While the EU has harmonized emergency numbers like 112, each country still manages its own area codes and subscriber number lengths independently.

Mostly Africa and Nearby Islands

African countries share the +2x code ranges: +20 Egypt, +212 Morocco, +221 Senegal, +234 Nigeria, +254 Kenya, +27 south Africa, +233 ghana, +216 tunisia, +243 for the Democratic republic of congo. Some nearby islands and territories appear here too, including diego garcia (+246, British Indian Ocean Territory).

Mobile penetration has grown rapidly across the continent, so many international calls now terminate on mobile networks rather than fixed landline infrastructure. Numbering plans vary - some countries use fixed-length national numbers while others have variable-length area codes.

Territories linked to European administrations may carry codes from different zones: french guiana, for instance, uses +594. The bolivarian republic of Venezuela uses +58 in the south American zone.

Russia, CIS, and Former Soviet Republics

During the Soviet era, a single country code +7 was assigned to the entire USSR. After 1991, the numbering space was divided among newly independent states. Today, Russia and Kazakhstan still share the +7 code, while other former republics were assigned their own: +375 Belarus, +380 Ukraine, +373 Moldova, +995 georgia, +994 Azerbaijan, +998 Uzbekistan.

Some of these transitions took years, and old Soviet-era dialing patterns were only gradually replaced. Callers today should always use the current assigned code rather than outdated references. If you compare older printed directories with current ITU data, you may notice discrepancies - always trust the newer source.

Special Cases: Antarctica and Territories Without Their Own Country Code

Antarctica does not have a dedicated country code. Each scientific base uses the numbering plan of its operating nation - an Australian base dials via +61, a Chilean base via +56.

Some small islands and dependencies also lack unique codes and instead connect through the code of their administering country. In these cases, confirm the exact dialing pattern with the local service provider, since routing may depend on satellite links or specialized networks.

How to Identify the Country of an International Phone Number

The initial digits after the "+" in an international phone number reveal its country code and therefore its likely origin. Since country codes are one to three digits long, you check whether the first digit alone matches a code (like +1), the first two digits match (like +44 or +33), or the first three digits match (like +351 or +971).

Quick examples: +44 20 indicates the united kingdom, +34 6 suggests a Spanish mobile, +91 22 points to a landline in Mumbai, and +61 4 usually means an Australian mobile.

After the country code, additional prefixes can reveal whether a line is fixed, mobile, toll-free, or premium-rate. However, caller ID spoofing can fake the apparent origin of an international call, so treat unknown numbers cautiously. If a number's origin is unclear or fraud is suspected, use your national telecom regulator's lookup page to verify.

Common Questions About International Calling and Country Codes

Here are answers to the most frequently asked questions about making international calls, dialing codes, and number formats.

Does +44 replace the leading 0 in UK numbers? Yes. When calling a uk number from abroad, drop the trunk prefix "0" and use +44 instead. So 020 7123 4567 becomes +44 20 7123 4567. The same rule applies in most countries with a "0" prefix.

Do I still need a country code for mobile phones? Absolutely. Whether you're calling a landline or a mobile phone internationally, the country calling code is required. Mobile prefixes vary - UK mobiles often start with 07, france uses 06 or 07, and India uses 9x or 8x ranges - but the dialing structure is the same.

How much do international calls cost? Costs vary significantly by carrier, destination, and plan. Traditional telephone carriers often charge a premium per minute for international calls compared to domestic calls. Compare rates and consider VoIP options or international calling plans from your provider for savings.

What does the "+" sign actually mean? The "+" is a universal placeholder for whatever international dialing prefix your country uses. On a mobile phone, it's translated automatically - users don't need to memorize whether their IDD is 00, 011, or 0011. On a landline, you must dial the actual exit code instead.

Do messaging apps use the same format? Yes. Apps like WhatsApp, Signal, and Telegram require the same E.164 format: +country code followed by the number without trunk prefixes. This is the standard across virtually all digital communication networks.

Always store contacts in full international format (+country code + number). This ensures your calls and messages connect seamlessly whether you're at home, roaming, or using a different SIM card - no matter which country you're in.

Bookmark this page as your quick reference the next time you need to dial abroad, and you'll never second-guess another digit.