Country calling codes
CCITT was the first organization, which created the formal list of telephone country codes, it was the serious part of CCITT Blue Book, printed in 1964 first time. The CCITT Blue Book also includes international recommendations in phone and other communicatins area. Now it become a famous ITU-T recommendation E.164. The oldest system of country phone codes appeared in Europe - CCITT Red Book, it was codificated in early 1960. Some codes was accepted in a CCITT Blue Book too and remain in use up to nowdays. For example, +33 is a France code and +44 is the United Kingdom one.
Primarily several countries had got two digit codes because of its big size and amount of users, for example, France or the United Kingdom. There for small countries had got three digit codes, like Iceland and Sweden. In 1980s all codes became three digit, and the size of country doesn’t matter anything now. And now ) calling codes is listed in a ITU-T recommendation E.164. ITU-T is a successor of CCITT and defined by ITU (International Telecommunication Union). This organization was created in 1865 like an International Telegraph Union and make the international telecommunication standarts like ITU-T for phone communication, ITU-R for radio and ITU-D for other networks.
Below is a list of European countries (Zone 3 & 4) calling codes defined by ITU-T recommendation E.164.
| Country | Code |
| Albania | +355 |
| Andorra | +376 |
| Armenia | +374 |
| Austria | +43 |
| Belarus | +375 |
| Belgium | +32 |
| Bosnia and Herzegovina | +387 |
| Bulgaria | +359 |
| Croatia | +385 |
| Cyprus | +357 |
| Czech Republic | +420 |
| Denmark | +45 |
| Estonia | +372 |
| Finland | +358 |
| France | +33 |
| Germany | +49 |
| Gibraltar | +350 |
| Greece | +30 |
| Hungary | +36 |
| Iceland | +354 |
| Italy and Vatican City | +39 |
| Kosovo, which is under UN administration, uses +381 (Serbia) for landlines but +377 (Monaco) for mobile phones. | +381 or +377 |
| Latvia | +371 |
| Liechtenstein | +423 |
| Lithuania | +370 |
| Luxembourg | +352 |
| Malta | +356 |
| Moldova | +373 |
| Monaco, and currently also used by mobile phone networks in Kosovo. | +377 |
| Montenegro | +382 |
| Norway | +47 |
| Poland | +48 |
| Portugal | +351 |
| Republic of Ireland | +353 |
| Republic of Macedonia | +389 |
| Romania | +40 |
| San Marino | +378 |
| Serbia | +381 |
| Slovakia | +421 |
| Slovenia | +386 |
| Spain | +34 |
| Sweden | +46 |
| Switzerland | +41 |
| The Netherlands | +31 |
| Ukraine | +380 |
| United Kingdom | +44 |
| Vatican City but uses 39 with Italy. | +379 |
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