Country 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.
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 |
