Country code +33 (dialed as 00 33 from many places) is the code for France, followed by the subscriber number without the leading '0'. (For example, Paris numbers begin with +33 1, not with +33 01.)
+33 1 = Paris region
+33 2 = northwest
+33 3 = northeast
+33 4 = southeast
+33 5 = southwest
+33 6 and +33 7 = mobiles
+33 8 = freephone and shared-cost numbers (may not be accessible from outside France)
+33 9 = non-geographic numbers, including VoIP
(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)
STD code for France is 0033
'00' is not part of the country code, it is a commonly used international access prefix. Country code +33 is France, and a number beginning with +33 4 is in the southeastern part of the country. It looks like a number beginning with +33 4 66 is in or near Nîmes.
The telephone country code for France is +33. The area code for the southeastern quadrant of the country, including the island of Corsica, is 04, or +33 4 in international format.
The telephone country code for France is +33. The area code for the northeastern quadrant of the country is 03, or +33 3 in international format. The local number is a further 8 digits.
The telephone country code for France is +33. The area code for the southwestern part of the country is 05, or +33 5 in international format. The local number is a further 8 digits.
The telephone country code for France is +33. The area code for Corsica is 04, or +33 4 in international format. The local number is a further 8 digits.
The country code for France is +33. Paris is in area code +33 1, or 01 within France.
The telephone country code for France is +33. The area code for Bourgogne is 03, or +33 3 in international format. The local number is a further 8 digits.
The telephone country code for France is +33. The area code for Bretagne is 02, or +33 2 in international format. The local number is a further 8 digits.
The telephone country code for France is +33. The area code for Limousin is 05, or +33 5 in international format. The local number is a further 8 digits.
The telephone country code for France is +33. The area code for Picardie is 03, or +33 3 in international format. The local number is a further 8 digits.
The telephone country code for France is +33. When calling from outside France, you must drop the leading '0' from the French number.