'00' isn't part of the country code, it is a commonly used international access prefix. Country code +49 is Germany, and +49 15 is the beginning of a mobile number.
The country code for Germany is +49. You must also drop the leading '0' from the German domestic telephone number. For example, 089 for Munich becomes +49 89.
The country code and area code of Aachen, Germany is 49, (0)241.
Telephone country code +49 is Germany, but telephone area code +49 539 is invalid. There are no valid telephone numbers beginning with +49 539.(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.)
+49 is the country code for Germany
+49 is the code for Germany, it's not the code for any german city. +49 (0) 30 would be the code for Berlin.
The country code and area code of BÌ_ren, Germany is 49, (0)2951.
The country code and area code of Bad Honnef, Germany is 49, (0)2224.
Telephone country code +49 is Germany. Numbers beginning with +49 1 are mobiles.(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.)
+49 is the country code for Germany
Germany is country code +49.
Munich, Germany, is +49 89.