Telephone country codes never begin with zero.
Country code +49, dialed as 00 49 from many places, is Germany, and a number beginning with +49 1 is a mobile phone. However, the correct telephone country code is just +49.
Country code +91, dialed as 004 91 from many places, is India.
To avoid confusion, it is best to write an international telephone number in correct international format, beginning with the plus symbol and the correct telephone country code (e.g., +49 or +91), omitting any dialing prefix.
(The plus signmeans "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.)
00 isn't part of the country code, it is a commonly used international access prefix.
Country code +7 is Russia and Kazakhstan (formerly the entire USSR); a number beginning with +7 91 is most likely a Russian mobile phone.
(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.)
Telephone country codes never begin with zero.
Country code +691, dialed as 00 691 from many places, is the Federated States of Micronesia, including Chuuk, Yap, Pohnpei, and Kosrae.
Country code +91, dialed as 006 91 from many places, is India.
To avoid confusion, it is best to write an international telephone number in correct international format, beginning with the plus symbol and the correct telephone country code (e.g., +691 or +91), omitting any dialing prefix.
(The plus signmeans "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.)
Germany
Not sure which city
+49 (dialled as 0049 from many countries) is the country code for Germany
Country code +7 is Russia and Kazakhstan.
00491 CODE
Leichtenstein is telephone country code +423.
where is telephone country code 1816
That is not a country code.
There is no 909 country code.
There is no telephone country code +897, nor +89, nor any other country code beginning with +89. There are no valid telephone numbers beginning with +89.
Gibraltar is country code +350.
Moldova is country code +373.
Slovenia is country code +386.
Togo is country code +228.
Liberia is country code +231.
Angola is country code +244.
Mozambique is country code +258.