The USA uses country code +1
The country that uses the phone code +50 is Peru. However, it's worth noting that the correct international dialing code for Peru is actually +51. If you meant a different code or country, please provide more details.
Telephone country code +81 is Japan, and +81 3 is Tokyo.Telephone country code +82 is South Korea, and +82 2 is Seoul.(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.)
00 1 followed by the rest of the Canadian number.
Australia uses country code +61. From the UK, dial 00 61 then the full Australian number minus any leading zero.
The telephone country code for the United States is +1.To call other countries from the United States, 011 has to preface the other country's code.(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.)
'00' is not part of the country code, it is a commonly used international access prefix. Country code +20 is Egypt, but there is no area code 87 in Egypt.In the UK, a number beginning with 02087 is in area code 020 (London, +44 20 internationally).(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 +592, dialed as 00 592 from many places, is Guyana.Country code +92, dialed as 005 92 from many places, is Pakistan.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., +592 or +92), 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.)
India is country code +91, and New Delhi is area code +91 11 (or area code 011 within India).(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.)
008 is used as an international dialing prefix, or exit code, in Indonesia, Singapore, South Korea, Hong Kong, and Thailand.(In an international telephone number, the plus sign means "insert your international dialing 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 +97, dialed as 00 97 from many places, is an incomplete code somewhere in Asia. For example, +971 is the United Arab Emirates and +977 is Nepal.Country code +7, dialed as 009 7 from many places, is Russia and Kazakhstan.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., +971 or +7), 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.)
050 (or +233 50) is a mobile code in Ghana.050 (or +232 50) is a mobile code in Sierra Leone.(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.)