There is no telephone country code 037, because telephone country codes never begin with zero.
Telephone country code +37 was East Germany. There are now ten different codes in the range +370 through +379 for various countries in Europe.
(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.)
The telephone country code for Vietnam is +84. The area code for Thanh Hoa is 037, or +84 37 in international format.
The telephone country code for Ghana is +233. The area code for Gambaga is 037, or +233 37 in international format. The local number is always 7 digits.
The telephone country code for Ghana is +233. The area code for Bole is 037, or +233 37 in international format. The local number is always 7 digits. Almost all telephone numbers in Ghana changed in 2010. An old Bole number of the form (0746) XXXXX changed to (037) 25X-XXXX.
The telephone country code for Ghana is +233. The area code for Buipe is 037, or +233 37 in international format. The local number is always 7 digits. Almost all telephone numbers in Ghana changed in 2010. An old Buipe number of the form (0716) XXXXX changed to (037) 22X-XXXX.
The telephone country code for Ghana is +233. The area code for Damongo is 037, or +233 37 in international format. The local number is always 7 digits. Almost all telephone numbers in Ghana changed in 2010. An old Damongo number of the form (0717) XXXXX changed to (037) 23X-XXXX.
The telephone country code for Ghana is +233. The area code for Salaga is 037, or +233 37 in international format. The local number is always 7 digits. Almost all telephone numbers in Ghana changed in 2010. An old Salaga number of the form (0752) XXXXX changed to (037) 26X-XXXX.
The telephone country code for Ghana is +233. The area code for Walewale is 037, or +233 37 in international format. The local number is always 7 digits. Almost all telephone numbers in Ghana changed in 2010. An old Walewale number of the form (0715) XXXXX changed to (037) 21X-XXXX.
The telephone country code for Ghana is +233. The area code for Yendi is 037, or +233 37 in international format. The local number is always 7 digits. Almost all telephone numbers in Ghana changed in 2010. An old Yendi number of the form (0744) XXXXX changed to (037) 24X-XXXX.
Leichtenstein is telephone country code +423.
where is telephone country code 1816
That is not a country code.
Country code +57 is Colombia.