Telephone country code +7 (dialed as 00 7 from many places) is Russia and Kazakhstan. A number beginning with +7 41 is a landline in the far eastern part of Russia, but you need one more digit to specify the area 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.)
There is no area code +1 742 in North America (USA, Canada, etc.). A number in the UK beginning with +44 74 is a mobile. An international number beginning with +7 42X is in Russia.
Area code 742 is unassigned.
There is no area code 795 in North America (USA, Canada, etc.).
The country code and area code of Acatepec, Mexico is 52, (01)741.
The country code and area code of Nagoan, Bangladesh is 880, (0)741.
The country code and area code of Rottweil, Germany is 49, (0)741.
The country code and area code of Coronel Bogado, Paraguay is 595, (0)741.
The country code and area code of El Gineina, Sudan is 249, (0)741.
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.