The United States is in telephone country code +1 (along with Canada and certain Caribbean-ish islands). The international access prefix for outbound calls from Nepal is 00.
Thus, to call from Nepal to the US, on a mobile phone, just enter the number in full international format, beginning with the plus symbol; for example, +1 212 555 0123. From a landline phone, dial 00 1 instead of +1.
(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.)
Dial the International Access Code (011 from the US; something else from most other countries). Dial the UK Country Code (44). Dial the UK Area Code (WITHOUT the initial zero) Dial the UK Local Number.
Dial 011, the international access code. Dial 353, the Irish country code. Drop the 0 from the beginning of the city code. Dial the remaining digits.
You dial Russia from the US by first dialing the numbers you dial is 011, which is the US exit code. Next, dial the number 7 and the ten digit area phone number.
1 is the country code of the US. If you are outside of the US, you must dial 1 before any number to reach any number within the US. Every country has a different country code that you add to the beginning of a number in that country to dial a number in that country.
Just dial 1 + area code + number.
Dial the area code with a 1 in front of it (eg:1-714) then dial the number
To make a phone call or to fax from Argentina to the US a person will need to dial the country code first. To fax a number to the US dial the country code +1 followed by the fax number.
Pattaya, Thailand, is in country code +66, area code 38. From the US, dial 011-66-38.
Dial the ISD code to US (001) and then dial the number you wish. There are several different area codes for different parts of Missouri.
If it's country code +234 (Nigeria), dial the international access prefix (011 from the US), country code 234, and the Nigerian number (omitting the leading zero). If it's area code +1 234 (Akron/Canton/Youngstown, OH), dial "one-plus"
Nepal
If you are in the US, Canada, or various Caribbean-ish islands that are part of the North American Numbering Plan (country code +1), you just dial 1 + area code + number. If you are elsewhere in the world, dial your international access prefix, followed by the country code 1, area code, and number.