What is the dialing code for America from an oil rig in the North Sea?

Answer 1

The telephone country code for North America (including the USA and Canada) is +1.

If you are on an oil rig in the North Sea, you are most likely using a satellite telephone. The instructions for dialing may depend on which satellite service you are using. If the handset gives you the option to enter the plus symbol, then enter the number in full international format; for example, +1 212 555 0123 (without the spaces). Alternatively, the equipment may not require a prefix, since all calls must be dialed with the full international number, or it may use 00, the most commonly used prefix.

A North American telephone number is always +1 followed by a 3-digit area code and 7-digit subscriber number.

(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.)