Does it charge you when you call a 800 number?

Answer 1

Within North America, a North American 800 number is toll-free, although airtime charges may apply if you're calling on a cell phone. Calling a North American +1 800 number, or the other toll-free codes (888, 877, 866, 855, and future 844, 833, and 822) from outside North America will probably be billed at the rate for an ordinary number in the USA.

Other countries have domestic toll-free codes, in many cases on numbers similar to 800 or 0800. Those numbers are generally free from landlines, but may or may not be charged from mobiles.

International country code +800 (dialed as 00 800 from most of the world, or 011 800 from North America) is Universal International Freephone Numbers, which are free from countries that support the service and from which the recipient agrees to accept calls.

(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, and many other countries use different prefixes.)

Answer 2

In North America, 800 numbers are toll-free. However, airtime charges still apply for calls from cellphones.