Where is telephone country code 336?

Answer 1

Part of North Carolina, including Greensboro, High Point, and Winston-Salem.
The area that is served by area code 336 is north-central North Carolina. It mainly covers the Piedmont Triad region and the Northern Foothills and northern mountain regions.

Answer 2

Telephone country code +33 (dialed as 00 33 from many places) is France. +33 6 is a mobile phone number in France. Some mobile numbers in France also begin with +33 7.

(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.)