May 21, 2014 · The area code for Thanh Hoa is 037, or +84 37 in international format. Asked in Calling and Area Codes Where is telephone country code 00101? That is not a valid telephone country code.

1 Area Code 786 is being applied as an "overlay" area code in the Florida Keys (Monroe County), which are currently served by the 305 area code. After the 305 area code has been fully assigned, area code 786, currently serving Miami-Dade County, will be assigned to new numbers in the Florida Keys. The new area code will only be assigned to new phone numbers, so existing numbers in the Florida Keys will not change.