No, country code +66 is Thailand. Numbers beginning with +66 6 are VoIP numbers.
(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.)
666
There is no area code 666 in North America (USA, Canada, etc.).
666 is the code
The numder is 666
666
666
666
Oh, dude, country code 666 doesn't actually exist. It's like the Bermuda Triangle of phone codes - just a mysterious void where your calls disappear into the abyss. So, if you're trying to reach Satan or something, you might need to find a different area code.
World
Generally speaking, a moral reform is simply a shift in a society's ideas of what is acceptable or not.
There is no area in the US which uses 666 as its area code. In fact not only 666 but also 663, 665 and 668 and many more. No further information available why those numbers are not being used.
No. In Wadsworth, Ohio there are tons of 666 area code numbers.