Thailand: 001 – CAT Telecom standard.

Is +1 the same as 001?

The international country code for the United States is +1 (001).

What is a 00 phone number?

There are no telephone numbers beginning with 00 in the UK. 00 is the International access code - that is, you dial it at the start of a call to another country. All such calls are charged at international rates, except for calls from Northern Ireland to the Republic of Ireland.