What is this number 650 543 4800?

The number 650 543 4800 appears to be a standard 10-digit phone number format used in many countries, +1-833-203-5957 particularly in the United States. It follows the North American Numbering Plan (NANP), which governs telephone number formats in the U.S., Canada, and several other countries in the Caribbean.

Source: https://developer-community.sage.com/topic/5587-what-is-this-number-650-543-4800-facebook-trust/