There is no area code 893 in the current North American Numbering Plan (NANP), which includes the United States, Canada, and other territories. Area codes are typically assigned to specific geographic regions, but 893 does not correspond to any specific location.
It’s possible that 893 could be a future area code, or it might be an internal or special code used for purposes outside of standard geographic telephone assignments. Always verify area codes with trusted sources, especially if you are dealing with unfamiliar or suspicious phone numbers.