Non-NANP jurisdictions (i.e., the rest of the world) identified a Caribbean calling destination by analyzing the first six digits dialed (1809xx), therefore, faced the difficulty where a seventh digit was required to identify the specific nation.
Regions outside of the North American Numbering Plan (NANP) recognized a Caribbean phone number by examining the initial six digits dialed (1809xx), which created an obstacle in identifying the specific country with just one additional digit.