So based on what I'm seeing in there if there was North America award it would include central america.
The are two continents, North America and South America. Central America and Carribean are regions of North America, not continents, much like Scandinavia is a region of Europe for example.
A 'Master of North America' could be based on states and provinces, instead of countries. This would give you up to 94 distinct entities to work. I would add a proviso that having a 'Worked all States' does not automatically give you a 'M of NA', but would count towards it. 49 x US continental states (including Alaska, excluding Hawaii) 10 x Canadian provinces + 3 x territories 32 x Mexican states
So far the QRZ team has put out the following awards based on ARRL continent and country definitions. I left out the multi-band dimension to keep things simple. Master of Europe (67 countries) Master of South America (31 countries) If they continue this trend, we should see the following awards: Master of North America (47 countries, including North and Central America + Caribbean) Master of Africa (76 countries) Master of Asia (55 countries) Master of Oceania (64 countries) It would be nice to see the WAZ (Worked all Zones) based on the CQ world map (40 zones) as well.