This is the full list of statuses and corresponding reputation points:

Stranger: 0 ... 99 Newbie: 100 ... 499 Junior: 500-999 Resident: 1000 ... 2499 Senior: 2500 ... 4999 Hero: 5000 ... 9999 Superhero: 10000

You can see more details in the FAQ Status, Rating and Privileges section.

The next status is Newbie. You can read about statuses here