There are many available servers in Tome of the Sun. All of them have a unique name but the worlds are exactly the same, except for the UTC time zone (Coordinated Universal Time). You can have multiple heroes at the same time, either within the same server or in different servers.
The list of servers, in order as shown in the game, are as follows:
SA: UTC-3[]
- Peacock
EU: UTC+1[]
- Mao
- Yeti
- Deepking
- Fundo
- Skylor
- PeachOrchard
NA: UTC-7[]
- Specter
- Puffin
- Sphinx
- Siren
- Basilisk
- Grizzly
- Kirin
- TulipGarden
AU: UTC+10[]
- AzureDragon
- Pavilion