To Search for an ArcSDE version within your Enterprise Geodatabase, you have three ways:

1. form the oracle database table unser SDE user schema: SDE.VERSIONS 

2. using ArcSDE Command Line: sdeversion -o describe -u sde -p XXXX -i 5151 -s server_name

3. from ArcCatalog (version 10.1) from Geodatabase Administration -> under ‘Versions’ tab.