To summarize the long chain of comments.
Important point to note is that when you say static ip, it could mean static ip from clients point of view or static ip from routers point of view. So from clients side, they would be
static ip vs
curiously static dynamic ip.
If you are on a company lan, it is all the more likely it is the latter, though could be former as well.
If you are interested in only the former (pure client side static IP), you should be able to find it from
/etc/network/interfaces (not sure why you are not able to see), and from network manager gui in Ubuntu, as shown below: