Is it possible to find a lost iPhone using location services without an App?

Is there any way to find my lost iPhone? It should still be powered on with its location services on as well. I don't have any App on the phone that is going to allow me to find it, so an App suggestion unfortunately will not be helpful. I have a general idea of where it is lost (a large school), but I would need specifics in order to find the phone. Any advice?

Go to www.iCloud.com and login with your apple details. After that click the Find My iPhone Icon. Then after that click the devices button, and select your device after that choose play sound, and your device should start beeping and also during this time you should be able to track in on the map. Hope you find your phone soon.