Your county website is where you will find your lease and assignments of it to others, at least in Pa. Check with the Recorder of Deeds Section online, or in person at your county courthouse.
North Coast Energy Inc is a subsiduary of Exco Resources....see the link below
Looks like they applied for their first permit in sullivan recently...Cheif and Chesepeake are the 2 big players there
If their getting "close" you may magically end up in a pooling unit. From what I see on "rlstore" they probably still hold your lease
Andarko has been buying up some leases there also