It can be anything! An apex, subdomain, or even a URL.

Results fornational.inria.fr

Domain Name	First seen	Still exists
vpn2-roc.national.inria.fr	2018-10-12T13:44:27.943Z
vpn4-sop.national.inria.fr	2018-10-12T13:44:06.550Z
smngt-40taine.national.inria.fr	2017-05-22T21:55:58.438Z
smgt-40aine.national.inria.fr	2017-04-12T22:26:43.766Z
igcgen.national.inria.fr	2016-09-20T22:37:58.673Z
vpn3-sop.national.inria.fr	2014-10-17T12:33:25.935Z
pontneuf.national.inria.fr	2013-06-21T17:17:17.835Z
mail2-admin-roc.national.inria.fr	2013-04-27T05:22:28.785Z
mail2-relais-roc.national.inria.fr	2013-04-27T05:22:28.785Z
mail2-smtp-roc.national.inria.fr	2013-04-27T05:22:28.785Z
mail3-admin-sop.national.inria.fr	2013-04-27T05:22:28.785Z
mail3-relais-sop.national.inria.fr	2013-04-27T05:22:28.785Z
mail3-smtp-sop.national.inria.fr	2013-04-27T05:22:28.785Z
smngt-admin.national.inria.fr	2013-04-27T05:22:28.785Z
mail1-admin-roc.national.inria.fr	2013-04-27T05:22:28.785Z
mail1-relais-roc.national.inria.fr	2013-04-27T05:22:28.785Z
mail1-smtp-roc.national.inria.fr	2013-04-27T05:22:28.785Z
mail4-admin-sop.national.inria.fr	2013-04-27T05:22:28.785Z
mail4-relais-sop.national.inria.fr	2013-04-27T05:22:28.785Z
mail4-smtp-sop.national.inria.fr	2013-04-27T05:22:28.785Z
mailsv-config.national.inria.fr	2013-04-27T05:22:28.785Z
vpn1-roc.national.inria.fr	2013-04-25T11:30:00.145Z