North Dakota Telephone Co. NDTEL-2-NDTC (NET-64-21-224-0-1) 64.21.224.0 - 64.21.255.255 IdeaOne Telecom IDEAONE-1 (NET-64-21-232-0-1) 64.21.232.0 - 64.21.247.255 Applied Engineering IDEAONE-64-21-233-208 (NET-64-21-233-208-1) 64.21.233.208 - 64.21.233.215