| 208.0.0.0/8 | WHOIS (ARIN) | American Registry for Internet Numbers | US |
| 208.53.192.0/18 | BGP route | AS13576 SDN Communications | — |
| 208.53.192.0/18 | WHOIS (ARIN) | SDN Communications | US |
| 208.53.192.0/18 | ARIN assigned | — | US |
| 208.53.224.0/20 | BGP route | AS63172 Venture Communications Cooperative | — |
| 208.53.224.0/20 | WHOIS (ARIN) | Venture Communications | US |
| 208.53.196.0/22 | WHOIS (ARIN) | Midstate communications | US |
| 208.53.198.0/23 | BGP route | AS13576 SDN Communications | — |
| 208.53.204.0/23 | BGP route | AS399439 Mitchell Telecom | — |
| 208.53.204.0/23 | WHOIS (ARIN) | Mitchell Telecom | US |
| 208.53.222.0/23 | BGP route | AS399439 Mitchell Telecom | — |
| 208.53.222.0/23 | WHOIS (ARIN) | Mitchell Telecom | US |
| 208.53.224.0/23 | BGP route | AS63172 Venture Communications Cooperative | — |
| 208.53.226.0/23 | BGP route | AS63172 Venture Communications Cooperative | — |
| 208.53.228.0/23 | BGP route | AS63172 Venture Communications Cooperative | — |
| 208.53.230.0/23 | BGP route | AS63172 Venture Communications Cooperative | — |
| 208.53.232.0/23 | BGP route | AS63172 Venture Communications Cooperative | — |
| 208.53.234.0/23 | BGP route | AS63172 Venture Communications Cooperative | — |
| 208.53.236.0/23 | BGP route | AS63172 Venture Communications Cooperative | — |
| 208.53.240.0/23 | BGP route | AS401415 Alliance Communications | — |
| 208.53.240.0/23 | WHOIS (ARIN) | Alliance Communications | US |
| 208.53.244.0/23 | BGP route | AS399439 Mitchell Telecom | — |
| 208.53.244.0/23 | WHOIS (ARIN) | Mitchell Telecom | US |
| 208.53.254.0/23 | BGP route | AS399439 Mitchell Telecom | — |
| 208.53.254.0/23 | WHOIS (ARIN) | Mitchell Telecom | US |
| 208.53.192.0/24 | BGP route | AS399439 Mitchell Telecom | — |
| 208.53.192.0/24 | WHOIS (ARIN) | Mitchell Telecom | US |
| 208.53.193.0/24 | BGP route | AS13576 SDN Communications | — |
| 208.53.193.0/24 | WHOIS (ARIN) | Midstate communications | US |
| 208.53.194.0/24 | BGP route | AS13576 SDN Communications | — |
| 208.53.194.0/24 | WHOIS (ARIN) | Hanson Communications, Inc. | US |
| 208.53.196.0/24 | BGP route | AS13576 SDN Communications | — |
| 208.53.197.0/24 | BGP route | AS13576 SDN Communications | — |
| 208.53.201.0/24 | WHOIS (ARIN) | SDN Communications | US |
| 208.53.202.0/24 | BGP route | AS13576 SDN Communications | — |
| 208.53.202.0/24 | WHOIS (ARIN) | Mt. Rushmore Telephone Co. | US |
| 208.53.203.0/24 | BGP route | AS13576 SDN Communications | — |
| 208.53.203.0/24 | WHOIS (ARIN) | FORT RANDALL TELEPHONE | US |
| 208.53.207.0/24 | BGP route | AS13576 SDN Communications | — |
| 208.53.207.0/24 | WHOIS (ARIN) | SDN-BCKB | US |
| 208.53.208.0/24 | BGP route | AS13576 SDN Communications | — |
| 208.53.208.0/24 | WHOIS (ARIN) | SDN-BCKB | US |
| 208.53.209.0/24 | BGP route | AS13576 SDN Communications | — |
| 208.53.209.0/24 | WHOIS (ARIN) | Midstate communications | US |
| 208.53.211.0/24 | BGP route | AS13576 SDN Communications | — |
| 208.53.211.0/24 | WHOIS (ARIN) | Mt. Rushmore Telephone Co. | US |
| 208.53.212.0/24 | BGP route | AS393417 SDN Communications | — |
| 208.53.212.0/24 | WHOIS (ARIN) | SDN-BKBN | US |
| 208.53.213.0/24 | BGP route | AS17203 Beresford Municipal Telephone Company | — |
| 208.53.213.0/24 | WHOIS (ARIN) | Beresford Municipal Telephone | US |
| 208.53.220.0/24 | BGP route | AS36013 Missouri River Energy Services | — |
| 208.53.220.0/24 | WHOIS (ARIN) | Missouri River Energy Services | US |
| 208.53.221.0/24 | BGP route | AS13576 SDN Communications | — |
| 208.53.221.0/24 | WHOIS (ARIN) | Midstate Communications, Inc. | US |
| 208.53.238.0/24 | BGP route | AS63172 Venture Communications Cooperative | — |
| 208.53.247.0/24 | BGP route | AS18785 Santel Communications Cooperative, Inc. | — |
| 208.53.247.0/24 | WHOIS (ARIN) | Santel Communications Cooperative, Inc. | US |
| 208.53.248.0/24 | BGP route | AS25732 Total Card, Inc. | — |
| 208.53.248.0/24 | WHOIS (ARIN) | Total Card, Inc. | US |
| 208.53.250.0/24 | BGP route | AS399439 Mitchell Telecom | — |
| 208.53.250.0/24 | WHOIS (ARIN) | Mitchell Telecom | US |
| 208.53.251.0/24 | BGP route | AS399439 Mitchell Telecom | — |
| 208.53.251.0/24 | WHOIS (ARIN) | Mitchell Telecom | US |
| 208.53.252.0/24 | BGP route | AS13576 SDN Communications | — |
| 208.53.252.0/24 | WHOIS (ARIN) | Infotech Solutions LLC | US |
| 208.53.253.0/24 | BGP route | AS63172 Venture Communications Cooperative | — |
| 208.53.253.0/24 | WHOIS (ARIN) | Venture Communications | US |
| 208.53.210.192/26 | WHOIS (ARIN) | COMMUNITY INTERNET SERVICE | US |
| 208.53.215.0/26 | WHOIS (ARIN) | Sanborn Telephone Cooperative | US |
| 208.53.215.192/26 | WHOIS (ARIN) | Alliance Communications | US |
| 208.53.243.64/26 | WHOIS (ARIN) | SDN-BCKB | US |
| 208.53.243.128/26 | WHOIS (ARIN) | SDN Communications | US |
| 208.53.195.0/27 | WHOIS (ARIN) | Sanborn Telephone Cooperative | US |
| 208.53.195.32/27 | WHOIS (ARIN) | Raven Industries | US |
| 208.53.195.128/27 | WHOIS (ARIN) | SDN-BCKB | US |
| 208.53.200.64/27 | WHOIS (ARIN) | DACOTAH BANK | US |
| 208.53.200.128/27 | WHOIS (ARIN) | CentralSquare Technologies | US |
| 208.53.214.96/27 | WHOIS (ARIN) | Alliance Communications | US |
| 208.53.214.160/27 | WHOIS (ARIN) | Venture Communications | US |
| 208.53.215.160/27 | WHOIS (ARIN) | BP Wind Energy | US |
| 208.53.210.160/28 | WHOIS (ARIN) | Performance Data Center | US |
| 208.53.214.0/28 | WHOIS (ARIN) | VENTU-3 | US |
| 208.53.214.128/28 | WHOIS (ARIN) | Schwans Shared Services LLC | US |
| 208.53.243.0/28 | WHOIS (ARIN) | Valley | US |
| 208.53.243.16/28 | WHOIS (ARIN) | Flandreau Santee Sioux Tribe | US |
| 208.53.195.104/29 | WHOIS (ARIN) | Venture Communications | US |
| 208.53.195.112/29 | WHOIS (ARIN) | BANCO-21 | US |
| 208.53.200.0/29 | WHOIS (ARIN) | AUTOMATIC BUILDING CONTROLS, INC | US |