| 216.0.0.0/8 | WHOIS (ARIN) | American Registry for Internet Numbers | US |
| 216.51.128.0/17 | BGP route | AS5056 Aureon Network Services | — |
| 216.51.128.0/17 | WHOIS (ARIN) | Aureon Network Services | US |
| 216.51.128.0/17 | ARIN assigned | — | US |
| 216.51.240.0/22 | WHOIS (ARIN) | Hospers Telephone | US |
| 216.51.252.0/22 | BGP route | AS19628 Mahaska Communication Group, LLC | — |
| 216.51.252.0/22 | WHOIS (ARIN) | Mahaska Communication Group, LLC | US |
| 216.51.180.0/23 | BGP route | AS5056 Aureon Network Services | — |
| 216.51.186.0/23 | BGP route | AS399693 Northwest Communications | — |
| 216.51.186.0/23 | WHOIS (ARIN) | Northwest Telephone Coop. Assn. | US |
| 216.51.236.0/23 | BGP route | AS5056 Aureon Network Services | — |
| 216.51.236.0/23 | WHOIS (ARIN) | Ogden Telephone Company | US |
| 216.51.246.0/23 | WHOIS (ARIN) | Internet Solver | US |
| 216.51.130.0/24 | BGP route | AS396443 Western Iowa Networks | — |
| 216.51.130.0/24 | WHOIS (ARIN) | Western Iowa Networks | US |
| 216.51.132.0/24 | WHOIS (ARIN) | Alpine Communications L.C. | US |
| 216.51.134.0/24 | BGP route | AS54374 WMTel | — |
| 216.51.134.0/24 | WHOIS (ARIN) | WMTel | US |
| 216.51.135.0/24 | BGP route | AS62886 OMNITEL COMMUNICATIONS | — |
| 216.51.135.0/24 | WHOIS (ARIN) | OMNITEL COMMUNICATIONS | US |
| 216.51.138.0/24 | BGP route | AS46892 Winnebago Cooperative Telecom Association | — |
| 216.51.138.0/24 | WHOIS (ARIN) | Winnebago Cooperative Telecom Association | US |
| 216.51.139.0/24 | BGP route | AS30325 South Slope Cooperative Telephone Company | — |
| 216.51.139.0/24 | WHOIS (ARIN) | South Slope Cooperative Telephone Company | US |
| 216.51.141.0/24 | WHOIS (ARIN) | NA Tel | US |
| 216.51.144.0/24 | WHOIS (ARIN) | Comm1 | US |
| 216.51.145.0/24 | WHOIS (ARIN) | Premier Communications | US |
| 216.51.146.0/24 | BGP route | AS20273 WCCTA | — |
| 216.51.146.0/24 | WHOIS (ARIN) | WCCTA | US |
| 216.51.150.0/24 | BGP route | AS16612 NEIT Services, LLC | — |
| 216.51.150.0/24 | WHOIS (ARIN) | Northeast Iowa Telephone Company | US |
| 216.51.157.0/24 | BGP route | AS396461 Liberty Communications | — |
| 216.51.157.0/24 | WHOIS (ARIN) | NA Tel | US |
| 216.51.160.0/24 | BGP route | AS62825 Walnut Communications | — |
| 216.51.160.0/24 | WHOIS (ARIN) | Marne & Elk Horn Telephone Company | US |
| 216.51.161.0/24 | WHOIS (ARIN) | Mid Iowa Teleco | US |
| 216.51.165.0/24 | BGP route | AS5056 Aureon Network Services | — |
| 216.51.165.0/24 | WHOIS (ARIN) | Harlan Municipal Utilities | US |
| 216.51.166.0/24 | BGP route | AS19628 Mahaska Communication Group, LLC | — |
| 216.51.166.0/24 | WHOIS (ARIN) | Mahaska Communication Group, LLC | US |
| 216.51.168.0/24 | BGP route | AS11698 WESTERN IOWA TELEPHONE ASSOCIATION (A COOPERATIVE) | — |
| 216.51.168.0/24 | WHOIS (ARIN) | Western Iowa Telephone | US |
| 216.51.170.0/24 | WHOIS (ARIN) | Great Lakes Communications | US |
| 216.51.173.0/24 | BGP route | AS63394 Eastern Iowa IP, LLC | — |
| 216.51.173.0/24 | WHOIS (ARIN) | Eastern Iowa IP, LLC | US |
| 216.51.174.0/24 | BGP route | AS53347 Premier Communications | — |
| 216.51.174.0/24 | WHOIS (ARIN) | MTCNet | US |
| 216.51.175.0/24 | WHOIS (ARIN) | Alpine Communications | US |
| 216.51.176.0/24 | BGP route | AS399559 Alpine Communications L.C. | — |
| 216.51.180.0/24 | BGP route | AS5056 Aureon Network Services | — |
| 216.51.184.0/24 | BGP route | AS18883 FiberNet Communications L.C. | — |
| 216.51.184.0/24 | WHOIS (ARIN) | CML Telephone Cooperative Association | US |
| 216.51.185.0/24 | BGP route | AS402135 Citizens Mutual Telephone Cooperative | — |
| 216.51.185.0/24 | WHOIS (ARIN) | Citizens Mutual Telephone Cooperative | US |
| 216.51.190.0/24 | BGP route | AS399693 Northwest Communications | — |
| 216.51.190.0/24 | WHOIS (ARIN) | Northwest Telephone Coop. Assn. | US |
| 216.51.192.0/24 | BGP route | AS395876 Huxley Communications Cooperative | — |
| 216.51.192.0/24 | WHOIS (ARIN) | Huxley Coop Tel | US |
| 216.51.196.0/24 | BGP route | AS30325 South Slope Cooperative Telephone Company | — |
| 216.51.196.0/24 | WHOIS (ARIN) | South Slope Telephone | US |
| 216.51.199.0/24 | BGP route | AS395876 Huxley Communications Cooperative | — |
| 216.51.199.0/24 | WHOIS (ARIN) | Huxley Cooperative Telephone | US |
| 216.51.200.0/24 | BGP route | AS20273 WCCTA | — |
| 216.51.200.0/24 | WHOIS (ARIN) | Webster Calhoun Telephone Co | US |
| 216.51.202.0/24 | BGP route | AS18883 FiberNet Communications L.C. | — |
| 216.51.202.0/24 | WHOIS (ARIN) | CML Telephone Cooperative Association | US |
| 216.51.203.0/24 | BGP route | AS46154 Farmers Mutual Telephone Company | — |
| 216.51.203.0/24 | WHOIS (ARIN) | Farmers Mutual Telephone Company | US |
| 216.51.207.0/24 | WHOIS (ARIN) | Eastern Iowa IP, LLC | US |
| 216.51.209.0/24 | WHOIS (ARIN) | Internet Solver | US |
| 216.51.212.0/24 | WHOIS (ARIN) | Butler-Bremer Communications | US |
| 216.51.213.0/24 | BGP route | AS5056 Aureon Network Services | — |
| 216.51.213.0/24 | WHOIS (ARIN) | Wellman Cooperative Telephone Association | US |
| 216.51.216.0/24 | WHOIS (ARIN) | Mississippi Bend Area Education Agency | US |
| 216.51.217.0/24 | BGP route | AS397305 FMCTC | — |
| 216.51.217.0/24 | WHOIS (ARIN) | Marne & Elk Horn Telephone Co. | US |
| 216.51.218.0/24 | WHOIS (ARIN) | Peoples Telephone Company | US |
| 216.51.219.0/24 | WHOIS (ARIN) | Eastern Iowa IP, LLC | US |
| 216.51.220.0/24 | BGP route | AS400706 Heart of Iowa Communications Cooperative | — |
| 216.51.220.0/24 | WHOIS (ARIN) | New Providence School | US |
| 216.51.221.0/24 | WHOIS (ARIN) | Heart of Iowa Communications Cooperative | US |
| 216.51.222.0/24 | BGP route | AS402135 Citizens Mutual Telephone Cooperative | — |
| 216.51.222.0/24 | WHOIS (ARIN) | Citizens Mutual Telephone Company | US |
| 216.51.223.0/24 | WHOIS (ARIN) | Webb Wireless | US |
| 216.51.225.0/24 | BGP route | AS30325 South Slope Cooperative Telephone Company | — |
| 216.51.225.0/24 | WHOIS (ARIN) | South Slope Cooperative Telephone | US |
| 216.51.227.0/24 | BGP route | AS30325 South Slope Cooperative Telephone Company | — |
| 216.51.230.0/24 | BGP route | AS397475 F&B Communications, Inc. | — |
| 216.51.231.0/24 | BGP route | AS18883 FiberNet Communications L.C. | — |
| 216.51.233.0/24 | BGP route | AS63394 Eastern Iowa IP, LLC | — |
| 216.51.235.0/24 | BGP route | AS399559 Alpine Communications L.C. | — |
| 216.51.238.0/24 | BGP route | AS63394 Eastern Iowa IP, LLC | — |
| 216.51.239.0/24 | BGP route | AS5056 Aureon Network Services | — |
| 216.51.241.0/24 | BGP route | AS53347 Premier Communications | — |
| 216.51.242.0/24 | BGP route | AS53347 Premier Communications | — |
| 216.51.243.0/24 | BGP route | AS53347 Premier Communications | — |
| 216.51.244.0/24 | BGP route | AS5056 Aureon Network Services | — |
| 216.51.245.0/24 | BGP route | AS5056 Aureon Network Services | — |
| 216.51.248.0/24 | BGP route | AS5056 Aureon Network Services | — |
| 216.51.250.0/24 | BGP route | AS400180 The Farmers Mutual Telephone Company of Stanton, Iowa | — |
| 216.51.251.0/24 | BGP route | AS396878 Spencer Municipal Utilities | — |