AS21565 66.153.189.168/29 CIDR and IP Range Summary.ASN: 21565 - Horry Telephone Cooperative Inc.Host Count: 6Addressable IPs: 8 66.153.189.16966.153.189.17066.153.189.17166.153.189.17266.153.189.17366.153.189.17466.153.189.17566.153.189.176