AS21730 204.73.192.0/21 CIDR and IP Range Summary.ASN: 21730 - Halstad Telephone CompanyHost Count: 2046Addressable IPs: 2048204.73.192.0/24204.73.193.0/24204.73.194.0/24204.73.195.0/24204.73.196.0/24204.73.197.0/24204.73.198.0/24204.73.199.0/24