AS18780 173.0.16.0/20 CIDR and IP Range Summary.ASN: 18780 - Reservation Telephone Coop.Host Count: 4094Addressable IPs: 4096173.0.16.0/24173.0.17.0/24173.0.18.0/24173.0.19.0/24173.0.20.0/24173.0.21.0/24173.0.22.0/24173.0.23.0/24173.0.24.0/24173.0.25.0/24173.0.26.0/24173.0.27.0/24173.0.28.0/24173.0.29.0/24173.0.30.0/24173.0.31.0/24