AS4637 58.145.192.0/21 CIDR and IP Range Summary.ASN: 4637 - Telstra GlobalHost Count: 2046Addressable IPs: 204858.145.192.0/2458.145.193.0/2458.145.194.0/2458.145.195.0/2458.145.196.0/2458.145.197.0/2458.145.198.0/2458.145.199.0/24