AS4503 138.33.80.0/21 CIDR and IP Range Summary.ASN: 4503 - Grady Memorial HospitalHost Count: 2046Addressable IPs: 2048138.33.80.0/24138.33.81.0/24138.33.82.0/24138.33.83.0/24138.33.84.0/24138.33.85.0/24138.33.86.0/24138.33.87.0/24