AS7018 63.199.72.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204863.199.72.0/2463.199.73.0/2463.199.74.0/2463.199.75.0/2463.199.76.0/2463.199.77.0/2463.199.78.0/2463.199.79.0/24