AS7018 12.21.112.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409612.21.112.0/2412.21.113.0/2412.21.114.0/2412.21.115.0/2412.21.116.0/2412.21.117.0/2412.21.118.0/2412.21.119.0/2412.21.120.0/2412.21.121.0/2412.21.122.0/2412.21.123.0/2412.21.124.0/2412.21.125.0/2412.21.126.0/2412.21.127.0/24