AS3257 64.20.0.0/20 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 4094Addressable IPs: 409664.20.0.0/2464.20.1.0/2464.20.2.0/2464.20.3.0/2464.20.4.0/2464.20.5.0/2464.20.6.0/2464.20.7.0/2464.20.8.0/2464.20.9.0/2464.20.10.0/2464.20.11.0/2464.20.12.0/2464.20.13.0/2464.20.14.0/2464.20.15.0/24