AS3257 66.253.0.0/20 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 4094Addressable IPs: 409666.253.0.0/2466.253.1.0/2466.253.2.0/2466.253.3.0/2466.253.4.0/2466.253.5.0/2466.253.6.0/2466.253.7.0/2466.253.8.0/2466.253.9.0/2466.253.10.0/2466.253.11.0/2466.253.12.0/2466.253.13.0/2466.253.14.0/2466.253.15.0/24