AS3257 135.196.128.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 2048135.196.128.0/24135.196.129.0/24135.196.130.0/24135.196.131.0/24135.196.132.0/24135.196.133.0/24135.196.134.0/24135.196.135.0/24