AS3257 204.237.192.0/21 CIDR and IP Range Summary.ASN: 3257 - GTT Communications Inc.Host Count: 2046Addressable IPs: 2048204.237.192.0/24204.237.193.0/24204.237.194.0/24204.237.195.0/24204.237.196.0/24204.237.197.0/24204.237.198.0/24204.237.199.0/24