AS393474 64.90.136.0/21 CIDR and IP Range Summary.ASN: 393474 - St. Clair County Regional Educational Service AgencyHost Count: 2046Addressable IPs: 204864.90.136.0/2464.90.137.0/2464.90.138.0/2464.90.139.0/2464.90.140.0/2464.90.141.0/2464.90.142.0/2464.90.143.0/24