AS133919 203.158.232.0/21 CIDR and IP Range Summary.ASN: 133919 - University Campus Network Rajamangala University of Technology Phra NakhonHost Count: 2046Addressable IPs: 2048203.158.232.0/24203.158.233.0/24203.158.234.0/24203.158.235.0/24203.158.236.0/24203.158.237.0/24203.158.238.0/24203.158.239.0/24