AS21353 188.133.152.0/21 CIDR and IP Range Summary.ASN: 21353 - JSC ER-Telecom HoldingHost Count: 2046Addressable IPs: 2048188.133.152.0/24188.133.153.0/24188.133.154.0/24188.133.155.0/24188.133.156.0/24188.133.157.0/24188.133.158.0/24188.133.159.0/24