AS12389 37.72.176.0/21 CIDR and IP Range Summary.ASN: 12389 - PJSC RostelecomHost Count: 2046Addressable IPs: 204837.72.176.0/2437.72.177.0/2437.72.178.0/2437.72.179.0/2437.72.180.0/2437.72.181.0/2437.72.182.0/2437.72.183.0/24