AS22121 199.21.136.0/21 CIDR and IP Range Summary.ASN: 22121 - Topsham Communications LLCHost Count: 2046Addressable IPs: 2048199.21.136.0/24199.21.137.0/24199.21.138.0/24199.21.139.0/24199.21.140.0/24199.21.141.0/24199.21.142.0/24199.21.143.0/24