AS21054 155.136.48.0/21 CIDR and IP Range Summary.ASN: 21054 - Natwest Markets PLCHost Count: 2046Addressable IPs: 2048155.136.48.0/24155.136.49.0/24155.136.50.0/24155.136.51.0/24155.136.52.0/24155.136.53.0/24155.136.54.0/24155.136.55.0/24