AS11584 64.251.40.0/21 CIDR and IP Range Summary.ASN: 11584 - New York City Health & Hospitals CorporationHost Count: 2046Addressable IPs: 204864.251.40.0/2464.251.41.0/2464.251.42.0/2464.251.43.0/2464.251.44.0/2464.251.45.0/2464.251.46.0/2464.251.47.0/24