AS397364 38.66.136.0/21 CIDR and IP Range Summary.ASN: 397364 - Doctors without Borders USA Inc.Host Count: 2046Addressable IPs: 204838.66.136.0/2438.66.137.0/2438.66.138.0/2438.66.139.0/2438.66.140.0/2438.66.141.0/2438.66.142.0/2438.66.143.0/24