AS5774 56.0.0.0/12 CIDR and IP Range Summary.ASN: 5774 - United States Postal Service.Host Count: 1048574Addressable IPs: 104857656.0.0.0/1656.1.0.0/1656.2.0.0/1656.3.0.0/1656.4.0.0/1656.5.0.0/1656.6.0.0/1656.7.0.0/1656.8.0.0/1656.9.0.0/1656.10.0.0/1656.11.0.0/1656.12.0.0/1656.13.0.0/1656.14.0.0/1656.15.0.0/16