AS23 129.166.16.0/20 CIDR and IP Range Summary.ASN: 23 - National Aeronautics and Space AdministrationHost Count: 4094Addressable IPs: 4096129.166.16.0/24129.166.17.0/24129.166.18.0/24129.166.19.0/24129.166.20.0/24129.166.21.0/24129.166.22.0/24129.166.23.0/24129.166.24.0/24129.166.25.0/24129.166.26.0/24129.166.27.0/24129.166.28.0/24129.166.29.0/24129.166.30.0/24129.166.31.0/24