173.39.128.0/19 covers 173.39.128.0 to 173.39.159.255, 8,192 IPv4 addresses. It is announced by AS109 (Cisco Systems, Inc.). Every sampled address geolocates to Japan, with 100% in Gifu. It is registered to a business. None of the sampled addresses are flagged as VPN, proxy or Tor.