1.72.192.0/18 covers 1.72.192.0 to 1.72.255.255, 16,384 IPv4 addresses. It is announced by AS9605 (NTT DOCOMO, INC.). Every sampled address geolocates to Japan, with 63% in Tokyo. It is registered to an internet service provider. None of the sampled addresses are flagged as VPN, proxy or Tor.