1.66.112.0/20 covers 1.66.112.0 to 1.66.127.255, 4,096 IPv4 addresses. It is announced by AS9605 (NTT DOCOMO, INC.). Every sampled address geolocates to Japan, with 50% in Chiyoda City. It is registered to an internet service provider. None of the sampled addresses are flagged as VPN, proxy or Tor.