1.73.0.0/16 covers 1.73.0.0 to 1.73.255.255, 65,536 IPv4 addresses. It is announced by AS9605 (NTT DOCOMO, INC.). Every sampled address geolocates to Japan, with 41% in Chiyoda City. 78% of it is registered to an internet service provider. 3% of sampled addresses are flagged as proxy.