201.166.128.0/19 covers 201.166.128.0 to 201.166.159.255, 8,192 IPv4 addresses. It is announced by AS7438 (Telefónica Móviles México, S.A. de C.V.). Every sampled address geolocates to Mexico, with 75% in Cuajimalpa. It is registered to an internet service provider. None of the sampled addresses are flagged as VPN, proxy or Tor.