221.198.0.0/16 covers 221.198.0.0 to 221.198.255.255, 65,536 IPv4 addresses. It is announced by AS4837 (China Unicom). Every sampled address geolocates to China, with 84% in Tianjin. It is registered to an internet service provider. None of the sampled addresses are flagged as VPN, proxy or Tor.