4.159.0.0/16 covers 4.159.0.0 to 4.159.255.255, 65,536 IPv4 addresses. It is announced by AS8075 (Microsoft Corporation). Every sampled address geolocates to United Kingdom, with 100% in London. It is registered to a hosting or cloud provider. None of the sampled addresses are flagged as VPN, proxy or Tor.