203.43.0.0/16 covers 203.43.0.0 to 203.43.255.255, 65,536 IPv4 addresses. It is announced by AS1221 (Telstra Limited). Every sampled address geolocates to Australia, with 81% in Melbourne. It is registered to an internet service provider. None of the sampled addresses are flagged as VPN, proxy or Tor.