5.26.0.0/16 covers 5.26.0.0 to 5.26.255.255, 65,536 IPv4 addresses. It is announced by AS16135 (Turkcell Iletisim Hizmetleri A.S.). Every sampled address geolocates to Turkey, with 94% in Istanbul. It is registered to an internet service provider. None of the sampled addresses are flagged as VPN, proxy or Tor.