5.142.0.0/16 covers 5.142.0.0 to 5.142.255.255, 65,536 IPv4 addresses. It is announced by AS12389 (PJSC Rostelecom). Every sampled address geolocates to Russia, with 25% in Arkhangel'sk. 97% of it is registered to an internet service provider. 3% of sampled addresses are flagged as proxy.