olemus
IP-aadresside vahemik,
tavaliselt kuulub üheleainsale organisatsioonile

Wiktionary:
(Internet) a block of IP addresses

ülevaateid
https://serverfault.com/questions/799143/whats-the-difference-between-a-subnet-and-a-netblock

https://ipinfo.io/faq/article/74-what-is-an-ip-netblock-how-to-find-netblock-owner

https://www.whoisxmlapi.com/blog/how-to-find-a-netblock-owner-with-an-ip-netblocks-whois-database/?print=pdf