What network is WIVB?

Excuse me, could you please clarify what network WIVB belongs to? I'm not entirely familiar with the specifics of this particular entity, so I'm curious to know if it's a television station, a radio station, or perhaps something else entirely. Is it a local, regional, or national network? Additionally, if you could provide any information about its programming or target audience, that would be greatly appreciated. Thank you for your time.