Man pages matching name nutscan_cidr_to_ip in section 3:

nutscan_cidr_to_ip.3.en	debian 10 / libupsclient-dev
nutscan_cidr_to_ip.3.en	debian 11 / libnutscan-dev
nutscan_cidr_to_ip.3.en	debian 12 / libnutscan-dev