Man pages matching name rgxg_net_cidr_string in section 3:

rgxg_net_cidr_string.3.en	debian 10 / librgxg-dev
rgxg_net_cidr_string.3.en	debian 11 / librgxg-dev
rgxg_net_cidr_string.3.en	debian 12 / librgxg-dev