Alergic on "[Plugin: Wordfence Security] Add CIDR instead of just IP range whitelist?"

Hi !
I converted this CIDR range 199.27.128.0/21 from Cloudflare to: 199.27.128.0 - 199.27.135.255
I just tried the formula below, and Wordfence accepted it. Does it really work ?
199.27.[128-135].[0-255]