Yes, there is. Either you mention an IP address with a netmask such as 127.0.0.0...

		Fnoord on Jan 7, 2019 \| parent \| context \| favorite \| on: Show HN: Mkcert – Valid HTTPS certificates for loc... Yes, there is. Either you mention an IP address with a netmask such as 127.0.0.0 255.0.0.0 or you use CIDR. Mentioning a broadcast address to describe an address space is wrong because it doesn't describe how many bits (netmask and CIDR do that for IPv4).