Ipv4
- How I plan a small IPv4 subnet without doing binary math in my head
A subnet is a range of IP addresses. CIDR notation like 192.168.1.0/24 describes the size of that range. The IPv4 Subnet Calculator tool gives me a safe place to test the idea before I put it into a script, server, or …
- How I turn an IPv4 range into CIDR blocks
Many firewalls and cloud tools want CIDR blocks, but humans often receive IP ranges with a start and end address. The IPv4 Range Expander tool helps me inspect the input and output without writing a one-off script first.