Meet your coaches
Talk through the problem while you code. Guest text is free. Hosted voice is the Own Words Pack.
Start Part 1 to unlock your next challenge
IPv4 Iterators and CIDR
Also known as: IP to CIDR
Build practical IPv4 primitives: forward/reverse iterators, CIDR range expansion, and (finally) covering N sequential IPs with minimum CIDR blocks. This tests bitwise thinking, boundary discipline, and writing clear stateful code.
Chat with Fin or Coco right now on mobile.
Start talking through the problem here. Switch to desktop when you're ready to code and run tests.
Start coaching sessionMeet your coaches
Talk through the problem while you code. Guest text is free. Hosted voice is the Own Words Pack.
Start a coached rep now. Guest text is free. Sign in if you want this work on another device.
Email me this coached-rep link
Start Part 1 to unlock your next challenge
Code + tests need a desktop
Chat works on this phone. Email yourself a link when you want the editor and tests.