Subnet Sprint — timed subnet / CIDR speed challenge | IPOK<br>Skip to content<br>#34 · today<br>Subnet Sprint<br>Timed subnet / CIDR sprint · fast + correct = high score
10 timed subnet questions. Correct answers score; faster = more. A fresh set daily — same puzzle for everyone.<br>Start today's sprintPractice (play anytime)Practice isn't ranked — random questions, play as much as you like.<br>🏆 Today's leaderboard<br>Global leaderboard activates after deploy.
Tip: keys 1–4 / arrows to answer fast
What is this?<br>Subnet Sprint is a timed mini-game by IPOK: 10 subnet / CIDR questions where answering fast AND correctly scores highest. It's built for network engineers, CCNA students, interview prep, and anyone who works with data-center IP blocks and firewalls.<br>It borrows Wordle's three-piece formula: ① a fresh daily set, same puzzle worldwide; ② a global speed leaderboard; ③ an emoji result grid you copy and share in one tap. All judging runs locally in your browser — nothing uploaded, no LLM calls.<br>Why drill subnetting? Carving VLANs, writing ACLs, picking data-center IP ranges, reading BGP announcements — all of it rides on instantly computing network / broadcast addresses and usable host counts. Turn it into muscle memory and you debug faster.<br>FAQ<br>How is the daily puzzle the same for everyone?The day's date seeds a generator that builds the questions locally in your browser — same day, same puzzle number, identical questions and answers for everyone, which is what makes the leaderboard fair.<br>Is my gameplay uploaded?Judging happens entirely in your browser. Only when you tap Submit to leaderboard do your name, score and time get sent for ranking — nothing else.<br>How does this relate to the IPOK main site?Subnet Sprint is a mini-game by IPOK, a multi-source IP purity / risk checker that tells you whether your IP is native, blocklisted, and how clean its /24 neighbors are.<br>← Back to IPOK — check my IP