What is this?
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.
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.
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.
FAQ
- 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.
- 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.
- 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.