nullcase.dev
nullcase.dev is a live English-language website hosted on Cloudflare, Inc. (AS13335) in the United States, served by Cloudflare. cl0q first saw it on 2026-09-08 and last crawled it on 2026-09-08. It resolves to 172.67.222.67 and has mail (MX) records set up. Its favicon is fingerprinted by SHA-256, so you can find every other site that serves the same icon.
How the site describes itself:
Nullcase — Stop failing on edge cases
The coding interview simulator that actually runs your code. Get real interviewer feedback, hidden test cases, and a scored debrief — no memorization required.
| Status | 200 OK — live & indexed by cl0q |
|---|---|
| First seen | 2026-09-08 |
| Last crawled | 2026-09-08 |
| IPv4 | 172.67.222.67 |
| IPv6 | 2606:4700:3032::6815:266f |
| Network | AS13335 Cloudflare, Inc. · United States |
| Mail (MX) | eforward3.registrar-servers.com,eforward1.registrar-servers.com,eforward2.registrar-servers.com,eforward4.registrar-servers.com,eforward5.registrar-servers.com |
| Language | en |
| Server | cloudflare |