subnetmask.tech
subnetmask.tech is a live English-language website hosted on Cloudflare, Inc. (AS13335) in the United States, served by Cloudflare. cl0q first saw it on 2026-08-05 and last crawled it on 2026-08-07. It resolves to 104.21.12.2 and has mail (MX) records set up.
How the site describes itself:
Advanced IPv4 CIDR Calculator & Subnet Splitter | Subnetmask.tech
Free online IPv4 subnet calculator and CIDR tool. Instantly compute network addresses, broadcast addresses, subnet masks, wildcard masks, usable host ranges, and binary breakdowns. Trusted by network architects and CCNA engineers.
| Status | 200 OK — live & indexed by cl0q |
|---|---|
| First seen | 2026-08-05 |
| Last crawled | 2026-08-07 |
| IPv4 | 104.21.12.2 |
| IPv6 | 2606:4700:3031::ac43:96e5 |
| Network | AS13335 Cloudflare, Inc. · United States |
| Mail (MX) | route2.mx.cloudflare.net,route1.mx.cloudflare.net,route3.mx.cloudflare.net |
| Language | en |
| Server | cloudflare |