Browser-based networking helpers for CIDR, subnets, IP ranges, DNS notes, and common ports.
Enter an IPv4 CIDR like 10.10.2.0/24.
This uses your browser to ask public IP services. It may show your Cloudflare/VPN/provider path.
Browser JavaScript cannot do raw DNS lookups directly, but these commands can be copied into Linux or Windows.
Quick reference for common services.
| Port | Service | Notes |
|---|---|---|
| 22 | SSH | Remote shell |
| 53 | DNS | UDP/TCP DNS |
| 80 | HTTP | Web traffic |
| 443 | HTTPS | Secure web traffic |
| 5060 | SIP | VoIP signaling |
| 51820 | WireGuard | Default WireGuard UDP |
| 8006 | Proxmox | Web GUI |
| 8080 | Alt HTTP | Apps, panels, dev servers |
The CIDR calculator runs locally in your browser. Public IP checks contact external public-IP services. DNS commands are generated locally and are not executed by Ventaxia.