// IP Subnet Calculator
Calculate network address, broadcast, host range and usable hosts instantly
Network Address
Subnet Mask
CIDR Notation
Wildcard Mask
Default Gateway
First Usable Host
Last Usable Host
Broadcast Address
Usable Hosts
IP Class
IP Type
Enter an IP address, select a subnet mask, then hit Calculate.
// VLAN Subnet Planner
Divide a base network into equal-sized VLAN subnets
Subnets are allocated sequentially. Prefix length is chosen to fit all VLANs with equal host counts.
// CIDR Aggregator
Paste a list of networks — collapse into the fewest possible supernets
One CIDR per line, or comma-separated. Overlapping and adjacent subnets are automatically merged.
// Port Lookup
Enter port numbers or ranges — instantly matched against a built-in service database
Try: 22 | 80, 443 | 3306, 5432 | 1-1024
// Service → Port Lookup
Enter service or protocol names — matched against a built-in database
Try: sftp | kerberos, ldap | rdp, smb | dns, ntp
// DNS Lookup
Query all DNS record types via Cloudflare — no API key required
Queries A, AAAA, MX, NS, TXT, CNAME and SOA records simultaneously via Cloudflare DNS over HTTPS.
// SSL Certificate Checker
Check issued certificates from Certificate Transparency logs — no API key required
Checking certificate transparency logs...
Data from crt.sh (Certificate Transparency). Shows issued certs, not necessarily the currently deployed one.
// IP Geolocation
Look up location, ISP and ASN for any IP — no API key required
Fetching geolocation data...
Powered by ipapi.co — free tier: 1,000 lookups/day, no key needed.
// WHOIS / ASN Lookup
Enter a domain, IP address, or ASN (e.g. AS15169)
Fetching WHOIS / BGP data...
Domains → HackerTarget WHOIS · IPs / ASNs → BGPView (100 free req/day).
// Firewall Rule Generator
Select a scenario — generates production-ready rules for your chosen firewall syntax
// Firewall Rule Analyzer
Paste your existing rules — parses and displays them as a structured table
// Netplan Configuration Generator
Fill in your interfaces — generates a production-ready netplan YAML
INTERFACES
GENERATED NETPLAN YAML — save as /etc/netplan/01-config.yaml
SSH Config
WireGuard
OpenVPN
// SSH Config Generator
Build a ~/.ssh/config file from your host entries
HOSTS
Add the output to ~/.ssh/config. Multiple entries can exist in the same file.
// WireGuard Config Generator
Generate server + client WireGuard configs with PostUp NAT rules
Keys are placeholders — generate real keys with: wg genkey | tee private.key | wg pubkey > public.key
// OpenVPN Config Generator
Generate server.conf + portable client.ovpn with inline certificate placeholders
PKI / certificates must be generated separately with Easy-RSA. See the setup guide in the generated output.
// PowerShell Command Reference
Searchable database of common PowerShell cmdlets with examples — no AI required