orbitnet.ru
Home /Tools /Networks

Free Online Network Tools

Diagnose connections, plan subnets and audit websites with a growing set of free network tools. Everything runs in your browser or through a single request to our API — no accounts, no ads and no tracking.

IPv4 Subnet Calculator

Calculate network and broadcast addresses, CIDR range, usable hosts and subnet mask.

IPv6 Subnet Calculator

Calculate an IPv6 network range, prefix, address count and address type.

CIDR / Netmask Converter

Convert between CIDR prefix, subnet mask and wildcard mask, with a full prefix reference.

IP / Binary Converter

Convert IPv4 addresses to binary, decimal and hexadecimal, and back again.

IPv6 Converter

Compress, expand and inspect IPv6 addresses in hex, decimal, binary and reverse DNS.

MAC Address Converter

Convert MAC addresses between formats and inspect their address type and OUI prefix.

IP Lookup

Discover your public IP address with its approximate location, network provider and reverse DNS — resolved on our own server.

IP & Domain Info

Look up DNS records, reverse DNS, whois registration data plus geolocation and provider for any IP or domain.

Reverse IP Lookup

Find the PTR hostname behind an IP address, resolved by our own server.

DNS Lookup

Query A, AAAA, MX, TXT, NS, CNAME, SOA and CAA records for any domain.

DNS Propagation Checker

Compare answers from several public resolvers to see whether a record change has propagated.

DNSSEC Checker

Check DS, DNSKEY and RRSIG records and classify a domain as Secure, Insecure, Bogus or Indeterminate.

Email DNS Checker

Check MX, SPF, DMARC, DKIM and PTR records for a domain.

Email Deliverability Check

Analyse MX, SPF, DMARC and DKIM and explain common email configuration mistakes.

Port Checker

Check whether a TCP port is open on a host, straight from our server.

Network Diagnostics

Forward and reverse DNS plus a TCP port check in a single page.

Site Info

Inspect a website: resolved IP, HTTP status, server, page title and response time.

HTTP Headers Inspector

Response status and headers, including HSTS, CSP and other security headers, with warnings.

SSL/TLS Checker

Certificate, chain, SANs plus deep scan: TLS versions, cipher suites, OCSP stapling and CAA records.

Redirect Checker

Follow the redirect chain, showing every HTTP status code and the final URL.

Website Health Check

One report combining DNS, TLS, reachability and HTTP security headers.

Website Security Audit

Grade a site A–F on HTTPS, security headers, HSTS preload, security.txt, cookie flags and mixed content.

Spam Blacklist Check

Test an IP, domain or email against public DNSBL and URIBL spam databases.

Anonymity Check

Inspect proxy headers, Tor and hosting signals, timezone mismatch, WebRTC leaks and optional port checks for your own IP.

Subnets and IP addresses

Plan IPv4 and IPv6 networks, convert CIDR prefixes and netmasks, and switch between binary, decimal and hexadecimal address formats.

DNS, email and domains

Look up DNS records, trace propagation across public resolvers, inspect email authentication records (SPF, DMARC, DKIM) and validate DNSSEC.

Website and security checks

Check SSL/TLS certificates, HTTP headers, redirect chains, open ports and blacklist status, or run a single audit covering the most common hardening issues.