Free network tools

The IT tech's toolbox — IP, DNS, mail, WHOIS, SSL, hashing, speed, SNMP and more. Every tool runs in your browser. No sign-up, no data sent to us, nothing for bots to hammer.

IP & location

🛰️ Find your real IP live

See your true public IP — even behind a VPN or proxy like Zscaler. WebRTC leak detection exposes what your network really shows the world.

📍 IP address lookup live

Geolocation, ASN, ISP and organization for any IPv4 or IPv6 address.

DNS

🧭 Is it DNS? live

One click tells you whether DNS is your problem — checks public resolvers, your local DNS, and whether the big providers are reachable.

🔎 DNS lookup live

Enter any domain and see what Cloudflare, Google, DNS.SB and AliDNS each return — side by side. Spot propagation lag, GeoDNS, and outages.

↩️ Reverse DNS (PTR) live

Look up the hostname behind any IP address — IPv4 and IPv6.

📧 MX lookup live

Find a domain's mail servers, detect the provider (Google/M365/Proofpoint) and check SPF.

WHOIS & ownership

🪪 Domain WHOIS live

Registrar, registration & expiry dates, status flags and nameservers for any domain.

🌐 ASN lookup live

Who owns an autonomous system — org, registry, and registration history.

🚫 IP blacklist check live

Is an IP listed on the major DNSBLs (Spamhaus, SpamCop, Barracuda and more)?

🏷️ MAC address lookup live

Find the manufacturer behind any MAC from the full IEEE OUI registry — detects randomized MACs too.

Security & certificates

🔐 SSL certificate checker live

Issuer, expiry, days remaining and covered hostnames for any domain, from the CT logs.

🦠 Virus / file reputation live

Hash a file locally (never uploaded) and check its fingerprint against VirusTotal & MalwareBazaar.

#️⃣ Hash generator live

MD5, SHA-1, SHA-256, SHA-512 of any text or file — computed in your browser.

Speed & latency

⚡ Speed test live

Download, upload, latency and jitter against Cloudflare's global edge.

📡 Ping test live

Latency and jitter to Cloudflare, Google, Amazon and Microsoft — side by side.

Calculators & SNMP

🧮 Subnet / CIDR calculator live

Network, broadcast, mask, host ranges and counts — instantly, in your browser.

🔢 SNMP OID lookup live

Decode any SNMP OID arc-by-arc and identify the vendor — built for network engineers.

🎲 Random IP generator live

Generate random public, private or IPv6 addresses for testing.

These tools show you a snapshot. Acutis Go watches all the time.

Free agent for your computer — tells you instantly whether a problem is your machine, your network, or the internet. Download Acutis Go →