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 →
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