03 · Network Tools
Network Tools
Every tool works without an account and delivers instant results. API-ready and CLI-friendly for professionals.
HOT
01
IP Address Location Lookup
Enter an IP address to instantly see country, city, region, ISP and coordinates on a map — find the location of your IP or any other IPv4/IPv6 address.
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HOT
02
Speed Test
Test your internet speed – measure download, upload and ping for free.
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03
Port Scanner
Scan open ports on your IP address – check which services are accessible from the outside.
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HOT
04
Blacklist Check
Check if your IP address is on spam blacklists – 18 active DNSBL databases with reason and delisting link.
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05
Whois Lookup
Query Whois information for domains and IP addresses – registrar, owner and nameservers.
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06
IPv6 Test
Test whether your internet connection supports IPv6 and if your IPv6 address is working correctly.
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07
SSL Check
Check the SSL/TLS certificate of a website – validity, issuer and encryption.
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08
HTTP Header Check Online
Inspect HTTP and security headers of any website — Content-Security-Policy, HSTS, X-Frame-Options, server info and caching at a glance.
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09
Email Authentication Check — SPF, DKIM & DMARC
Check whether your domain has a valid SPF, DKIM and DMARC setup. With an overall grade, concrete recommendations and copy-paste-ready DNS records — free, no signup.
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10
Subnet Calculator
Calculate IP subnets – netmask, broadcast, host range and CIDR notation.
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11
DNS Lookup
Query all DNS records of any domain – nameservers, A, AAAA, MX, TXT, CNAME and SOA records at a glance.
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12
DNS Propagation Check
Compare the authoritative nameservers against five public resolvers – including the TTL of each resolver.
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13
Reverse DNS Lookup
Check the PTR record and forward-confirmed rDNS – the prerequisite for large providers accepting your mail.
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14
What does this site know about you?
Full self-audit: what your browser, IP, device and network reveal to every website — IP location, hardware, screen, language, time zone, WebRTC leak, canvas fingerprint and more.
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Free IP Widget for Your Website
Embed an iframe, JS snippet or SVG badge that shows visitor IP, location and ISP — no signup, no API key required.
Embed Widget →
11 Free Tools
Fully browser-based, no account, no limits.
GDPR Compliant
Hosted in Switzerland, no profiles, no tracking.
No Registration
Monetised via transparent affiliates, no AdSense.
home.trust_api
REST · JSON · no API key — use directly.
04 · Guides
Guides & Knowledge
Over 25 articles on DNS, SSL, VPN, IPv6, mail servers. No marketing fluff.
FAQ