Network, mask, broadcast and usable range. Calculated on your device. The starting /24 is illustrative, not your detected network; IPv6 connections use a documentation IPv4 example.
Supports /0 through /32, including point-to-point /31 networks.
Get to Know an Address.
Check IPv4 or IPv6 format, address scope and reverse DNS.
Use
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More than a string of numbers.Inspect an address to see its structure.
Address scope does not establish ownership or reachability. IPv4 vs IPv6 ↗
40 requests / minuteOne rolling allowance per source IP across the site.
30 DNS lookups / minuteDNS and reverse DNS share this budget within the total.
Your provider may assign addresses dynamically. Switching Wi-Fi, mobile networks, VPN endpoints or IP protocols can change the address a service sees.
Can an IP address tell someone where I live?
Not precisely. IP location databases are approximate and can describe a provider’s network rather than your device. ABOUTIP does not request GPS location. The time zone above comes from your browser.
Does the subnet calculator detect my network?
No. The starting prefix is an example, not a measured network mask. Enter the IPv4 address and prefix you actually want to calculate. The calculation runs locally in your browser.
Can I use ABOUTIP in a script?
Yes. Use the CLI / API guide. The overall allowance is 40 requests per source IP in a rolling 60 seconds. Pages and API requests share it; DNS and reverse DNS have an additional shared lookup budget.
You should not need an account to check an IP address.
Connection Information
A request reveals a source IP address and request headers to the infrastructure serving it. ABOUTIP uses the observed address to display your public IP and apply temporary request limits in application memory. Responses are marked no-store. The browser time zone is read in your browser; it is not GPS or IP-derived location.
Tools and Queries
DNS lookups and optional reverse-DNS queries are sent by our server to Cloudflare’s public DNS resolver. The submitted name or reverse lookup address is included; the application does not add your visitor IP to that upstream query. IP inspection processes the address you enter on our server. Subnet calculations run locally in your browser.
Temporary Limits and Infrastructure
The overall request allowance tracks recent activity in a rolling 60-second window. Expired entries are cleared periodically; separate lookup entries are cleared after inactivity. Cloudflare provides proxy, DNS and security services, and OVHcloud hosts the application. Their operational and security processing may include connection information under their own policies. These application-level statements do not describe every log or setting held by an infrastructure provider.
House Promotions
Tool, Field Guide and CLI / API pages display labeled image links for Snap Sub and The Adventures of Penny. The images are served from this site. The application adds no ad-network scripts, tracking pixels, analytics SDKs or advertising cookies. Clicking a promotion opens the destination in a new tab; that site applies its own privacy practices. Future third-party advertising or analytics requires a review of this notice and any applicable consent controls before launch.
Contact
If you email support, your email address and the information you provide are used to respond to your request. Avoid including sensitive data.
Questions or corrections? Email [email protected]. Please do not send passwords, API keys or sensitive network records.