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.
Promotions should support the site without getting in the way of the answer.
Current Placements
The tool, Field Guide and CLI / API pages show two self-hosted house promotions: Snap Sub above the content, and The Adventures of Penny below it. Policy pages do not display banners. Both links are clearly labeled and open a new tab; neither is a tool result, download requirement or security warning.
No Ad Network Integration
The application does not include AdSense or other ad-network code. House banners do not require an ad click, account or third-party tracking script. We do not publish unmeasured audience or traffic claims.
Future Sponsorship
Any future paid campaign must remain separate from controls and results, work on small screens and keep the tool usable. Third-party scripts or tracking require a privacy and consent review before activation.
Advertising Enquiries
Questions or corrections? Email [email protected]. Please do not send passwords, API keys or sensitive network records.