Use IP tools to view your public address, inspect domain IP data, check WHOIS and location signals, and calculate CIDR ranges and subnets.
An IP address is one part of how devices and services communicate, but it is not a complete identity card for a person or organisation. The NetsTool IP category brings several practical checks into one place: What Is My IP, Domain IP Lookup, WHOIS Lookup, IP Location Checker, IP Range Calculator, and IP Subnet Calculator. Together they help you answer questions about the address visible to a website, the address returned for a domain, the registration context around an address, the approximate location associated with it, and the network boundaries described by CIDR notation.
These tools are most useful when their limits are understood. A public IP can be shared by many users behind a router or carrier network. A geolocation provider can identify a city or region incorrectly. WHOIS and RDAP records can be privacy-protected or outdated, and DNS answers can vary by resolver and cache. Treat an IP result as a current observation that needs context, not as proof of ownership, intent, identity, or malicious activity.
What Is My IP shows the public address that the request exposes to the website. That may be an IPv4 address, an IPv6 address, or an address belonging to a VPN, proxy, mobile carrier, office gateway, or cloud service. It is different from a private address such as 192.168.1.20 or 10.0.0.15, which is used inside a local network and is not directly reachable from the public internet in the same way. Knowing which side of the router you are viewing prevents many confusing support conversations.
An address can also change without the device changing. Internet providers reassign dynamic addresses, a VPN can provide a different exit address, and a corporate network can route many people through one gateway. If you are documenting an incident, note the time, timezone, address family, and network context. Avoid publishing a real address unnecessarily, and remember that displaying an address does not grant permission to scan, monitor, or access the system associated with it.
Domain IP Lookup resolves a domain name to the address or addresses returned by its lookup process. A site may have multiple A or AAAA records, use a CDN, return different values in different regions, or place several domains on one shared host. The returned address tells you where a resolver directed the query at that moment; it does not automatically identify the company behind the site or the physical location of its servers.
WHOIS Lookup adds registration context where a public record is available. It may show a registrar, creation date, expiry date, status codes, nameservers, or a privacy service. Many registrants mask personal information, and some IP allocation data is managed through regional internet registries rather than a domain registrar. Compare the record with DNS and the website's own published information. If a field is missing, that may reflect privacy protection or provider limits rather than evidence that the domain is fraudulent.
IP Location Checker uses external data sources to estimate a country, region, city, provider, ASN, or related signal. Geolocation is generally useful for broad operational context, such as identifying an unexpected hosting region or checking whether a service appears to be using a known network. It is not a reliable way to find a person's home, prove where a visitor was standing, or make a legal conclusion about an individual.
Different databases can disagree because they update at different times and map addresses at different levels of precision. Mobile networks, VPNs, proxies, cloud hosts, and privacy services make the estimate less direct. When a result matters, compare more than one signal and record the lookup time. Do not use a location estimate to harass, profile, or expose someone. It is a technical clue for authorised troubleshooting, not a personal identification service.
IP Range Calculator and IP Subnet Calculator help translate between an address, a subnet mask, and CIDR notation. A calculation can show the network address, broadcast address where applicable, usable host range, prefix length, and number of addresses. This is useful for planning a VLAN, checking a firewall rule, reviewing a DHCP scope, or explaining why an address falls outside a proposed network. IPv4 and IPv6 have different conventions, so confirm which address family you are calculating.
Numbers still need a human decision. A /24 is not automatically the right size for every office, and a range that fits today may not fit future services. Small prefixes such as /31 and /32 have special operational meanings, while network and broadcast handling can vary by design. Copy the result into your network documentation, check it against the router or cloud provider, and test the rule in an authorised environment. A calculator reduces arithmetic mistakes; it does not design a secure network for you.
Lookup tools may send a domain, IP address, or related request to an external provider so a current response can be returned. The result may be cached, incomplete, rate-limited, or temporarily unavailable. NetsTool does not promise that a provider's record is permanent or that every lookup source agrees. Read the result, note its source where shown, and use a trusted authoritative record when a change to production, security, or compliance depends on the answer.
Use IP tools only for addresses and systems you own or are authorised to investigate. Do not turn a lookup into an attempt to bypass access controls, scan a stranger's infrastructure, or collect personal information. A clear record of the input, timestamp, result, and reason for the check makes troubleshooting more defensible. The category is valuable because it combines practical observations with reminders about uncertainty, permission, and the difference between a network signal and a conclusion. A useful report separates facts from assumptions: state the address or domain checked, the provider response, the timestamp, and the reason for the lookup. If several sources disagree, record that disagreement instead of selecting the most convenient answer. This habit helps support teams reproduce a problem and helps security teams avoid treating an approximate location or registration field as proof of intent. Good IP research is careful, limited, and easy for another authorised person to review.