IP Lookup
Look up registration, routing, cloud, reverse DNS and approximate location data for an IP.
The IP address you enter (or your own, via the "My IP" shortcut) is sent to the Nexinon server at lookup time — used to query RDAP, Team Cymru, the cloud-provider range lists and the local geolocation database, then discarded. Nothing is stored.
What RDAP is (and isn't)
RDAP (Registration Data Access Protocol, RFC 9082/9083) is the same protocol this platform's WHOIS tool uses, here querying who registered the IP BLOCK instead of a domain — holding organization, abuse contact, registration dates. RDAP never reports geolocation or who's currently announcing the IP's route: those are completely different sources (see the two sections below). The country RDAP shows is the block's REGISTRANT country — it can differ from where the IP is actually used, especially for large providers' blocks.
What IP geolocation is not
IP geolocation is always an estimate based on the block the address is registered under, never a device's exact position — unlike a phone's GPS. For mobile carrier and VPN/hosting-provider blocks, the error can reach hundreds of kilometers (the "accuracy radius" shown tries to communicate that uncertainty, when the source reports one). This tool uses MaxMind's free GeoLite2 database, self-hosted by Nexinon — no call to any third-party service per lookup.
Registration vs. routing — why the ASN can differ from the registrant
"Who registered the block" (RDAP) and "who's announcing that IP on the internet right now" (BGP routing) are different questions, and sometimes have different answers — for example, an IP block leased by one company to another. This tool fetches the live routing ASN via Team Cymru (a public query against the actual BGP table state); when that source is unavailable, it falls back to a registration snapshot (MaxMind's GeoLite2 database), explicitly flagged as such — never presented as if it were the live route.
"What's my IP"
The browser never truly knows its own public IP — only the server receiving the connection can see the address it arrived from. The "My IP" button uses exactly that: Nexinon returns the source IP of your own request and runs the same full lookup on it.
Frequently asked questions
Either the regional registry's (RIR) RDAP server responsible for that block is temporarily down, or (rarer) the block doesn't have a known entry in IANA's official bootstrap yet. The tool never guesses — it shows the data as unavailable instead of making anything up.
RDAP shows the IP block's REGISTRANT country (who registered it), not necessarily where the server is physically located. Large cloud providers often register whole blocks under a single country and then operate data centers in several others — geolocation (a separate group) is what tries to answer "where physically", with the caveat of always being an estimate.
Everything shown is already public by nature — RDAP registration, BGP routing and cloud-provider ranges are officially published by IANA/RIRs/Team Cymru/AWS/GCP/Cloudflare; anyone can query the same sources directly. Nexinon never retains the looked-up IP in any database (see the execution notice, above).
If you're behind a VPN, a corporate proxy or your provider's CGNAT, different IPs can show up depending on which server is receiving the connection at that moment — neither is "wrong", they're just different exit points of your connection.
It means Team Cymru (the primary source, live BGP table) didn't respond in time — the tool falls back to the GeoLite2-ASN database, a registration snapshot that may be slightly out of date compared to the real route right now. Always explicitly flagged, never mixed in without a notice.
Only when the IP falls inside one of the ranges officially published by AWS, Google Cloud or Cloudflare — covering the vast majority of real-world cases for those three. Azure is left out of this version: unlike the other three, Microsoft doesn't publish a fixed URL for its range list (it changes on every weekly update), which would make automatic detection fragile.