ipaddress.pt answers a simple question — what is my IP address? — and then keeps going: which network you are on, who operates it, how it is routed, how its names resolve and what that says about your connection. It is written first in European Portuguese, for people using the internet in Portugal, and works for addresses anywhere in the world. This is its English edition.
What we believe
Real data, our own copy. Every value on this site comes from your own connection or from a named source. We download the global BGP routing table, the regional internet registries’ allocation records (the RIPE NCC for Portugal), the RPKI, the DB-IP geolocation dataset, GeoNames and the Tor exit list ourselves and rebuild our indexes on a schedule: daily for routing and registry data, every few hours for RPKI, every few days for location. Registration records and DNS answers are queried live from the registries and name servers themselves. If a source has no answer, we say so instead of guessing.
Honest about limits. IP geolocation is an estimate, network types are inferred from operator names, and registration records can be out of date. An address registered to a Portuguese organisation is not necessarily used in Portugal, and the reverse. We label each of those and explain them on How it works and on Portugal in numbers.
Private by default. Lookups of your address run on our own server against our own datasets — no third-party IP intelligence service sees them. We don’t log visitor IP addresses, keep a history of lookups or use tracking cookies.
Useful for professionals, readable for everyone. The CIDR, subnet, DNS, WHOIS and ASN tools are built for network engineers; the guides are written for anyone curious about how the internet works.
Languages
European Portuguese is the site’s primary language; this English edition is written separately for international visitors. The Spanish, French, German and Turkish versions were translated with machine assistance and say so on every page until a person has reviewed them. Where a text does not exist in a language yet, we show the original and say so — an untranslated page is never presented as translated.
Free, without an account
Everything here works without registration. The site may show a small number of clearly labelled advertisements to cover running costs; they never get in the way of showing your address.
Get in touch
Found a mistake, have a data correction or a feature idea? Use the contact form.