RIPE Database lookup

Which network does an IP address belong to, and which autonomous system (AS) announces it? Enter an IP address, a prefix or an AS number and we will show you the matching entry from the RIPE Database.

This is the RIPE Database for IP networks and AS numbers (Europe, the Middle East and Central Asia) – not a domain whois. You can enter IPv4 and IPv6 addresses, prefixes such as 193.0.0.0/21, IPv4 ranges, AS numbers such as AS3333 and AS sets such as AS-RIPENCC.

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What is in the RIPE Database?

The RIPE NCC allocates IP addresses and AS numbers for Europe, the Middle East and parts of Central Asia. The RIPE Database records who an address range is allocated to, which autonomous system announces it and who looks after it technically. Network operators use it to coordinate when something goes wrong or a network is being misused.

Other regions have their own registries: ARIN (North America), APNIC (Asia-Pacific), LACNIC (Latin America) and AFRINIC (Africa). If an address belongs to one of them, the RIPE Database only holds a placeholder, and we tell you so.

IP networks, not domains

Who holds a domain is not recorded in the RIPE Database but at the registry of the domain extension; use our domain search for that. The RIPE lookup helps when you want to know who is behind an IP address – for example when unusual requests show up in your server log.

Frequently asked questions

What can I enter?

An IPv4 or IPv6 address (e.g. 193.0.0.0), a prefix (e.g. 2001:67c:2e8::/48), an IPv4 range (e.g. 193.0.0.0 - 193.0.7.255), an AS number (e.g. AS3333) or an AS set (e.g. AS-RIPENCC). We deliberately do not search for people’s names or free text.

Why are email addresses and phone numbers missing?

The RIPE Database only returns some details in filtered form for normal queries, and we deliberately do not load linked contact objects. Full contact details – such as the abuse address – are available through the official RIPE query.

How current is the data?

Every query goes live to the RIPE Database; we do not keep a copy. Changes a network operator makes there show up straight away.

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