IP behind Cloudflare
- Input
- 104.16.x.x ou 172.67.x.x
- Expected output
- Cai dentro de um prefixo da AS13335
Indicates a proxy/CDN, not necessarily the origin server.
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Cloudflare ASN
Cloudflare operates under ASN AS13335, one of the most interconnected networks on the internet, since it acts both as a CDN/reverse proxy for millions of sites and as one of the world's largest public DNS resolvers (1.1.1.1). The lookup below uses RIPEstat's public API, no API key required, to pull prefixes and BGP neighbours in real time.
Indicates a proxy/CDN, not necessarily the origin server.
Cloudflare's public DNS service uses the same ASN.
Holder and prefix count as returned by the RIPEstat API at the time of this lookup.
ASN stands for Autonomous System Number, a number that identifies a network that routes traffic independently on the internet, defining its own routing policy via BGP. Internet service providers, cloud providers, large companies and universities typically have their own.
Usually yes, specifically behind their reverse proxy (the most common way it is used). The real origin server, with the actual content, sits on a different IP that Cloudflare hides by default.
AS13335 is the main and best-known one, but companies this size can operate additional ASNs for specific services or acquisitions, the result here shows the prefixes and neighbours associated with this specific ASN, not the sum of every network the company might control.
It is a number calculated by RIS (RIPE NCC's Routing Information Service, the route collectors that feed RIPEstat) indicating how many collectors observed that adjacency between two ASNs, the higher the value, the more visible and consistent that neighbour is in the global routing table.
Every address block Cloudflare received from customers (through its bring-your-own-IP DDoS protection plans) or reserved for expansion becomes a separately announced prefix. Multiplied across millions of served domains, the total easily passes 5,000 distinct prefixes, visible in the lookup above.
Look up an ASN directly (AS15169 or 15169) or an IP address, and the tool finds the ASN announcing that address on the internet. Data comes from RIPEstat, RIPE NCC's public routing statistics API, straight from your browser.
The lookup runs directly from your browser against RIPEstat's public API (RIPE NCC), the J-Kit server never intermediates that call. ASN, prefix and BGP adjacency data are public internet routing data, the same information any network announces to its neighbours.