> For the complete documentation index, see [llms.txt](https://docs.ipcheck.ing/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ipcheck.ing/knowledge-base/lookup-privacy/asn-info.md). # ASN Info & Upstream Topology ## What it does Every public IP address belongs to a network operator, and every operator has a number: an **ASN**, or Autonomous System Number. It looks like `AS13335`. If you are new to the idea, read [What Is an ASN?](/knowledge-base/concepts/what-is-an-asn.md) first. MyIP gives you three views of the AS behind any IP address: * **AS Details** — who the AS is, and what kind of traffic it carries. * **ASN History** — which networks have announced this IP over time. * **ASN Connectivity** — a diagram of how this AS reaches the internet backbone. ## How to reach it These panels are not in Advanced Tools. They live on the IP cards themselves. {% stepper %} {% step %} ### Find the ASN row On the dashboard, look at any IP card. Below the location details there is a row labelled **ASN**, showing the AS number for that IP. {% endstep %} {% step %} ### Click one of the three icons On the right of that row are three small buttons. Hover over them to see their names: * **Show AS Details** * **Show ASN History** * **Show ASN Connectivity** {% endstep %} {% step %} ### The panel opens under the row Click the same button again to close it. Only one panel is open at a time. {% endstep %} {% endstepper %} You can do the same for any other IP: click the floating **Query IP Address** button (the magnifier in the bottom-right corner), enter an address, and the same three buttons appear in the result. {% hint style="info" %} **Show AS Details** relies on Cloudflare Radar. On a self-hosted deployment without a Cloudflare API key configured, that button is hidden. History and Connectivity still work. {% endhint %} ## AS Details The header reads **Data for this AS**. You get: | Field | What it means | | ------------------- | ------------------------------------------------------------- | | **AS Name** | The short handle of the network, for example `CLOUDFLARENET`. | | **AS Organization** | The company or institution that runs it. | | **AS Country** | The country the AS is registered in. | | **Estimated Users** | A rough estimate of how many people this network serves. | Below that, under **Traffic Percentage**, are four bars. Each one splits observed traffic on this network into two shares: * **IPv4 / IPv6** — how much of the network has moved to the newer protocol. * **HTTP / HTTPS** — how much traffic is encrypted. * **Desktop / Mobile** — the device mix. * **Human / Bot** — how much traffic looks automated. These figures come from Cloudflare Radar's recent measurements. They describe the whole network, not you. A small or new AS may have no traffic data at all, in which case the bars are simply not shown. At the bottom, **More Data** links out to BGP.Tools and Cloudflare Radar for the deeper view. ## ASN History The header reads **Historical ASN announcements for this IP**. This answers a different question: over the years, which networks have claimed to route this address? The data comes from RIPEstat's routing history, looked up for the address block around your IP rather than the single address. Each row shows: | Element | What it means | | --------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------- | | `AS…` and organisation name | The network that announced the address. | | Date range | First and last time this announcement was seen, as `YYYY-MM-DD → YYYY-MM-DD`. | | Eye badge with a percentage | How widely the announcement was visible, relative to the most visible announcement in the same list. Hover it for the raw observation count. | | **Announced Prefixes** | The address blocks involved. Up to four are shown, with a `+n` marker if there are more. | A long single entry means the address has stayed with one operator for years. Several entries mean the block changed hands, or was transferred between related networks. A row with a very low visibility percentage was seen by only a few observers, so treat it as weak evidence. If the panel says *No historical routing data found for this IP*, the block simply has no recorded history in this dataset. That is common for very new allocations. ## ASN Connectivity The header reads **Upstream paths from this AS toward the Tier 1 global transit providers**. This is the diagram view. ### How to read the graph The graph flows left to right. Boxes are autonomous systems, and each arrow points from a network to one of its upstream providers — the network it buys transit from. The legend under the graph names three kinds of box: | Legend | Position | Meaning | | ------------------- | --------- | ------------------------------------------------------------- | | **Origin** | Far left | The AS you are looking at. | | **Intermediate AS** | Middle | A network in between, usually a regional or national carrier. | | **Tier 1 ISP** | Far right | A backbone network that does not buy transit from anyone. | So reading left to right is reading "who does this network depend on to reach the rest of the internet". A short graph means the network connects directly to the backbone. A longer one means traffic passes through one or more carriers first. If the AS you are looking at is itself a Tier 1 backbone, the graph is a single box. That is correct, not an error. ### Working with the diagram * Click the **Expand** icon in the panel header to open the full-screen view. * In the expanded view, hover a box (or tap it on a touch screen) to highlight every path leading to it and dim the rest. Tap it again, or tap the empty background, to clear. * Use the zoom in, zoom out and reset controls in the top-right corner. * Use the image button next to them to save the diagram as a picture. * Hover any box to see the AS number and full organisation name; long names are shortened to fit. ### Limits The topology is built from a public research dataset of inter-network relationships, and it is a summary rather than a live routing table. To keep the picture readable, it follows a limited number of hops from the origin and shows only the most significant upstream providers at each step. Real traffic may take a different path on any given day. If the panel says *No upstream connectivity data available for this AS*, that AS is not in the dataset. ## What to do next * Learn the underlying idea in [What Is an ASN?](/knowledge-base/concepts/what-is-an-asn.md). * See the registration record for the same address with [Whois Search](/knowledge-base/lookup-privacy/whois-search.md). * Understand the rest of the card in [Reading Your IP Cards](/knowledge-base/getting-started/reading-your-ip-cards.md). * Measure the actual path your packets take with the [MTR Test](/knowledge-base/network-tests/mtr-test.md). --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. 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