ASN Lookup

Find the network behind any IP address, and whether it's a home ISP, a hosting company or a VPN. Fidro flags 958 hosting and VPN networks. Free, no signup.

IP to ASN: why the network matters

Every public IP address belongs to a network with an autonomous system number (ASN). Comcast, Vodafone and BT run networks full of homes and phones. AWS, DigitalOcean, OVH and Hetzner run networks full of servers.

That difference is most of what IP-based fraud detection is about. A customer on home broadband looks like a customer. A "customer" on a hosting network is a VPN, a proxy, a scraper or a script, and the fraud score should say so.

Fidro flags hosting networks as datacenter IPs (+15) and VPN networks as VPNs (+25) in the IP fraud score. Each network page below shows what Fidro knows about it: size, announced ranges, and how many of its addresses are Tor exits, open proxies or on abuse lists.

VPN networks

Networks commercial VPN providers rent their servers from.

AS9009 · RO M247 Europe SRL AS212238 · GB Datacamp Limited

Largest hosting networks

The biggest datacenter and cloud networks on Fidro's list, by IPv4 addresses announced.

AS16509 · US Amazon.com, Inc. AS8075 · US Microsoft Corporation AS396982 · US Google LLC AS14618 · US Amazon.com, Inc. AS31898 · US Oracle Corporation AS45102 · CN Alibaba (US) Technology Co., Ltd. AS16276 · FR OVH SAS AS24940 · DE Hetzner Online GmbH AS14061 · US DigitalOcean, LLC AS20473 · US The Constant Company, LLC AS63949 · SG Akamai Connected Cloud AS203020 · IN HostRoyale Technologies Pvt Ltd AS21859 · US Zenlayer Inc AS12876 · FR Scaleway SAS AS51167 · DE Contabo GmbH AS46606 · US Unified Layer AS62904 · US Eonix Corporation AS60781 · NL LeaseWeb Netherlands B.V. AS6939 · US Hurricane Electric LLC AS62240 · GB Clouvider Limited AS18779 · US EGIHosting AS46261 · US QuickPacket, LLC AS40676 · US Psychz Networks AS137409 · AU GSL Networks Pty LTD AS46475 · US Limestone Networks, Inc. AS60068 · GB Datacamp Limited AS29838 · US Atlantic Metro Communications II, Inc. AS25369 · GB Hydra Communications Ltd AS46844 · US Sharktech AS11878 · US tzulo, inc. AS10439 · US CariNet, Inc. AS32097 · US WholeSale Internet, Inc. AS18450 · US WebNX, Inc. AS63023 · US GTHost AS27589 · US MOJOHOST AS53850 · US GorillaServers, Inc. AS36236 · US NetActuate, Inc AS14956 · US RouterHosting LLC AS33387 · US Nocix, LLC AS397373 · US H4Y Technologies LLC AS202468 · IR AbrArvan-AS Noyan Abr Arvan Co. ( Private Joint Stock) AS32181 · US GigeNET AS22781 · US Strong Technology, LLC. AS53667 · US FranTech Solutions AS52925 · BR Ascenty Data Centers e Telecomunicacoes S/A AS60404 · NL Liteserver The Infrastructure Group B.V. AS19844 · US SBA Edge, LLC

Frequently Asked Questions

What is an ASN?

An autonomous system number (ASN) identifies a network on the internet: an ISP, a mobile carrier, a cloud provider or a hosting company. Every public IP address is announced by one of them. AS16509 is Amazon, AS14061 is DigitalOcean, AS9009 is M247.

How do I find the ASN of an IP address?

Type the IP into the ASN lookup above. Fidro finds the network that announces it and, if that network is a hosting or VPN provider on Fidro's lists, takes you to its risk profile.

Why does the ASN matter for fraud?

Because it tells a home connection from a server. Real customers browse from ISPs and mobile carriers. VPNs, proxies, bots and fake-account farms run on hosting networks. The ASN is how Fidro tells the two apart, and why a datacenter IP adds 15 points to the fraud score and a VPN network adds 25.

Which networks does Fidro flag?

About 958 hosting and VPN networks, taken from the open X4BNet lists_vpn project. Their IP ranges make up the datacenter and VPN lists every Fidro check uses. Home ISPs and mobile carriers are not flagged.