ASN lookup directory
An autonomous system number (ASN) identifies the network that announces a block of IP addresses via BGP. IPLogs classifies each ASN as ISP, datacenter, CDN, commercial VPN, or cellular, and that classification directly drives the VPN-detection verdict for any IP routed through it. 96 ASNs catalogued in detail below, plus 59 more with live data pages — and any other valid ASN resolves on demand.
VPN providers (21)
Datacenters & hosting (27)
CDNs (allowlisted) (6)
ISPs (35)
Cellular networks (7)
More tracked networks (59)
Additional hosting, datacenter, cloud, CDN, and ISP networks with live ASN pages built from Team Cymru and PeeringDB data. Each shows the operator, registry, allocation date, and IPLogs classification.
ASN FAQ
What is an ASN (autonomous system number)?
An ASN is a globally unique number that identifies a network operator on the public internet. Every IP address belongs to a network that announces routes for it via BGP, and the announcing network's ASN tells you who owns the IP — an ISP, a hosting provider, a CDN, a mobile carrier, or a known VPN operator.
How do I look up the ASN for an IP address?
Run the IPLogs check at iplogs.com — every IP-detail page shows the IP's ASN, the operator name, and how IPLogs has classified that network. For programmatic access, the /v1/check API returns ip_info.asn and ip_info.org for any IPv4 or IPv6 address.
Why are ASNs important for VPN detection?
ASN ownership is the most reliable first-pass classification of an IP. Datacenter and hosting ASNs are likely VPN or server traffic; residential ISP ASNs are usually real users; mobile carrier ASNs are phones behind CGNAT. ASN doesn't decide the verdict alone, but it sets the prior.
Which ASNs belong to commercial VPN providers?
M247 (AS9009), Datacamp (AS60068), Quadranet (AS8100), and many smaller hosters are heavily used by NordVPN, ExpressVPN, CyberGhost, and other commercial brands. The catalogue above lists the ones IPLogs has tagged as commercial VPN and shows which specific provider uses each.