ASN Directory
Browse popular autonomous systems and open dedicated AS detail pagesThis directory organizes frequently searched ASNs by network type so you can quickly jump to dedicated pages like AS15169 and AS16509.
Entries are grouped for discovery and internal navigation. For live IP-level checks, use the ASN lookup tool.
48 indexed ASNsStatic, crawlable pagesUpdated hourly
Cloud & CDN
Cloud platforms, hosting providers, and content delivery networks.
Cloud & CDN list
- AS8075 - Microsoft Corporation (Global)
- AS13335 - Cloudflare (Global)
- AS14061 - DigitalOcean (Global)
- AS14618 - Amazon (AWS) (Global)
- AS15169 - Google (Global)
- AS16276 - OVH (Global)
- AS16509 - Amazon (AWS) (Global)
- AS20940 - Akamai (Global)
- AS24940 - Hetzner (Europe)
- AS32934 - Meta Platforms (Global)
- AS54113 - Fastly (Global)
- AS63949 - Linode (Akamai Connected Cloud) (Global)
Backbone
Transit and backbone operators often seen in long-distance routing paths.
Backbone list
- AS701 - Verizon Business (North America)
- AS1299 - Arelion (formerly Telia Carrier) (Global)
- AS174 - Cogent Communications (Global)
- AS2914 - NTT Communications (Global)
- AS3215 - Orange (Europe)
- AS3257 - GTT Communications (Global)
- AS3269 - Telecom Italia Sparkle / TIM (Europe)
- AS3356 - Lumen (Level 3) (Global)
- AS3491 - PCCW Global (Global)
- AS4713 - NTT Communications (Japan) (Japan)
- AS5511 - Orange (Europe)
- AS6453 - Tata Communications (Global)
- AS6762 - Telecom Italia Sparkle (Global)
- AS6939 - Hurricane Electric (Global)
- AS9009 - M247 (Global)
Residential ISP
Broadband providers with large consumer IP ranges and last-mile access.
Residential ISP list
- AS2856 - BT (British Telecommunications) (United Kingdom)
- AS3320 - Deutsche Telekom (Europe)
- AS4134 - China Telecom (China)
- AS4766 - KT Corp (South Korea)
- AS4837 - China Unicom (China)
- AS5089 - Virgin Media O2 (United Kingdom)
- AS5607 - Sky UK (United Kingdom)
- AS6128 - Optimum / Altice USA (United States)
- AS7018 - AT&T Services (United States)
- AS7473 - Singtel (Singapore)
- AS7922 - Comcast Cable (United States)
- AS11426 - Charter Communications (United States)
- AS12322 - Free SAS (France)
- AS12389 - Rostelecom (Russia)
- AS22773 - Cox Communications (United States)
Mobile ISP
Carrier networks serving cellular data and mobile broadband users.
Mobile ISP list
ASN & CGNAT guides
How to use these ASN pages
Start with an ASN page to identify the network operator and context, then cross-check with DNS, reverse DNS, WHOIS, and blacklist tools.
Related tools
ASN directory FAQ
What is an ASN directory?
An ASN directory is a browsable list of autonomous systems. It helps you move from a raw AS number to practical network context.
How is this different from ASN lookup?
The directory is for discovery and indexing, while ASN lookup maps a specific IP to its announcing ASN in real time.
Can I use this for BGP troubleshooting?
Yes. ASN pages are useful for identifying operators before you inspect BGP paths, peering, WHOIS data, and reverse DNS records.