ISP & ASN Lookup - Your Internet Provider & Network Details
Find your Internet Service Provider (ISP) and Autonomous System Number (ASN) instantly. Learn how networks connect through peering and transit, why internet routing changes, and understand the infrastructure that powers your connection to the web.
What is an Autonomous System (AS)?
Definition
An Autonomous System is a network of IP prefixes under the control of one or more network operators that presents a common routing policy to the internet.
- • A neighborhood in the internet city
- • Each has a unique ASN (like a postal code)
- • Contains multiple IP address ranges
- • Managed by a single organization
ASN Examples
Peering & Transit 101
How Networks Connect
Peering
Free, direct connections between networks of similar size. Both networks benefit from shorter paths and reduced costs.
✅ Better performance
✅ Reduced latency
Transit
Paid service where a larger network (provider) carries traffic for a smaller network (customer) to reach the global internet.
🌐 Access to full internet
📈 Scalable capacity
Internet Exchange Points (IXPs)
IXPs are physical locations where multiple networks connect to exchange traffic. They're like internet switchboards that keep traffic local and improve performance.
Benefits of IXPs
- •Reduced Latency: Shorter paths between networks
- •Lower Costs: Less reliance on expensive transit
- •Better Performance: Local traffic stays local
- •Redundancy: Multiple connection options
Why Latency Varies
Your ping times to different destinations depend on the path your packets take through the internet. Here's what affects your latency:
Physical Factors
- •Distance: Light travels ~200,000 km/s in fiber
- •Routing: Packets may take indirect paths
- •Congestion: Busy links cause queuing delays
- •Equipment: Routers add processing time
Business Factors
- •Peering: Direct connections are faster
- •Transit costs: Cheaper routes may be longer
- •Politics: Some networks don't peer with others
- •CDNs: Content closer to you is faster