What should you record first?
Record the target IP, matching prefix, ASN, organization field, sources, and query time. For a domain, also keep the A and AAAA answers returned by that query.
NETWORK GUIDE
Routing Troubleshooting and Network Analysis
The site helps identify the prefix and ASN for an address, then exposes peers, upstreams, and downstreams. It does not run traceroute, MTR, latency, or packet-loss tests from the browser.
Data note · IP-VPSMarketLast updated · Jul 20, 2026ASN, BGP, and Routing Topics
This guide explains public network concepts. Routes, ownership records, and Geo data can change; verify time-sensitive decisions with the source or network operator.
Guide category
ASN, BGP, and Routing Topics
Understand ASNs, BGP prefixes, network relationships, route observations, and troubleshooting methods.
Why is static BGP data not the actual path?
Prefixes and ASN relationships describe public control-plane context. Forward and return paths still vary with location, carrier policy, and time.
Which observations should come next?
Run traceroute or MTR from an affected network, check forward and return paths across several time windows, and compare the observed ASNs with the prefix data shown here.
Questions covered in this guide
Routing Troubleshooting and Network AnalysisRouting Troubleshooting and Network Analysis IP lookupRouting Troubleshooting and Network Analysis ASNRouting Troubleshooting and Network Analysis BGP prefixIP Geo estimateISP and ASN lookup
Related pages and next steps
Representative IP lookup pages
8.8.8.8 · Google Public DNS
View Geo, ISP, ASN, BGP prefix, source labels, and query time for 8.8.8.8 · Google Public DNS.
1.1.1.1 · Cloudflare DNS
View the address's Geo estimate, ISP, ASN, BGP prefix, sources, and query time.
208.67.222.222 · OpenDNS
View the resolver address's Geo estimate, ISP, ASN, BGP prefix, sources, and query time.
9.9.9.9 · Quad9
View the resolver address's Geo estimate, ISP, ASN, BGP prefix, sources, and query time.
Representative ASN pages
AS15169 · Google
View prefixes, peers, upstreams, and downstreams for AS15169 · Google.
AS13335 · Cloudflare
Review Cloudflare network organization fields, prefixes, peers, upstreams, and downstreams.
AS8075 · Microsoft
Review Microsoft network organization fields, prefixes, peers, upstreams, and downstreams.
AS16509 · Amazon
Review Amazon network organization fields, prefixes, peers, upstreams, and downstreams.
Same-category topics
Related topic recommendations
Public DNS IP and Network Comparison
Compare common public resolvers by IP, Geo estimate, ISP, ASN, and BGP prefix, with clear limits for each public field.
CDN, Anycast, and Edge Network Guide
Explain why CDN and Anycast addresses can receive different Geo labels and use ASN plus BGP prefixes to interpret edge networks.
IP Geolocation Accuracy and Mismatch Guide
Explain why IP Geo databases can disagree on a city or country and how ASN, BGP prefix, source, and query time frame the estimate.
Cloud Network and ASN Comparison
Compare representative cloud and edge networks by ASN, announced prefixes, peers, upstreams, and downstreams without inferring a specific host or customer workload.
Topic frequently asked questions
What evidence should you check for Routing Troubleshooting and Network Analysis?
Record the relevant IP, ASN, BGP prefix, source labels, and query time first. Verify claims about DNS behavior, network operators, or product capabilities against current operator documentation or the relevant registry.
Can public network data prove the conclusion in Routing Troubleshooting and Network Analysis?
No. Geolocation, organization labels, and a single route observation all have source and time limits. They cannot independently prove a precise physical location, final provider, security status, or long-term performance.
How should you verify the result?
Repeat the check from another network or time window, compare the related IP and ASN pages, and confirm service-level claims against the operator's current documentation.