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RTSAK - BGP & Autonomous System Tools
Network operator tools for BGP routing analysis. Query AS numbers, examine announced prefixes, and validate route origins. Essential for peering decisions, troubleshooting, and security monitoring.
Available Tools
AS Lookup
Query any Autonomous System for organization info, announced prefixes, upstream/downstream relationships, and routing policy. The starting point for understanding any network's internet presence.
BGP Routes
Examine BGP routing for a prefix. See the AS path, origin AS, and how routes propagate across the global routing table. Essential for troubleshooting reachability issues.
Prefix Origin
Validate who is announcing a prefix. Compare current announcements against expected origins to detect potential hijacks or misconfigurations.
Why RTSAK?
Operator-focused - Built for network engineers who need BGP data for real decisions, not curiosity. The interface prioritizes actionable information.
Current data - BGP routing changes constantly. Our data reflects recent routing table state, typically within minutes of changes.
Relationship visibility - See upstream providers, downstream customers, and peering connections. Understand how traffic flows through the internet.
Common Use Cases
Peering Decisions
- Evaluate potential peering partners
- Assess network size and customer base
- Identify common upstream providers
- Research IXP presence and connectivity
Troubleshooting
- Diagnose routing anomalies and blackholes
- Trace AS paths for unexpected latency
- Verify your own announcements are visible
- Check for route leaks or hijacks
Security Monitoring
- Detect unauthorized prefix announcements
- Monitor for BGP hijacking attempts
- Validate origin AS against ROA records
- Track changes to your prefixes
Capacity Planning
- Analyze traffic sources by origin AS
- Identify growth opportunities in peering
- Research competitor network topology
Understanding BGP Data
AS Path - The sequence of autonomous systems a route traverses. Shorter paths generally mean faster, more reliable connectivity.
Origin AS - The AS that originated (first announced) the prefix. Should match the prefix owner.
Transit vs Peering - Transit is paid upstream connectivity. Peering is mutual traffic exchange, often settlement-free.
Prefix Length - More specific prefixes (/24 vs /16) are preferred in routing. This is how BGP hijacks work.
Try It Now
Enter any AS number or IP prefix in the search box above, or explore these examples:
Related Tools
RTSAK focuses on BGP and routing. For related analysis:
- Robtex - DNS, IP, and domain intelligence
- DNS Ninja - Quick DNS lookups
- RBLS - IP reputation and blocklist checking
- HashXP - Bitcoin and Lightning explorer
Last modified: 2025-12-28