networkutils.org

Home / IP Tools / BGP Route View

BGP Route View

IP Tools

Announced prefixes, origin AS and upstream peers.

Run this tool: the interactive BGP Route View loads here (requires JavaScript). Input: IP or prefix — e.g. 203.0.113.0/24.

Description

The BGP Route View shows the prefixes announced for an IP or prefix, the origin ASN, and the upstream peers that carry the route — a view of how the address is routed across the global internet.

Features

✓ Announced prefixes for an IP or prefix
✓ Origin ASN and announcing organisation
✓ Upstream peer and transit AS paths
✓ Route collector data from public BGP sources

How to Use

Enter an IP address or a prefix (203.0.113.0/24) and run the tool. The probe looks up the route in public BGP route collector data.

Input: IP or prefix — e.g. 203.0.113.0/24.

Understanding the Results

The output lists the matching prefix, the origin ASN, the announcing organisation, and the AS path from the collector to the origin. Use it to verify that your prefix is being announced and to identify your transit providers and upstreams.

Common Use Cases & Examples

→ Verify your prefix is announced and visible globally.

→ Identify your transit providers and upstream ASNs.

→ Detect a possible BGP hijack or route leak by checking the origin AS.

→ Confirm a new BGP peering is propagating routes.

Frequently Asked Questions

What is an AS path?

An AS path is the sequence of autonomous systems a BGP route traversed from the collector to the origin network. It shows your transit providers and upstreams in order, and is how BGP avoids routing loops.

Why might my prefix not appear?

It may not be announced to the public internet, may be more specific than what collectors accept, or the collector may not have a vantage point that sees it. Check that your BGP session is up and that you are announcing the intended prefix length.

How can I tell if my prefix is hijacked?

Compare the origin ASN against what you expect. If a different AS is originating your prefix, or if it is being originated from multiple ASNs (a MOAS), investigate — it can indicate a route leak or an intentional hijack.

About this tool

Maintained by
networkutils.org editorial team
Last updated
September 2026
Testing methodology
IP geolocation uses the public ip-api.com service; WHOIS/RDAP uses the rdap.org bootstrap and follows redirects to the authoritative RDAP server; the Subnet Calculator and Multicast MAC Checker are pure local arithmetic with no network calls; BGP Route View queries public route-data services.
Technical references
RFC 4271 — BGP-4