VSPIC
Network Tools

ASN Peering Lookup — BGP Route & Prefix Data

ASN registry and announced IPv4 prefixes — bgp-route backend for peering research

How to Use This Tool

  1. Enter an ASN (AS15169 or 15169), IPv4 address, or domain name.
  2. bgp-route normalizes AS-prefixed input and queries BGPView registry.
  3. ASN-shaped input triggers IPv4 prefix fetch when prefixes API responds.
  4. Up to twenty sample prefixes display with prefixCount total.
  5. IP or domain input maps to originating ASN, org, and country.
  6. Review asn, organization, prefixes, prefixCount, and note fields.

About This Tool

Peering coordinators researching bilateral sessions, IX participation, and prefix holdings start with ASN identity — who operates the network, which registry delegated the number, and which IPv4 blocks they announce in BGP. VSPIC asn-peering-lookup calls the bgp-route action with your query — IPv4, resolvable domain, or ASN such as AS15169 — returning ASN metadata from BGPView registry lookup and up to twenty sample ipv4_prefixes with prefixCount when prefix enumeration succeeds.

This page does not query PeeringDB for facility lists, bilateral peering policies, or live BGP session state. It shares identical JSON with bgp-route-lookup and asn-lookup — registry plus prefix snapshot suitable for initial peering desk triage before opening PeeringDB or contacting NOC contacts via abuse-contact-finder.

Common use cases

  • •Measure download and upload speed
  • •Test open ports on a home router or server
  • •Trace routing paths to diagnose latency

Why use VSPIC for ?

  • ASN registry metadata for peering candidate verification.
  • Sample IPv4 prefix list confirms announcement scope before IX requests.
  • prefixCount summarizes total prefixes even when display caps at twenty.
  • Domain and IPv4 flexible input for log-derived investigations.
  • Same bgp-route JSON as bgp-route-lookup for automation reuse.
  • Free instant lookup — no account required.

Peering research versus bgp-route snapshot

PeeringDB adds facility presence, traffic ratios, and policy hints operators publish voluntarily. Our page returns authoritative ASN registry fields and public BGP prefix announcements via bgp-route — enough to confirm you research the correct AS before deeper PeeringDB dives.

Treat prefix samples as footprint indicators, not contractual commitment to peer.

What bgp-route returns for ASN input

AS15169 style queries fetch BGPView asn/{num}/prefixes when API succeeds — prefixes array sliced to twenty entries, prefixCount for totals. Registry includes organization, country, and name strings for peering request templates.

Failed prefix API still returns asnInfo with explanatory note — ASN identity remains useful.

What bgp-route returns for IP input

Single-address queries map to parent ASN and org — helpful when peering desk receives suspicious traffic logs referencing one IP and needs upstream AS identification first.

Full prefix tables appear primarily on ASN-shaped input, not IP-only paths.

Relationship to bgp-route-lookup and asn-lookup

asn-peering-lookup, bgp-route-lookup, and asn-lookup share action bgp-route with identical JSON on overlapping inputs. asn-peering-lookup emphasizes peering coordinator SEO vocabulary.

API GET /ip-tools/api/extended?action=bgp-route&query=AS15169 interchangeably.

IX and transit workflows

Confirm candidate ASN announces meaningful prefix holdings before requesting cross-connect at an internet exchange. Compare prefixCount against expected provider size — tiny counts may indicate stub AS or downstream customer rather than tier-1 peer.

Pair with reverse-asn-lookup when you have organization name but not ASN number yet.

RPKI and hijack context

Prefix announcements without RPKI ROA coverage remain common — this lookup does not validate ROA. Use route-origin-validation-checker and dedicated RPKI monitors for origin validation workflows.

Sudden ASN changes for prefixes you operate warrant escalation beyond snapshot lookup.

Domain resolution for peering triage

Paste customer domain from mail headers — bgp-route resolves A record to IPv4 then maps ASN. CDN edges may show provider ASN distinct from origin hosting.

API automation

Parse asn, org, prefixes, prefixCount in JSON. Cache registry metadata longer than prefix lists. Branch parsers on ASN-shaped versus IP-shaped queries.

Respect rate limits when bulk-processing peering candidate lists.

Important notes & limitations

  • Does not list PeeringDB facilities, peering policies, or contact emails.
  • No live BGP session or RPKI ROA validation on this page.
  • Prefix API may fail — registry-only fallback with note.
  • IPv6 prefix enumeration not emphasized in current API path.
  • Peering agreement terms require direct provider negotiation — not inferred here.

Frequently Asked Questions

Yes. VSPIC offers this ASN peering lookup at no cost with no account required. Results load in real time.

We do not permanently store your queries on our servers. Some tools run entirely in your browser; others fetch public data for the request only.

Yes. Open the page in any modern phone or tablet browser. Results work on Wi‑Fi and mobile data.

No. It runs bgp-route registry and prefix snapshot. Use PeeringDB directly for policy and facility data.

Yes. action bgp-route with query parameter — identical JSON fields.

Up to twenty samples for ASN queries with prefixCount for total when API succeeds.

Enter ASN or IP here. Use reverse-asn-lookup for organization name search.

No. On-demand ownership snapshot only — not cryptographic origin validation.

bgp-route with the query parameter.

Next step for your check

Continue with bgp route lookup on VSPIC.

BGP Route Lookup

Related Tools

Explore more free VSPIC tools for IP, DNS, security, and network diagnostics.

Browse all toolsComparison guides

Trusted by Users Who Value Privacy

Always Free

No premium plan ever

100% Private

Files processed in browser

Instant Results

Convert in seconds

Works Everywhere

Any device, any OS