VSPIC
Network Tools

BGP Hijack Checker — ASN & Route Ownership Lookup

BGP ownership snapshot for hijack triage — bgp-route backend, not live hijack alerting

How to Use This Tool

  1. Enter a public IPv4, domain, or ASN suspected in a routing incident.
  2. bgp-route queries BGPView registry and optional prefix enumeration.
  3. ASN input returns sample announced ipv4_prefixes and prefixCount.
  4. IP input maps address to current originating ASN and organization.
  5. Compare results against expected provider documentation and IRR entries.
  6. Document asn, org, prefixes, and note before escalating to upstream NOC.

About This Tool

BGP hijacks occur when an autonomous system announces IP prefixes it does not legitimately originate — redirecting traffic, enabling interception, or disrupting reachability. Incident responders establishing baseline ownership ask which ASN normally originates an address and which prefixes an AS announces. VSPIC bgp-hijack-checker calls the bgp-route action with IPv4, domain, or ASN input — returning registry metadata, organization, country, and up to twenty ipv4_prefixes with prefixCount on ASN queries — identical JSON to bgp-route-lookup.

This page does not perform continuous BGP monitoring, RPKI ROA validation, or compare live global routing tables against IRR objects. It provides on-demand ownership context for hijack triage — pair with route-origin-validation-checker for CDN origin heuristics and enterprise RPKI monitors for sustained assurance.

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 ?

  • Quick ASN ownership baseline during suspected hijack incidents.
  • Sample prefix list verifies AS identity when abuse reports reference AS numbers.
  • org and country fields feed provider escalation templates.
  • Same bgp-route JSON reusable with bgp-route-lookup automation.
  • Domain and IPv4 input for log-derived suspicious addresses.
  • Free instant snapshot — no account required.

Hijack detection expectations versus bgp-route snapshot

Enterprise hijack detection compares live BGP feeds from multiple collectors, validates RPKI ROAs, and alerts on unexpected origin AS changes within minutes. Our page answers a narrower on-demand question: what ASN and prefixes does public registry data associate with this input right now?

Use results as triage baseline — not definitive hijack verdict.

What bgp-route contributes to hijack triage

When logs show traffic to an IP, mapping to asn and org confirms whether the address belongs to expected provider AS. ASN queries list sample prefixes — verify your operated prefixes appear under your AS, not a stranger's.

note field documents when prefix enumeration failed — retry before closing incidents.

Relationship to route-origin-validation-checker

route-origin-validation-checker calls action origin-ip with URL input — CDN detection and historical DNS origin candidates for web properties. bgp-hijack-checker uses bgp-route for IP, domain, or ASN routing registry — complementary layers during investigations.

Web origin leaks differ from BGP prefix hijacks — use both mental models.

Relationship to bgp-route-lookup

bgp-hijack-checker and bgp-route-lookup share action bgp-route with identical JSON. bgp-route-lookup emphasizes peering research SEO; this page frames hijack investigation vocabulary with honest snapshot limitations.

RPKI and IRR follow-up

After unexpected ASN results, check RPKI ROA coverage and IRR route objects at your RIR. Dedicated RPKI validators exceed this page scope.

Document expected origin AS in runbooks so on-call compares quickly during alerts.

Anycast and migration false positives

CDN anycast and provider migrations legitimately shift apparent origin AS. Correlate with change windows and provider status pages before alleging hijack.

Multiple AS paths to same content may reflect multihoming — not attack.

Incident response workflow

Paste suspicious IP from traceroute or BGP alarm. Record asn and org. Open provider abuse ticket with prefix and timestamp. Re-query after mitigation to confirm restoration.

Pair with abuse-contact-finder for provider contact hints.

API action bgp-route

GET /ip-tools/api/extended?action=bgp-route&query=203.0.113.10. Automate baseline snapshots — cache briefly, re-query during active incidents.

Do not auto-block based solely on single snapshot without human review.

Important notes & limitations

  • Not continuous hijack detection — single query-time snapshot only.
  • Does not validate RPKI ROA or compare multiple BGP vantage points.
  • Cannot prove malicious intent — unexpected ASN may be migration or anycast.
  • Prefix API failures fall back to registry-only with note.
  • Historical BGP timeline not available on this page.

Frequently Asked Questions

Yes. VSPIC offers this BGP hijack checker 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 provides on-demand ASN and prefix snapshot via bgp-route. Use RPKI monitors for continuous detection.

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

No. Ownership snapshot only — not ROA cryptographic validation.

Not alone. Verify against IRR, RPKI, provider tickets, and migration schedules.

route-origin-validation-checker with origin-ip action for URL input.

bgp-route with the query parameter.

Next step for your check

Continue with bgp route lookup on VSPIC.

BGP Route Lookup

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