BGP Upstream Explorer

Discover the transit providers behind any network. Enter an ASN to see who's delivering their connectivity.

Try:

📡 Try our API: https://bgp.lynk.run/api/v1/public/upstreams/34309 click to copy · 5 free lookups/day

🌐

Real-time BGP Data

Live upstream transit provider information sourced from global BGP routing tables.

🔍

Competitive Intelligence

Identify which transit providers your prospects rely on. Find opportunities to offer better connectivity.

⚡

API Access

Integrate upstream data into your workflows with our authenticated REST API.

Need more? Register for API access

Get unlimited API lookups with your @link11.com email address.

Free tier: 5 lookups/day. Need more? Register for API access with your @link11.com email.

📡 API Documentation

Integrate BGP upstream data into your tools and workflows. View full API docs →

Public Endpoint (No Auth Required)

GET

/api/v1/public/upstreams/:asn

Rate limit: 5 lookups per day per IP address

curl https://bgp.lynk.run/api/v1/public/upstreams/34309

Authenticated Endpoint (Unlimited)

GET

/api/v1/upstreams/:asn

Requires API key from api.lynk.run

# Option 1: Authorization header (recommended)
curl -H "Authorization: Bearer lynk_your_api_key" \
  https://api.lynk.run/bgp/v1/upstreams/34309

# Option 2: Query parameter
curl "https://bgp.lynk.run/api/v1/upstreams/34309?key=bgp_your_key"

Example Response

{
  "asn": 34309,
  "name": "LINK11 - Link11 GmbH",
  "description": "Link11 GmbH",
  "country": "DE",
  "upstreams": {
    "ipv4": [
      {
        "asn": 1299,
        "name": "TWELVE99 - Arelion Sweden AB",
        "description": "Arelion Sweden AB"
      }
    ]
  },
  "upstream_count": { "ipv4": 11, "ipv6": 0 },
  "queried_at": "2026-02-13T18:30:00.000Z"
}

Direct Links

View results in your browser — shareable and bookmarkable:

https://bgp.lynk.run/as/34309

Rate Limits

Endpoint	Rate Limit
`/api/v1/public/upstreams/:asn`	5 lookups/day per IP
`/api/v1/upstreams/:asn` (with API key)	Unlimited