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POST
/
v1
/
carriers
/
bulk-by-mc
curl -X POST https://api.dotlookup.dev/v1/carriers/bulk-by-mc \
  -H "Content-Type: application/json" \
  -H "X-API-Key: your_api_key_here" \
  -d '{"mc_numbers": ["747866", "000000"]}'

{
  "data": [
    {
      "dot_number": "2233855",
      "mc_number": "747866",
      "legal_name": "ACME TRUCKING LLC",
      "dba_name": "ACME FREIGHT",
      "status": "ACTIVE",
      "address": {
        "street": "123 Main St",
        "city": "Dallas",
        "state": "TX",
        "zip": "75201",
        "lat": 32.7767,
        "lon": -96.797
      },
      "contact": { "phone": "(214) 555-0100", "email": "info@acmetrucking.com" },
      "fleet": { "power_units": 45, "drivers": 52 },
      "authority": {
        "status": "AUTHORIZED FOR HHG",
        "common_authority_date": "2012-06-15T00:00:00Z",
        "contract_authority_date": null,
        "broker_authority": "N"
      },
      "mcs150": { "date": "2024-06-01T00:00:00Z", "mileage": 1200000, "mileage_year": 2023 },
      "cargo_carried": ["General Freight"],
      "operation_classification": ["Authorized For Hire"]
    }
  ],
  "not_found": ["000000"]
}
Resolve a list of MC (docket) numbers to carriers in a single request (max 500). The MC-keyed companion to Bulk Lookup — ideal for enriching records that only carry an MC number with the authoritative USDOT number, legal name, and status. The response separates the carriers that matched (data) from the MC numbers that matched nothing (not_found), so you can reconcile a batch in one pass instead of looping the search endpoint one MC at a time.
This endpoint requires an API key. See Authentication.
Like Bulk Lookup, this returns the core carrier profile only — safety, insurance, risk score, and related companies are not included. For those, fetch each carrier individually via GET /v1/carriers/{dot_number}.
Send MC numbers in their bare, canonical form — no MC prefix and no leading zeros (e.g. 55889, not MC-0055889). Unlike the search endpoint, results are not filtered by status, so an MC belonging to an inactive carrier still resolves.
​
mc_numbers
string[]
required
Array of MC numbers to resolve (max 500). Blank entries and duplicates are ignored.
curl -X POST https://api.dotlookup.dev/v1/carriers/bulk-by-mc \
  -H "Content-Type: application/json" \
  -H "X-API-Key: your_api_key_here" \
  -d '{"mc_numbers": ["747866", "000000"]}'

{
  "data": [
    {
      "dot_number": "2233855",
      "mc_number": "747866",
      "legal_name": "ACME TRUCKING LLC",
      "dba_name": "ACME FREIGHT",
      "status": "ACTIVE",
      "address": {
        "street": "123 Main St",
        "city": "Dallas",
        "state": "TX",
        "zip": "75201",
        "lat": 32.7767,
        "lon": -96.797
      },
      "contact": { "phone": "(214) 555-0100", "email": "info@acmetrucking.com" },
      "fleet": { "power_units": 45, "drivers": 52 },
      "authority": {
        "status": "AUTHORIZED FOR HHG",
        "common_authority_date": "2012-06-15T00:00:00Z",
        "contract_authority_date": null,
        "broker_authority": "N"
      },
      "mcs150": { "date": "2024-06-01T00:00:00Z", "mileage": 1200000, "mileage_year": 2023 },
      "cargo_carried": ["General Freight"],
      "operation_classification": ["Authorized For Hire"]
    }
  ],
  "not_found": ["000000"]
}