FIRMS code

H435 NORTHWEST AIRLINES INC.

Deleted Inspection facility

This code is deleted in CBP's FIRMS list. Don't use it on new filings. FIRMSapi keeps deleted codes so lookups of old paperwork still resolve; check the port listing for a replacement.

Facility details

FIRMS code: H435
Name: NORTHWEST AIRLINES INC.
Address: DULUTH INTERNATIONAL AIRPORT
DULUTH, MN 55811
Status: Deleted (D)
Facility type: Inspection facility (05)
CBP port: Duluth, Mn-Superior, WI (3510)
CBP region: 3
Last changed: 2026-10-23
Data as of: 2026-10-23

Pre-filing validation

Validate H435 before you file

Validation fails H435: it's deleted, the reject ACE returns as 159. Search the port for an active replacement.

curl https://api.firmsapi.com/v1/validate \
  -H "x-api-key: $FIRMSAPI_KEY" -H "content-type: application/json" \
  -d '{"code":"H435","port":"3510","use":"location_of_goods"}'

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Source: U.S. Customs and Border Protection FIRMS code list, data as of 2026-10-23. FIRMSapi is not affiliated with CBP; confirm bond status and filing details in ACE.