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FIRMS code

W231 MAT Express

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
W231
Name
MAT Express
Address
12833 Chadron Ave
Hawthorne, CA 90250-5524
Status
Deleted (D)
Facility type
Inspection facility (05)
CBP port
Los Angeles Intl Airport, CA (2720)
CBP region
7
Last changed
2026-10-23
Data as of
2026-10-23

Pre-filing validation

Validate W231 before you file

Validation fails W231: 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":"W231","port":"2720","use":"location_of_goods"}'
Get a free key Validation guide

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.