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FIRMS code

M387 CUSTOMS HOUSE

Active CBP administrative site

Facility details

FIRMS code
M387
Name
CUSTOMS HOUSE
Address
CUSTOMS HOUSE OFFICE
SAN JUAN, PR 00903
Status
Active (A)
Facility type
CBP administrative site (08)
CBP port
San Juan, PR (4909)
CBP region
4
Last changed
2026-10-23
Data as of
2026-10-23

Pre-filing validation

Validate M387 before you file

Check M387 against the port and use on your filing before ACE does: list, status, port (ACE 164) and facility type. 

curl https://api.firmsapi.com/v1/validate \
  -H "x-api-key: $FIRMSAPI_KEY" -H "content-type: application/json" \
  -d '{"code":"M387","port":"4909","use":"location_of_goods"}'
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Nearby facilities in the same port

CodeNameTypeDistance
L880 SEA STAR LINE Bonded warehouse 319 m
M420 Depto de Desarrollo Economico y Comercio Foreign trade zone 319 m
N974 CELEBRITY CRUISES INC Importer's premises 461 m
O098 CONTINENTAL SHIPPING, INC Importer's premises 461 m
O520 PIER 4 Pier or terminal 855 m

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.