FIRMS code

L422 POST OFFICE

Name: POST OFFICE
Address: BROAD & MEETING ST, CHARLESTON, SC, 29401, US

Active Inspection facility

Facility details

FIRMS code: L422
Name: POST OFFICE
Address: BROAD & MEETING ST
CHARLESTON, SC 29401
Status: Active (A)
Facility type: Inspection facility (05)
CBP port: Charleston, SC (1601)
CBP region: 4
Last changed: 2026-10-23
Data as of: 2026-10-23

Pre-filing validation

Validate L422 before you file

Check L422 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":"L422","port":"1601","use":"location_of_goods"}'

Get a free key Validation guide

Nearby facilities in the same port

Code	Name	Type	Distance
O197	CUSTOMS MAIL ROOM	Container freight station	466 m
L402	COLUMBUS STREET TERMINAL	Pier or terminal	2.0 km
LEF3	BMW Manufacturing Company, LLC 001	Foreign trade zone	2.5 km
N025	BMW Mfg -Columbus Street	Foreign trade zone	2.5 km
L516	Kinder Morgan Bulk Terminal Inc	Pier or terminal	5.0 km

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.