B452 US POST OFFICE

Facility details

FIRMS code

B452

Name

US POST OFFICE

Address

330 W Main St

Middletown, PA 17057-1049

Status

Active (A)

Facility type

CBP administrative site (08)

CBP port

Harrisburg, PA (1109)

CBP region

1

Last changed

2026-10-23

Data as of

2026-10-23

Pre-filing validation

Validate B452 before you file

Check B452 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":"B452","port":"1109","use":"location_of_goods"}'