J521 U S POST OFFICE OHARE AIRPORT

Facility details

FIRMS code

J521

Name

U S POST OFFICE OHARE AIRPORT

Address

11600 W PARK RD

CHICAGO, IL 60666

Status

Active (A)

Facility type

Not specified

CBP port

Chicago, IL (3901)

CBP region

3

Last changed

2026-10-23

Data as of

2026-10-23

Pre-filing validation

Validate J521 before you file

Check J521 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":"J521","port":"3901","use":"location_of_goods"}'