M538 MARATHON AIRPORT

Facility details

FIRMS code

M538

Name

MARATHON AIRPORT

Address

9000 OVERSEAS HWY

MARATHON, FL 33050-3242

Status

Active (A)

Facility type

Inspection facility (05)

CBP port

Key West, FL (5202)

CBP region

4

Last changed

2026-10-23

Data as of

2026-10-23

Pre-filing validation

Validate M538 before you file

Check M538 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":"M538","port":"5202","use":"location_of_goods"}'