FIRMS code

K621 MASON AND DIXON LINES

Name: MASON AND DIXON LINES
Address: 50 ILLINOIS AVE, CINCINNATI, OH, 45215-5512, US

Active Inspection facility

Facility details

FIRMS code: K621
Name: MASON AND DIXON LINES
Address: 50 ILLINOIS AVE
CINCINNATI, OH 45215-5512
Status: Active (A)
Facility type: Inspection facility (05)
CBP port: Cincinnati, OH (4102)
CBP region: 3
Last changed: 2026-10-23
Data as of: 2026-10-23

Pre-filing validation

Validate K621 before you file

Check K621 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":"K621","port":"4102","use":"location_of_goods"}'

Get a free key Validation guide

Nearby facilities in the same port

Code	Name	Type	Distance
HBM4	Patheon Pharmaceuticals Inc. 002	Foreign trade zone	306 m
HBM3	Patheon Pharmaceuticals Inc. 001	Foreign trade zone	537 m
I346	P.B. EXPRESS	Inspection facility	2.2 km
H0S8	Advanced Ground Systems 001	Foreign trade zone	3.5 km
HBA5	MANE Inc. 02	Foreign trade zone	4.1 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.