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FIRMS code

H266 SLOULIN FIELD INTL

Active Inspection facility

Facility details

FIRMS code
H266
Name
SLOULIN FIELD INTL
Address
SLOULIN FIELD
WILLISTON, ND 58801
Status
Active (A)
Facility type
Inspection facility (05)
CBP port
Williston Airport, ND (3433)
CBP region
3
Last changed
2026-10-23
Data as of
2026-10-23

Pre-filing validation

Validate H266 before you file

Check H266 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":"H266","port":"3433","use":"location_of_goods"}'
Get a free key Validation guide

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.