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FIRMS code

O161 U.S. POST OFFICE

Deleted Inspection facility

This code is deleted in CBP's FIRMS list. Don't use it on new filings. FIRMSapi keeps deleted codes so lookups of old paperwork still resolve; check the port listing for a replacement.

Facility details

FIRMS code
O161
Name
U.S. POST OFFICE
Address
GREENVILLE-SPARTANBURG JETPORT
GREENVILLE, SC 29612
Status
Deleted (D)
Facility type
Inspection facility (05)
CBP port
Greenville-Spartanbrg, SC (1603)
CBP region
4
Last changed
2026-10-23
Data as of
2026-10-23

Pre-filing validation

Validate O161 before you file

Validation fails O161: it's deleted, the reject ACE returns as 159. Search the port for an active replacement. 

curl https://api.firmsapi.com/v1/validate \
  -H "x-api-key: $FIRMSAPI_KEY" -H "content-type: application/json" \
  -d '{"code":"O161","port":"1603","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.