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FIRMS code

S979 MAIL UNIT CARGO

Deleted Bonded warehouse

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
S979
Name
MAIL UNIT CARGO
Address
4600 ALDINE BENDER RD
HOUSTON, TX 77032-4103
Status
Deleted (D)
Facility type
Bonded warehouse (04)
CBP port
Houston Intercontl Airp, TX (5309)
CBP region
6
Last changed
2026-10-23
Data as of
2026-10-23

Pre-filing validation

Validate S979 before you file

Validation fails S979: 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":"S979","port":"5309","use":"warehouse_entry"}'
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.