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FIRMS code

L0H3 M and M Labs

Deleted Foreign trade zone

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
L0H3
Name
M and M Labs
Address
4021 HIGHWAY 108 E
MILL SPRING, NC 28756-5824
Status
Deleted (D)
Facility type
Foreign trade zone (02)
CBP port
Charlotte, NC (1512)
CBP region
4
Last changed
2026-10-23
Data as of
2026-10-23

Pre-filing validation

Validate L0H3 before you file

Validation fails L0H3: 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":"L0H3","port":"1512","use":"ftz_admission"}'
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.