2101 is the U.S. Customs and Border Protection Schedule D port code for Port Arthur, TX, in district 21. It is the four-digit code entered in the port field of CBP Form 7501 and in ACE, AMS and ISF filings. It is not a UN/LOCODE — the UN/LOCODE for this place is USPOA.
Schedule D port code2101
Port of entry Port Arthur, TX listed as “PORT ARTHUR, TX”
Customs district21Port Arthur, TXthe first two digits of every port code in the district
StateTX
FacilityPort of entry
UN/LOCODEUSPOA Port Arthur →for carrier bookings and bills of lading — not for the 7501
Using 2101 on entry documents
Port code 2101 identifies Port Arthur, TX as the port of entry on CBP Form 7501, the entry summary a broker files for every formal entry. The same four digits identify the port in ACE entry filings, in AMS manifest data and in the Importer Security Filing (ISF) that must be on file before ocean cargo loads for the United States. The code belongs to the customs district whose two-digit number it begins with — district 21 — and every port of entry in that district shares the same first two digits.
The code is a customs identifier, not a carrier one. Carriers, forwarders and NVOCCs book and manifest against the UN/LOCODE for the place, and the bill of lading shows that five-character code, not the Schedule D code. For Port Arthur, TX that UN/LOCODE is USPOA; give the broker 2101 and the carrier the UN/LOCODE.
Codes are added and retired as ports of entry open, merge or close, so confirm 2101 against the current CBP publication before filing. Airlift USA does not hold a U.S. customs broker licence; entries on cargo we move are filed through our licensed broker network.
Other ports of entry in district 21
3 other ports of entry share district 21. Each has its own Schedule D page.
2101 is the CBP Schedule D port code for Port Arthur, TX. It is the four-digit U.S. Customs and Border Protection identifier for that port of entry, listed in district 21. Source: Schedule D — District/Port List, Foreign Trade Division, U.S. Census Bureau, April 2025.
Port codes: Schedule D — District/Port List, Foreign Trade Division, U.S. Census Bureau, April 2025 — Census Schedule D list. Cross-checked against CBP ACE M1 Import Manifest, Appendix E — Schedule D, U.S. CBP Port Codes, revised 2026-02-03.
Importing through Port Arthur, TX?
Send us the origin, the cargo and the entry port and we will come back with a rate, a routing and the clearance steps. Airlift USA is a licensed NVOCC with direct carrier contracts on the major US trade lanes; customs clearance is coordinated through our licensed broker network.