CBP port code 3701 is Milwaukee, WI, a Schedule D port of entry in district 37, entered in the port field of Form 7501, ACE and ISF filings. Its UN/LOCODE is USMKE.
Also on this page: the customs district, the facility type, the UN/LOCODE your carrier books against, the other ports of entry in the district, and clearance and ISF help for cargo entering through Milwaukee, WI.
Schedule D port code3701
Port of entry Milwaukee, WI listed as “MILWAUKEE, WI”
Customs district37Milwaukee, WIthe first two digits of every port code in the district
StateWI
FacilityPort of entry
UN/LOCODEUSMKE Milwaukee →for carrier bookings and bills of lading, not the 7501
Using 3701 on entry documents
Port code 3701 identifies Milwaukee, WI 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), which must be on file before ocean cargo loads for the United States.
The first two digits are the customs district: 3701 belongs to district 37, and every port of entry in that district starts with the same two digits.
The code is for customs, not carriers. 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 Milwaukee, WI that UN/LOCODE is USMKE; give the broker 3701 and the carrier the UN/LOCODE.
CBP adds and retires codes as ports of entry open, merge or close, so confirm 3701 against the current CBP publication before filing. Airlift USA does not hold a U.S. customs broker license; entries on cargo we move are filed through our licensed broker network.
Other ports of entry in district 37
4 other ports of entry share district 37, each with its own Schedule D page.
3701 is the CBP Schedule D port code for Milwaukee, WI. It is the four-digit U.S. Customs and Border Protection identifier for that port of entry, listed in district 37. 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, which lists 3701.
Get a quote to import via Milwaukee, WI
Tell us the origin, the cargo and the container type or weight, and we’ll 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.
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