--- title: "CBSA office 0406: Chatham · Adhoc" description: "0406 is the CBSA office code for Chatham, Ontario. 1 warehouse code reports to it." canonical: "https://www.adhocs.ca/cbsa-offices/0406" last_updated: 2026-07-27 --- # 0406 Chatham in Ontario CBSA office · Inland office 0406 is the CBSA office code for Chatham, an inland office in Ontario. 1 active warehouse code reports to it. - **Office code:** 0406 - **Type:** Inland office - **Province:** [Ontario](https://www.adhocs.ca/cbsa-offices/ontario) - **Warehouse codes:** 1 active - **Nearest crossing:** [Sombra–Algonac, about 40 km](https://www.adhocs.ca/border-crossings/sombra-algonac) ## 1 warehouse codes report to 0406 A warehouse’s sub-location code goes on a declaration with this office code. - [2846](https://www.adhocs.ca/cbsa-warehouses/2846) Canadian Pacific Railway, Team Track 1, Chatham ## US ports of exit near 0406 The land crossings nearest this office, each with the US port across from it. Distances are in a straight line, not by road. - [Sombra–Algonac, about 40 km](https://www.adhocs.ca/border-crossings/sombra-algonac): [0465](https://www.adhocs.ca/cbsa-offices/0465) Sombra ⇄ [3814](https://www.adhocs.ca/us-ports-of-exit/3814) Algonac, Michigan - [Sarnia–Port Huron, about 65 km](https://www.adhocs.ca/border-crossings/sarnia-port-huron): [0440](https://www.adhocs.ca/cbsa-offices/0440) Sarnia ⇄ [3802](https://www.adhocs.ca/us-ports-of-exit/3802) Port Huron, Michigan - [Windsor–Detroit, about 75 km](https://www.adhocs.ca/border-crossings/windsor-detroit): [0453](https://www.adhocs.ca/cbsa-offices/0453) Windsor - Ambassador Bridge, [0452](https://www.adhocs.ca/cbsa-offices/0452) Windsor Tunnel ⇄ [3801](https://www.adhocs.ca/us-ports-of-exit/3801) Detroit, Michigan ## Using 0406 on a declaration 1. Enter 0406 as the CBSA office where the goods are released. 2. If the goods wait in a sufferance or bonded warehouse, add its sub-location code next to the office code. 3. If the goods were exported from the United States, add the US port they left through. ## Good to know - **Same digits, two places.** As a CBSA office code, 0406 is Chatham. As a US port of exit, it is Plymouth, Massachusetts. The line on the form says which list it asks for. - **Always with an office code.** A warehouse’s four-digit code only goes on a declaration together with the code of the CBSA office it reports to. - **Courier shipments.** Low-value courier shipments name 1001, New York, as the US port of exit. ## Other offices nearby - [0450](https://www.adhocs.ca/cbsa-offices/0450) Wallaceburg (Inland office · about 25 km) - [0465](https://www.adhocs.ca/cbsa-offices/0465) Sombra (Land border crossing · about 40 km) - [0440](https://www.adhocs.ca/cbsa-offices/0440) Sarnia (Land border crossing · about 65 km) - [0452](https://www.adhocs.ca/cbsa-offices/0452) Windsor Tunnel (Land border crossing · about 70 km) - [0454](https://www.adhocs.ca/cbsa-offices/0454) Windsor (Inland office · about 70 km) Also in this directory: [Warehouse codes](https://www.adhocs.ca/cbsa-warehouses) · [US ports of exit](https://www.adhocs.ca/us-ports-of-exit) · [Border crossings](https://www.adhocs.ca/border-crossings) ## Questions ### What is CBSA office 0406? Chatham: an inland office in Ontario. 0406 is its four-digit CBSA office code. ### Which warehouses report to office 0406? 1, including Canadian Pacific Railway. They are all listed on this page. ### Which US port of exit is nearest 0406? 3814 Algonac, Michigan, about 40 km away in a straight line. It faces CBSA’s 0465 Sombra office. ### Is 0406 a US port code too? As a CBSA office code, 0406 is Chatham. As a US port of exit, it is Plymouth, Massachusetts. The line on the form says which list it asks for. ## Sources - [Directory of CBSA offices and services](https://www.cbsa-asfc.gc.ca/do-rb/menu-eng.html), Canada Border Services Agency - [Sub-location codes for customs sufferance warehouses](https://www.cbsa-asfc.gc.ca/import/codes/sw-ea-eng.html), Canada Border Services Agency, version of July 27, 2026 - [Ports of entry](https://www.cbp.gov/contact/ports), U.S. Customs and Border Protection - [Memorandum D17-1-10, Coding of Customs Accounting Documents](https://www.cbsa-asfc.gc.ca/publications/dm-md/d17/d17-1-10-eng.html), Canada Border Services Agency Office types and map positions are ours: the type is read from the office’s name, and each office is placed at its town. Which US port faces which CBSA office is matched by location; neither agency publishes it as a list. Adhoc is not affiliated with CBSA or CBP.