Guam, and the Northern Mariana Islands

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07 Chicago. Iowa and most of Illinois, Indiana, Michigan, and Wisconsin
08 St. Louis. Arkansas and portions of six other states: Missouri, Mississippi, Tennessee, Kentucky, Indiana, and Illinois.
09 Minneapolis. Minnesota, Montana, North Dakota, South Dakota, twenty-six counties in northwestern Wisconsin, and the Upper Peninsula of Michigan
10 Kansas City. Colorado, Kansas, Nebraska, Oklahoma, Wyoming, northern New Mexico, and Western Missouri
11 Dallas District. Texas, northern Louisiana, and southern New Mexico
12 San Francisco District. Nine western states–Alaska, Arizona, California, Hawaii, Idaho, Nevada, Oregon, Utah, and Washington–and American Samoa,
Important:
In the case of the HSBC routing number, it starts with the “02” code. That phone number database means it is somewhere around the New York area. So at least that part is already clear.

The next two digits will be about the State where a Federal Reserve branch is located. This will be the branch that will or can process the transaction and funds for a designated account number.

important
The number “10” means around the Kansas area. You could easily search Google for this information.

The next four digits will be a bit of a challenge since that four digits represent the numeral code for the name of the bank. Since in this topic, we are talking about HSBC, that much is enough explanation.