What is the Parcel Identification? Eg: 01-01-1-000-001.001

(From Tax Assessors Page)

Each parcel of land in Jefferson County is assigned a unique identification
number to geographically locate it on our tax maps, access assessment,
appraisal, and payment data. Jefferson County is divided into 44 Townships.
Within each six-mile square, are thirty-six "Sections", approximately one
square mile, numbered 01 through 36. The first two digits of the parcel
number is an arbitrary township number, the second two digits is the section
number, the third one digit number is the quarter section, the fourth three
digit number is the block number and the fifth six digit number is the parcel
number.

Jefferson County Township Map
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Alabama Property Tax Information