Record window
before November 2003
Date range basis
Estimated from earlier public record
Valid?
478-28-0001 is a valid SSN
What this result tells you
This number fits the published public record for old-style Social Security numbers. The first three
digits point to Iowa (IA), and the group number falls inside the published range for that
area.
The year range helps place the number roughly in time. It is useful for basic checks, research,
and general context.
How the date range was worked out
This range is an estimate based on where this group falls in the public record before November 2003.
Public record window: before November 2003
Why this result came back
The checker compares the area number to the published area chart, then checks whether the group
number is at or below the last published group for that area.
The serial number helps confirm the format, but it does not change the location match or the broad
date range.