Colorado SSN lookup
Area numbers assigned to Colorado fell in these old-system blocks: 521-524, 650-653. Use this page to see which prefixes matched Colorado and then check an individual number.
This is page 13 of 18. The rows on this page run from 524-29-#### to 524-87-####.
521-524, 650-653
Published area blocks tied to this lookup page.
8
Distinct area numbers in this assignment block.
Location match
Use these prefixes to see whether the first three digits point to Colorado before you run a full lookup.
The first three digits of an old-style SSN could point to Colorado when they fell inside one of these published ranges.
521-524
Areas 521 through 524
650-653
Areas 650 through 653
These rows show the issued area and group combinations linked to Colorado. Open any pattern as a full lookup by swapping in the last four digits.
| Social Security number | First year | Last year | Likely age today | Status |
|---|---|---|---|---|
| 524-29-#### | 1979 | 1980 | 46 to 65 yrs | Valid |
| 524-31-#### | 1980 | 1981 | 45 to 64 yrs | Valid |
| 524-33-#### | 1981 | 1982 | 44 to 63 yrs | Valid |
| 524-35-#### | 1981 | 1983 | 43 to 63 yrs | Valid |
| 524-37-#### | 1982 | 1984 | 42 to 62 yrs | Valid |
| 524-39-#### | 1983 | 1984 | 42 to 61 yrs | Valid |
| 524-41-#### | 1983 | 1985 | 41 to 61 yrs | Valid |
| 524-43-#### | 1984 | 1986 | 40 to 60 yrs | Valid |
| 524-45-#### | 1985 | 1987 | 39 to 59 yrs | Valid |
| 524-47-#### | 1985 | 1987 | 39 to 59 yrs | Valid |
| 524-49-#### | 1986 | 1988 | 38 to 58 yrs | Valid |
| 524-51-#### | 1986 | 1988 | 38 to 58 yrs | Valid |
| 524-53-#### | 1987 | 1989 | 37 to 57 yrs | Valid |
| 524-55-#### | 1987 | 1990 | 36 to 57 yrs | Valid |
| 524-57-#### | 1988 | 1990 | 36 to 56 yrs | Valid |
| 524-59-#### | 1988 | 1991 | 35 to 56 yrs | Valid |
| 524-61-#### | 1989 | 1991 | 35 to 55 yrs | Valid |
| 524-63-#### | 1989 | 1992 | 34 to 55 yrs | Valid |
| 524-65-#### | 1990 | 1993 | 33 to 54 yrs | Valid |
| 524-67-#### | 1990 | 1993 | 33 to 54 yrs | Valid |
| 524-69-#### | 1991 | 1994 | 32 to 53 yrs | Valid |
| 524-71-#### | 1991 | 1994 | 32 to 53 yrs | Valid |
| 524-73-#### | 1992 | 1995 | 31 to 52 yrs | Valid |
| 524-75-#### | 1993 | 1995 | 31 to 51 yrs | Valid |
| 524-77-#### | 1993 | 1996 | 30 to 51 yrs | Valid |
| 524-79-#### | 1994 | 1996 | 30 to 50 yrs | Valid |
| 524-81-#### | 1994 | 1997 | 29 to 50 yrs | Valid |
| 524-83-#### | 1995 | 1997 | 29 to 49 yrs | Valid |
| 524-85-#### | 1997 | 1998 | 28 to 47 yrs | Valid |
| 524-87-#### | 1998 | 1999 | 27 to 46 yrs | Valid |
This page covers issued SSN patterns for Colorado from 524-29-#### to 524-87-####. If you are scanning older prefixes or comparing issue-year ranges, this gives you a faster way to narrow the search.
Each row represents a valid issued area and group combination under the old system. Open any row to run a full number check and see the likely location and year range.
If an SSN starts with one of the prefixes above, Colorado is a likely issue location under the old system.
To check the number further, run the full nine digits through the checker. The result page can then tell you whether the group fits the published record and what year range the number most likely falls into.
Example old-style prefix for this page: 521-01-0001
Enter a full SSN to check whether it fits the old record for Colorado.