Delaware SSN lookup
Area numbers assigned to Delaware fell in these old-system blocks: 221-222. Use this page to see which prefixes matched Delaware and then check an individual number.
221-222
Published area blocks tied to this lookup page.
2
Distinct area numbers in this assignment block.
Location match
Use these prefixes to see whether the first three digits point to Delaware before you run a full lookup.
The first three digits of an old-style SSN could point to Delaware when they fell inside one of these published ranges.
221-222
Areas 221 through 222
These rows show the issued area and group combinations linked to Delaware. 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 |
|---|---|---|---|---|
| 221-01-#### | 1936 | 1950 | 76 to 108 yrs | Valid |
| 221-03-#### | 1936 | 1950 | 76 to 108 yrs | Valid |
| 221-05-#### | 1936 | 1950 | 76 to 108 yrs | Valid |
| 221-07-#### | 1936 | 1950 | 76 to 108 yrs | Valid |
| 221-09-#### | 1936 | 1950 | 76 to 108 yrs | Valid |
| 221-10-#### | 1936 | 1950 | 76 to 108 yrs | Valid |
| 221-12-#### | 1936 | 1950 | 76 to 108 yrs | Valid |
| 221-14-#### | 1936 | 1950 | 76 to 108 yrs | Valid |
| 221-16-#### | 1936 | 1950 | 76 to 108 yrs | Valid |
| 221-18-#### | 1936 | 1950 | 76 to 108 yrs | Valid |
| 221-20-#### | 1936 | 1950 | 76 to 108 yrs | Valid |
| 221-22-#### | 1938 | 1951 | 75 to 106 yrs | Valid |
| 221-24-#### | 1940 | 1953 | 73 to 104 yrs | Valid |
| 221-26-#### | 1942 | 1954 | 72 to 102 yrs | Valid |
| 221-28-#### | 1944 | 1956 | 70 to 100 yrs | Valid |
| 221-30-#### | 1946 | 1957 | 69 to 98 yrs | Valid |
| 221-32-#### | 1948 | 1958 | 68 to 96 yrs | Valid |
| 221-34-#### | 1950 | 1960 | 66 to 94 yrs | Valid |
| 221-36-#### | 1952 | 1961 | 65 to 92 yrs | Valid |
| 221-38-#### | 1954 | 1963 | 63 to 90 yrs | Valid |
| 221-40-#### | 1957 | 1964 | 62 to 87 yrs | Valid |
| 221-42-#### | 1959 | 1965 | 61 to 85 yrs | Valid |
| 221-44-#### | 1961 | 1967 | 59 to 83 yrs | Valid |
| 221-46-#### | 1963 | 1968 | 58 to 81 yrs | Valid |
| 221-48-#### | 1965 | 1970 | 56 to 79 yrs | Valid |
| 221-50-#### | 1967 | 1971 | 55 to 77 yrs | Valid |
| 221-52-#### | 1969 | 1972 | 54 to 75 yrs | Valid |
| 221-54-#### | 1971 | 1974 | 52 to 73 yrs | Valid |
| 221-56-#### | 1973 | 1975 | 51 to 71 yrs | Valid |
| 221-58-#### | 1975 | 1977 | 49 to 69 yrs | Valid |
If an SSN starts with one of the prefixes above, Delaware 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: 221-01-0001
Enter a full SSN to check whether it fits the old record for Delaware.