What are the SSN prefixes for Connecticut?

Connecticut was assigned the area-number range 040-049. A Social Security number issued there before 2011 begins with one of these three-digit numbers.

Does an SSN starting with 040 mean the person is from Connecticut?

For cards issued before June 25, 2011, an SSN whose first three digits fall in Connecticut's range was issued in Connecticut, usually based on the mailing address on the application, not necessarily birthplace. Numbers issued after randomization carry no location meaning.

How can I check a specific number?

Use the SSN checker to enter a full number and see whether its structure is valid, which state it maps to, and a rough estimate of when it was issued.

Social Security Number Prefixes for Connecticut

Area numbers 040-049

area range: 1
lowest area number: 040
highest area number: 049
area numbers: 10

Connecticut was assigned the Social Security area-number range 040-049. Before SSA randomized number assignment in June 2011, any SSN beginning with one of these three-digit prefixes was issued in Connecticut, generally based on the mailing address on the application. Newer numbers are assigned randomly and no longer indicate a state.

Connecticut area-number ranges

Area-number range	Count
040-049	10

Sample Connecticut SSN patterns

Estimated issue years for the lowest area/group combinations (illustrative):

Pattern	Estimated issued	Status
040-01-####	1936-1950	Valid
040-03-####	1936-1950	Valid
040-05-####	1936-1950	Valid
040-07-####	1936-1950	Valid
040-09-####	1936-1950	Valid
040-10-####	1936-1950	Valid
040-12-####	1936-1950	Valid
040-14-####	1936-1950	Valid
040-16-####	1936-1950	Valid
040-18-####	1936-1950	Valid
040-20-####	1936-1950	Valid
040-22-####	1937-1951	Valid
040-24-####	1939-1952	Valid
040-26-####	1941-1953	Valid
040-28-####	1943-1954	Valid
040-30-####	1944-1956	Valid
040-32-####	1946-1957	Valid
040-34-####	1948-1958	Valid
040-36-####	1950-1960	Valid
040-38-####	1952-1961	Valid
040-40-####	1954-1962	Valid
040-42-####	1956-1964	Valid
040-44-####	1958-1965	Valid
040-46-####	1960-1966	Valid

Frequently asked questions

What are the SSN prefixes for Connecticut?: Connecticut was assigned the area-number range 040-049. A Social Security number issued there before 2011 begins with one of these three-digit numbers.
Does an SSN starting with 040 mean the person is from Connecticut?: For cards issued before June 25, 2011, an SSN whose first three digits fall in Connecticut's range was issued in Connecticut, usually based on the mailing address on the application, not necessarily birthplace. Numbers issued after randomization carry no location meaning.
How can I check a specific number?: Use the SSN checker to enter a full number and see whether its structure is valid, which state it maps to, and a rough estimate of when it was issued.

Check a specific number with the SSN checker, or see all states.