Verify a Social Security Number

Check whether an SSN is valid, see the likely issue location, and view the issue year range in one quick lookup.

Check an SSN

Enter any 9-digit SSN to check validity, likely location, and year range.

Browse SSN lookup by state

Start with the state pages if you want to see which area numbers matched a state before checking a full number.

New York

050-134

85 area numbers in this block

California

545-573, 602-626

54 area numbers in this block

Pennsylvania

159-211

53 area numbers in this block

Illinois

318-361

44 area numbers in this block

Texas

449-467, 627-645

38 area numbers in this block

Ohio

268-302

35 area numbers in this block

Browse all state lookup pages

Common SSN questions

These pages answer the follow-up questions people usually have after running a lookup.

How to read an SSN

Learn what the area, group, and serial parts of an old-style Social Security number meant before randomization.

How many SSNs were possible under the old system

See how many old-style Social Security numbers were possible before randomization and why numbers were not simply counted from 000-00-0001 upward.

How Social Security numbers were issued

Understand how old-style Social Security numbers were assigned by area and group before randomization changed the system in 2011.

SSN vs EIN vs ITIN

See the difference between a Social Security number, an Employer Identification Number, and an Individual Taxpayer Identification Number.

SSN randomization explained

See what changed when Social Security number randomization began in June 2011 and why older lookup tools stop at the pre-randomization record.

Start with a number

Start with a place

Social Security offices by state

New Hampshire lookup

California lookup

Start with a question

How to read an SSN

What SSN randomization changed

How many SSNs were possible