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1001 Chapter 7:Worker guides • Section 1: Multiple program worker guides (07/2026) Note: This is for informational purposes only. If an SSN is supplied, it should be entered into the ONE system for verification purposes. The Social Security Administration (SSA) changed the way Social Security Numbers (SSNs) are issued on June 25, 2011. This change is referred to as “randomization.” SSN randomization affected the SSN assignment process in the following ways: • It eliminated the geographical significance of the first three digits of the SSN, referred to as the area number, by no longer allocating the area numbers for assignment to individuals in specific states. • It eliminated the significance of the highest group number and, as a result, the High Group List is frozen in time and can only be used to see the area and group numbers SSA issued prior to the randomization implementation date. • Previously unassigned area numbers were introduced for assignment excluding area numbers 000, 666 and 900-999. The first three digits of the social security number indicate the state in which the card was issued: Number Issuing State Number Issuing State 001-003 New Hampshire 516-517 Montana 004-007 Maine 518-519 Idaho 008-009 Vermont 520 Wyoming 010-034 Massachusetts 521-524 Colorado 035-039 Rhode Island 525 New Mexico 040-049 Connecticut 526-527 Arizona 050-134 New York 528-529 Utah 135-158 New Jersey 530 Nevada 159-211 Pennsylvania 531-539 Washington