What is an SSN area number?

It's the first three digits of a Social Security number. For numbers issued before June 25, 2011, the area number identified the state or territory that issued the card.

Which area numbers were never used?

Area number 000 was never valid, 666 was never assigned, and numbers above 772 have not been issued. Group 00 and serial 0000 are also invalid in any SSN.

Why don't new SSNs follow this list?

Since June 2011 the SSA assigns area numbers randomly, so a recent number's first three digits no longer reveal where it was issued. This list applies to numbers issued before randomization.

SSN Area Numbers: Full List

All area-number ranges, sorted low to high

Every Social Security number begins with a three-digit area number. The table below lists each range in order and the state, territory, or program it was assigned to before randomization began in 2011. To look up which place a number maps to, you can also use the SSN validator.

Area numbers	Assigned to	Type
001-003	New Hampshire	State
004-007	Maine	State
008-009	Vermont	State
010-034	Massachusetts	State
035-039	Rhode Island	State
040-049	Connecticut	State
050-134	New York	State
135-158	New Jersey	State
159-211	Pennsylvania	State
212-220	Maryland	State
221-222	Delaware	State
223-231	Virginia	State
232	North Carolina	State
232-236	West Virginia	State
237-246	North Carolina	State
247-251	South Carolina	State
252-260	Georgia	State
261-267	Florida	State
268-302	Ohio	State
303-317	Indiana	State
318-361	Illinois	State
362-386	Michigan	State
387-399	Wisconsin	State
400-407	Kentucky	State
408-415	Tennessee	State
416-424	Alabama	State
425-428	Mississippi	State
429-432	Arkansas	State
433-439	Louisiana	State
440-448	Oklahoma	State
449-467	Texas	State
468-477	Minnesota	State
478-485	Iowa	State
486-500	Missouri	State
501-502	North Dakota	State
503-504	South Dakota	State
505-508	Nebraska	State
509-515	Kansas	State
516-517	Montana	State
518-519	Idaho	State
520	Wyoming	State
521-524	Colorado	State
525	New Mexico	State
526-527	Arizona	State
528-529	Utah	State
530	Nevada	State
531-539	Washington	State
540-544	Oregon	State
545-573	California	State
574	Alaska	State
575-576	Hawaii	State
577-579	District of Columbia	State
580-584	Puerto Rico	Territory
580	Virgin Islands	Territory
585	New Mexico	State
586	American Samoa	Territory
586	Guam	Territory
586	Philippine Islands	Historic
587-588	Mississippi	State
589-595	Florida	State
596-599	Puerto Rico	Territory
600-601	Arizona	State
602-626	California	State
627-645	Texas	State
646-647	Utah	State
648-649	New Mexico	State
650-653	Colorado	State
654-658	South Carolina	State
659-665	Louisiana	State
667-675	Georgia	State
676-679	Arkansas	State
680	Nevada	State
681-690	North Carolina	State
691-699	Virginia	State
700-728	Railroad Board	Program
729-733	Enumeration at Entry	Program
750-751	Hawaii	State
752-755	Mississippi	State
756-763	Tennessee	State
764-765	Arizona	State
766-772	Florida	State

How to read this list

Ranges are sorted low to high. Most map to a single state or territory, but a few are special: numbers were issued in blocks as each area filled up, so a fast-growing state holds several non-adjacent ranges. State and territory rows link to that place's full prefix page with sample number patterns.

Some numbers never appear here because they were never valid: 000, 666, and 900-999 were never used as area numbers, and group 00 or serial 0000 are invalid in any SSN. To check a specific number against the published record, use the SSN validator; to understand what the digits mean, see how to read an SSN.

None of this applies to numbers issued after June 25, 2011, randomization ended the link between area numbers and places.

Frequently asked questions

What is an SSN area number?: It's the first three digits of a Social Security number. For numbers issued before June 25, 2011, the area number identified the state or territory that issued the card.
Which area numbers were never used?: Area number 000 was never valid, 666 was never assigned, and numbers above 772 have not been issued. Group 00 and serial 0000 are also invalid in any SSN.
Why don't new SSNs follow this list?: Since June 2011 the SSA assigns area numbers randomly, so a recent number's first three digits no longer reveal where it was issued. This list applies to numbers issued before randomization.