- - XXX-XX-XXXX ID
- - ID no. used to e-file
- - common id with nine digits
- - Loan application ID
- - Nine-digit govt ID [Abbr]
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- - (xxx)xxx-xxxx no.
- - Arabic hill; phone no.
- - no. on a card
- - contacts list no.
- - No. to call
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- - figs. in the format xxx-xx-xxxx
- - SINS equivalents in The States
- - IDs since the Great Depression
- - figs. used for stimulus-check eligibility
- - IDs targeted in identity theft (Abbr.)
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- - XXXXIII times XIV
- - 602, in Roman numerals
- - Roman 602
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- - Org. that uses the pattern XXX-XX-XXXX
- - Org. that determines Medicare eligibility
- - Disability benefits org.
- - Org. created under F.D.R.
- - US agency that manages public retirement benefits
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- - XXXXX, to the Greeks
- - greek letters that look like xs
- - X's, to Athena
- - Greek X's
- - Greek Xs
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