001-01-0001, for example (Abbr.)

• Figure on an IRS form
• ID with two dashes
• W-2 fig
• ID to guard from identity theft
• ID in the form "xxx-xx-xxxx"
• Scam target: Abbr
• Tax form no
• Certain ID info
• Fig. targeted in some hacks

Wikipedia Word definitions in Wikipedia
SSN may refer to: