Likely just a phishing expedition, but check your credit report to make sure no one opened any accounts in your name.
The call centers get bombarded, including quite a few calls from people trying to fraudulently gain access to account info, the CSR’s are trained to be tight lipped.
Hope this helps.
Use MyFICO to watch your credit for you. They’ll notify you if/when an account is opened in your name and runs about $5/mo.