The IRS will have whatever address you listed on the last return you filed.
You cannot call the IRS to verify your address - they will ask you for your address, but will not tell you what address they have in your record.
As @VollvoGirl states above, you can make sure your address is up to date by sending the IRS a Change of Address Form.
How to notify the IRS of an Address Change…. Blank Form 8822 (Change of Address)
