What dose the callerID numbers mean on a letters I've received from the IRS

[TomK]

Perhaps this may help: https://www.irs.gov/individuals/understanding-your-irs-notice-or-letter

[lauriekillen]

No help 

[Anonymous]

Would you provide us with the code or number you are referring to so we can better assist you?

[Tiffany33]

Is this my pin number?

[frankschuler]

Is this a pin number

[xmasbaby0]

@frankschuler No one can see your screen.  We do not know what number you are asking about or where you are seeing it.