scriptjunkie@Lee_Holmes "the age of your oldest credit account, the age of your newest credit account and the average age of all your accounts" is average length of debt holding. I just checked against my own credit report and elsewhere online confirms utility bills "are not credit accounts" and do not factor into length of credit history.
"utility bills typically have no impact on your credit score because the information is not generally reported to credit bureaus as they are not credit accounts. However, if you become delinquent in paying your utility bills, the utilities companies could report the late payments to the credit bureaus" https://www.investopedia.com/ask/answers/12/paying-utility-bills-improve-credit.asp
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