I could have written the exact same post as you. Another phone number I’ll never forget, for the same reason, was that of Empire’s competitor, Lincoln Carpeting: N-A-2-9000. (”When you’re thinking...Lincoln Lincoln...better carpeting for less...call National Two Nine Thousand, National Two Nine (riiiing!) Thousand.”)
Yup, remember that one, too. I presume you got WGN on your cable system in the ‘80s.