456 Sesame St and the Furry Arms Hotel
The lower level of the building, bearing the address on the door in its first appearance.
456 Sesame Street is an address on Sesame Street. The earliest known reference is in The Sesame Street Treasury, in which it is identified as the home of Betty Lou (in Volume 5), Herry Monster (in Volume 9), and Telly Monster (in Volume 14).
456 Sesame Street later appeared on the show, as a brownstone building, when Sesame Street went Around the Corner in Season 25. The building housed the Day Care Center, which was operated by Angela, who lived in the building with her husband Jamal and their daughter Kayla. When the family departed two years later, Gina opened Gina's Family Day Care on the first floor. This ground floor location had previously been shown to be an unoccupied storefront, but housed an electronics store in the special Sesame Street Stays Up Late.
In Episode 3991, after the Around the Corner sets had been abandoned, the address referred to the apartment building housing Hooper's Store, whose front door lies between the store and Mail It Shop, which was previously (and once again) known as the Fix-It Shop. However, this was later renamed to be 129 Sesame Street.
In the 2017 DVD Trick or Treat on Sesame Street, the address number is applied to Count von Count's castle.