For example, the ending of the stereo version has an early fade out, whereas the mono version does not. This song is the only song in the Beatles catalogue where the multi-track master tapes are available that has not received a stereo mix of the original edit. "What's the New Mary Jane" was not officially issued by the Beatles until the release of Anthology 3 in 1996, although the song previously appeared on several bootleg records.
John Lennon came up with the lyric/title after seeing a phone book. He said: "You Know My Name (Look Up the Number)" was the last Beatles song from the group's official canon to be included on an album, issued on an LP for the first time on Rarities (which had been included as a bonus disc in the British and American boxed set, The Beatles Collection in 1978, and released separately as an album in the United Kingdom in 1979). The first American album to contain "You Know My Name (Look Up the Number)" was the US version of Rarities, which was issued by Capitol Records in 1980.
 The band Yellow Matter Custard covered the song for their CD/DVD release One Night In New York City.
 Nick Webb, second engineer on the 30 April session described it this way:
 The song is in the key of D. The "You know" involves F ♯–D ♯ melody notes against a I (D chord). A point of interest is the raised A melody note against a D/F ♯ chord on "name", "three" and "name".
 A significant moment is the Tonicization of the dominant with the use of vii o 7/V chord (G ♯dim) as part of the progression to V 7 (A 7 chord on "You know my name") and I (D chord after "number") that closes the verse.  The song is also notable for use of the 5th chord tone on the VII chord to produce extra dissonance.  Recording [ edit ] Although eventually released as a Beatles song, "You Know My Name (Look Up the Number)" was nearly released as the A-side of a Plastic Ono Band single.
Lennon was determined to have this song and " What's the New Mary Jane" (a Beatles outtake from The Beatles sessions recorded by Lennon and Yoko Ono with George Harrison in August 1968) released, and he arranged for Apple to issue both unorthodox songs on a Plastic Ono Band single.  On 26 November 1969, four months after contributor Brian Jones drowned in his swimming pool,  Lennon edited "You Know My Name (Look Up the Number)", reducing the length from 6:08 to 4:19, a more suitable length for a single. The Plastic Ono Band single was given an Apple catalogue number (Apples 1002) and British release date (5 December 1969).
 McCartney once told Beatles recording analyst Mark Lewisohn, "[People] are only just discovering things like 'You Know My Name (Look Up the Number)' — probably my favourite Beatles' track!"  He went on to explain: The song was not released for another year.
I said, 'What's the words?' and he replied 'You know my name look up the number'. I asked, 'What's the rest of it?' 'No, no other words, those are the words. And I want to do it like a mantra!'  A saxophone part was recorded on 8 June  which was played by Brian Jones of the Rolling Stones.
   The lounge section includes a reference to Denis O'Dell, associate producer on the A Hard Day's Night film, whom Lennon had also worked with on How I Won the War.  Partway through the song, Lennon introduces McCartney as lounge singer "Denis O’Bell. " The reference prompted numerous telephone calls to O'Dell's home by fans who told him, "We have your name and now we've got your number," as well as personal visits by fans wanting to live with him.
 Musical structure [ edit ]
 Three months later, the song was released as the B-side to the Beatles' single, "Let It Be", but mistitled as "You Know My Name (Look Up My Number)" on the label of the record itself (the correct title appeared on the record sleeve, however). The original Plastic Ono Band single catalogue number is visible, though scratched out, in the runout groove of the original British pressings of the "Let It Be" single.   Personnel [ edit ]
Even at this time I was thinking 'What are they doing with this old four-track tape, recording these funny bits onto this quaint song?' But it was a fun track to do.