UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March, 2023 Commission File Number: 001-09531 Telefónica, S.A. (Translation of registrant's name into English) Distrito Telefónica, Ronda de la Comunicación s/n, 28050 Madrid, Spain +34 91-482 87 00 (Address of principal executive offices) Indicate by check mark whether the registrant files or will file ...