Date of Publication Jan-March18 Results

NOTICE

January-March 2018 Results

Earnings Release

Date: Thursday, April 26th, 2018

Time: 07:30 (Madrid time)

Conference Call

Date: Thursday, April 26th, 2018

Time: 10:00 (Madrid time)

09:00 (London time)

04:00 (NY time)

To be webcast live over the internet

You can log in via our website at:

https://www.telefonica.com/en/web/shareholders-investors

To listen to the call, we kindly suggest you access the webcast via Telefónica's website.

To participate in the Q&A session, please dial in 10 minutes before the start of the conference call on one of the following numbers:

From Spain: +34 91 114 7293

From the United States: +1 646 828 8156

From the U.K. and other countries: +44 (0)330 336 9105

Conference Code: 3053231

If you have any questions, please do not hesitate to contact Elena Romero at elena.romerocanas@telefonica.com, or at phone number +34 91 482 87 00.