Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the Registration Statement (Form S-8) pertaining to the Verizon Savings and Security Plan for Mid-Atlantic Associates of our reports dated February 23, 2018, with respect to the consolidated financial statements of Verizon Communications Inc. (Verizon), and the effectiveness of internal control over financial reporting of Verizon, incorporated by reference in its Annual Report (Form 10-K) for the year ended December 31, 2017 and the financial statement schedule of Verizon included therein, filed with the Securities and Exchange Commission.

/s/ Ernst & Young LLP

Ernst & Young LLP

New York, New York

March 7, 2018