QWEST CORP

Disclosure Controls and Procedures

We maintain disclosure controls and procedures (as defined in Rule 13a-15(e) and Rule 15d-15(e) promulgated under the Securities Exchange Act of 1934, as amended (the "Exchange Act")) designed to provide reasonable assurance that the information required to be disclosed by us in the reports we file or submit under the Exchange Act is recorded, processed, summarized, and reported within the time periods specified in the SEC’s rules and forms. These include controls and procedures designed to ensure this information is accumulated and communicated to our senior leadership team, including our Chief Executive Officer and our President and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure. Our management, with the participation of our Chief Executive Officer, and our President and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as of March 31, 2026. Based on this evaluation, our Chief Executive Officer and our President and Chief Financial Officer concluded that, as of March 31, 2026, our disclosure controls and procedures were effective at a reasonable assurance level.

Inherent Limitations of Disclosure Controls and Procedures

The effectiveness of our or any system of disclosure controls and procedures is subject to certain limitations, including the exercise of judgment in designing, implementing, and evaluating the controls and procedures, the assumptions used in identifying the likelihood of future events and the inability to eliminate misconduct completely. As a result, there can be no assurance that our disclosure controls and procedures will detect all errors or fraud. By their nature, our or any system of disclosure controls and procedures can provide only reasonable assurance regarding management's control objectives.

Changes in Internal Control Over Financial Reporting

During the three months ended March 31, 2026, the Company continued to implement the new enterprise resource planning (“ERP”) system. The ERP system implementation is substantially complete, with the final phase live in the second quarter of 2026. The Company expects to continue post‑implementation refinements to processes and controls during 2026. The ERP implementation included changes to transaction processing and financial reporting systems and controls over these new systems. The Company will continue to monitor further changes during subsequent periods to evaluate the effectiveness of internal control over financial reporting.

Except for changes in controls related to the ERP implementation noted above, there have been no other changes in the Company’s internal control over financial reporting during the three months ended March 31, 2026 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.