2026-22037·FEDERAL COMMUNICATIONS COMMISSION

Upper C-Band (3.98-4.2 GHz); Expanding Flexible Use of the 3.7 to 4.2 GHz Band

Final RuleEffective

Published: Oct 29, 2026
Effective: Oct 29, 2026
Citation: 91 FR 68055
Docket: GN Docket Nos. 18-122 and 25-59, FCC 26-46, FR ID 374445

Final rule; announcement of effective date.

Summary

The Federal Communications Commission (FCC) has adopted a final rule that expands “flexible use” of the upper portion of the C‑band spectrum, specifically the 3.98‑4.2 GHz frequencies within the broader 3.7‑4.2 GHz band. The change is meant to accommodate a wider variety of wireless services—such as 5G mobile broadband, satellite communications, and other emerging technologies—while preserving existing users’ rights. By making the band more adaptable, the FCC aims to promote more efficient use of spectrum and support the nation’s growing demand for high‑speed connectivity. The rule was issued by the FCC, the federal agency that regulates interstate and international communications. It applies to current license holders in the C‑band, prospective applicants, and any companies that will deploy equipment or services using the newly flexible frequencies. The regulation also confirms that the Office of Management and Budget (OMB) has approved the associated information‑collection requirements (OMB Control No. 3060‑1272), which will govern reporting and compliance obligations for affected parties. The rule became effective on October 29, 2026, the same day it was published in the Federal Register (91 FR 68055). With the effective date now in force, licensees and service providers must follow the new flexible‑use provisions and meet any reporting requirements outlined under the approved OMB collection. No further public comment period is indicated, so the next steps involve industry compliance, filing any required information with the FCC, and the Commission’s ongoing oversight to ensure the spectrum is used as authorized.

AI-generated summary — verify against the Federal Register text.

Official abstract

The Federal Communications Commission (FCC or Commission) announces that the Office of Management and Budget (OMB) has approved the information collection requirements under OMB Control Number 3060- 1272, as adopted in the Commission's Report and Order, Order of Proposed Modification, and Order on Reconsideration, FCC 26-46.