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

**Action Urgency Score:** 30/100

| Field | Value |
|---|---|
| Agency | Federal Communications Commission |
| Type | Final rule |
| Action | Final rule. |
| Published | 2026-07-31 |
| Effective | 2026-09-29 |
| Significant | No |
| CFR parts | 47 CFR 1, 47 CFR 25, 47 CFR 27 |
| Summary | In this document, the Federal Communications Commission (Commission) adopted a Report and Order, Order of Proposed Modification, and Order on Reconsideration (Order), that expands the ecosystem for next-generation wireless services in the 3.7-4.2 GHz band (C-band) by making 160 megahertz of the 3.98-4.2 GHz band (Upper C- band) available for terrestrial wireless flexible use. This action is pursuant to Congress' direction in the One Big Beautiful Bill Act to complete a system of competitive bidding by July 4, 2027, for at least 100 megahertz of spectrum in the 3.98-4.2 GHz band. The Order crea |
| Document number | 2026-15598 |

## Why this score
- Final rule.

Source: Federal Register API (Office of the Federal Register) (https://www.federalregister.gov/documents/2026/07/31/2026-15598/upper-c-band-398-42-ghz-expanding-flexible-use-of-the-37-to-42-ghz-band). Last refreshed: 2026-11-04T21:40:49.974Z.
Data from the Federal Register API; the published Federal Register document is authoritative. Informational only, not legal advice.