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3450-3550 MHz

Last updated December 12, 2022

Effective November 22, 2022, within the Cooperative Planning Area of Little Rock, Arkansas, the Department of Defense (DoD) requires coordination only in the lower 40 megahertz of the band (i.e., 3450-3490 MHz); coordination in the upper 60 megahertz (i.e., 3490-3550 MHz) in the Little Rock CPA is no longer required.

KML file of CPA and PUA

  • The Department of Defense email address "osd.pentagon.dod-cio.mbx.emsepp---3450-3550-mhz@mail.mil" is the official entry point for general enquiries related to this band, and to request informal non-binding discussion.
  • Before engaging in discussions and coordination with the DoD, licensees and the DoD must enter into a nondisclosure agreement (NDA) to protect proprietary, confidential, and/or controlled unclassified information (CUI) exchanged therein.
  • DoD's portal, https://www.345ipic.com, is the primary conduit for licensees to successfully coordinate with DoD prior to operating in Cooperative Planning Areas (CPA). The portal also facilitates development of Operator-to-Operator Agreements, which may be used to codify the processes and procedures for successful coordination in Periodic Use Areas (PUA). To request a portal account, send an email to osd.pentagon.dod-cio.mbx.emsepp---3450-3550-mhz@mail.mil.

The Beat CHINA for 5G Act of 2020 requires that the non-federal allocation for 3450-3550 MHz be revised to permit flexible-use services. The Act also requires that an auction of 3450-3550 MHz band begin no later December 31, 2021.

On July 12, 2021, DoD held a workshop to provide potential bidders in the upcoming FCC auction with information about ongoing DoD operations in the 3.45-3.55 GHz band that will require coordination.  In addition, DoD has distributed controlled unclassified information (CUI) via the Department of Homeland Security (DHS) Cybersecurity and Infrastructure Security Agency (CISA) National Coordinating Center for Communications (NCC).  Entities that are not NCC members can access DoD’s CUI by signing the FCC’s Protective Order in accordance with instructions in the Protective Order accompanying Public Notice.

On June 3, 2021, as required by 47 U.S.C. § 923(h)(5), NTIA posted the publicly releasable approved transition plans along with additional transition information provided by DOD.  On July 23, NTIA posted updates to the DOD Workbook and Workbook Explanation, and archived the prior versions.

Transition Plans and Transition Data for the 3450-3550 MHz Band

On June 2, 2021, NTIA and FCC, through its Wireless Telecommunications Bureau, jointly issued a Public Notice that provides (i) information for potential bidders in the upcoming 3.45 GHz Service auction and (ii) guidance to the ultimate 3.45 GHz Service licensees and the affected federal incumbents regarding coordination procedures for shared use of the 3.45 GHz band. 

On February 19, 2021, as a result of the further collaborative efforts between NTIA, the Department of Defense (“DoD”), and the FCC, NTIA submitted a letter into the FCC Docket “Amendment of the Commission’s Rules with Regard to Facilitating Shared Use in the 3100-3550 MHz Band” providing spectrum management details of DoD’s Cooperative Planning Area and Periodic Use Area set forth in the Further Notice of Proposed Rulemaking. In addition, specific requirements for two of the Cooperative Planning Areas, more details on federal/non-federal coordination procedures, and other information and views for the record is provided.

On January 14, 2021, NTIA provided initial estimated relocation or sharing costs and timelines for the 3450-3550 MHz spectrum band to the Committees on Appropriations and Energy and Commerce of the House of Representatives, and to the Committees on Appropriations and Commerce, Science, and Transportation of the Senate for approval, and notified the Federal Communications Commission and Comptroller General.

Related content


NTIA Letter to FCC re 3450-3550 MHz

February 22, 2021
WT Docket No. 19-348

As a result of the further collaborative efforts between NTIA, the Department of Defense (“DoD”), and the FCC, NTIA submitted a letter into the FCC Docket “Amendment of the Commission’s Rules with Regard to Facilitating Shared Use in the 3100-3550 MHz Band” providing spectrum management details of DoD’s Cooperative Planning Area (“CPA”) and Periodic Use Area (“PUA”) set forth in the Further Notice of Proposed Rulemaking (“FNPRM”).   In addition, specific requirements for two of the CPAs, more details on Federal/non-Federal coordination procedures, and other information and views for the rec

NTIA Notice of Estimated Relocation or Sharing Costs and Timelines for 3450-3550 MHz Band

January 15, 2021

On June 12, 2020, the FCC notified NTIA of its plan to auction licenses in 100 megahertz of the 3400-3550 MHz band beginning in December 2021. On January 14, 2021, NTIA provided initial estimated relocation or sharing costs and timelines for the 3450-3550 MHz spectrum band to the Committees on Appropriations and Energy and Commerce of the House of Representatives, and to the Committees on Appropriations and Commerce, Science, and Transportation of the Senate for approval, and notified the Federal Communications Commission and Comptroller General.

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