Department of Defense
INSTRUCTION
NUMBER 8410.01
December 4, 2015
Incorporating Change 1, Effective June 4, 2021
DoD CIO
SUBJECT: Internet Domain Name and Internet Protocol Address Space Use and Approval
References: See Enclosure 1
1. PURPOSE. This instruction:
a. Reissues DoD Instruction (DoDI) 8410.01 (Reference (a)) in accordance with the
authority in DoD Directive 5144.02 (Reference (b)).
b. Establishes .mil as the top-level domain (TLD) required to be used by the DoD and
policies for its use.
c. Provides procedures for the approval, registration, and use of Internet domains and
Internet protocol (IP) number resources in the DoD.
d. Implements policy and assigns responsibilities to comply with TLD requirements in
Office of Management and Budget (OMB) Memorandum 05-04 (Reference (c)).
2. APPLICABILITY. This instruction:
a. Applies to OSD, the Military Departments, the Office of the Chairman of the Joint Chiefs
of Staff and the Joint Staff, the Combatant Commands, the Office of the Inspector General of the
Department of Defense, the Defense Agencies, the DoD Field Activities, and all other
organizational entities within the DoD (referred to collectively in this instruction as the “DoD
Components”).
b. Does not apply to TLDs used for communications internal to a DoD Component (e.g.,
private local area networks) or to TLDs used for non-operational purposes (e.g., research,
developmental, and testing networks).
