| Item | Obligations |
|---|---|
| Department of Veterans Affairs | $248M |
| Department of Justice | $149M |
| Department of Homeland Security | $129M |
| Department of Transportation | $42.1M |
| Department of the Treasury | $32.8M |
| Department of Defense | $23M |
| Environmental Protection Agency | $14.2M |
| Department of Education | $11.7M |
| Department of Housing and Urban Development | $11.3M |
| General Services Administration | $10.3M |
Department of Veterans Affairs is At and T Enterprises's largest federal customer, with $248M obligated (36.0% of the company's federal obligations).