|                                       |   | Place of      |   |                            |   | Percentage |   |   |
|--------------------------------------------|--------|---------------|--------|---------------------------------|--------|------------|--------|--------|
| Entity Name                                |   | Incorporation |   | Owner                           |   | Ownership  |   |   |
|                                       |   |          |   |                            |   |       |   |   |
| Trust Energy Company, LLC                  |   | Kentucky      |   | Vanguard Natural Gas, LLC       |   | 100        | %      |   |
|                                       |   |          |   |                            |   |       |   |   |
| Ariana Energy, LLC                         |   | Tennessee     |   | Vanguard Natural Gas, LLC       |   | 100        | %      |   |
|                                       |   |          |   |                            |   |       |   |   |
| Vanguard Natural Gas, LLC                  |   | Kentucky      |   | Vanguard Natural Resources, LLC |   | 100        | %      |   |
|                                       |   |          |   |                            |   |       |   |   |
| VNR Holdings, LLC                          |   | Delaware      |   | Vanguard Natural Gas, LLC       |   | 100        | %      |   |
|                                       |   |          |   |                            |   |       |   |   |
| Vanguard Permian, LLC                      |   | Delaware      |   | Vanguard Natural Gas, LLC       |   | 100        | %      |   |
|                                       |   |          |   |                            |   |       |   |   |
| VNR Finance Corp.                          |   | Delaware      |   | Vanguard Natural Resources, LLC |   | 100        | %      |   |
|                                       |   |          |   |                            |   |       |   |   |
| Encore Energy Partners GP LLC              |   | Delaware      |   | Vanguard Natural Resources, LLC |   | 100        | %      |   |
|                                       |   |          |   |                            |   |       |   |   |
| Encore Energy Partners LP                  |   | Delaware      |   | Vanguard Natural Gas, LLC       |   | 45.6       | %      | (1)    |
|                                       |   |          |   |                            |   |       |   |   |
| Encore Energy Partners LP                  |   | Delaware      |   | Encore Energy Partners GP LLC   |   | 1.1        | %      | (2)    |
|                                       |   |          |   |                            |   |       |   |   |
| Encore Energy Partners Operating LLC       |   | Delaware      |   | Encore Energy Partners LP       |   | 100        | %      |   |
|                                       |   |          |   |                            |   |       |   |   |
| Encore Energy Partners Finance Corporation |   | Delaware      |   | Encore Energy Partners LP       |   | 100        | %      |   |
|                                       |   |          |   |                            |   |       |   |   |
| Encore Clear Fork Pipeline LLC             |   | Delaware      |   | Encore Energy Partners LP       |   | 100        | %      |   |

| (1)   | Limited partner interest. |
|-----------------|---------------------------|

| (2)   | General partner interest. |
|-----------------|---------------------------|