Exhibit 12

QWEST CORPORATION

CALCULATION OF RATIO OF EARNINGS TO FIXED CHARGES

(Unaudited)



|                                                                                                                                       |  |                                   |       |   |                          |   |       |      |  |   |       |   |  |      |       |   |  |   |       |   |  |   |       |  
|-------------------------------------------------------------------------------------------------------------------------------------- |  | --------------------------------- | ----- | - | ------------------------ | - | ----- | ---- |  | - | ----- | - |  | ---- | ----- | - |  | - | ----- | - |  | - | ----- | -
|                                                                                                                                       |  | Nine MonthsEndedSeptember 30,2006 |       |   | Years Ended December 31, |  
|                                                                                                                                       |  | 2005                              |       |   | 2004                     |   |       | 2003 |  |   | 2002  |   |  | 2001 |      
|                                                                                                                                       |  | (Dollars in millions)             |      
|Income from continuing operations before income taxes, discontinued operations and cumulative effect of change in accounting
principle |  | $                                 | 1,297 |   |                          | $ | 1,530 |      |  | $ | 1,742 |   |  | $    | 1,758 |   |  | $ | 2,435 |   |  | $ | 2,833 |  
|Add: estimated fixed charges                                                                                                           |  |                                   | 503   |   |                          |   | 668   |      |  |   | 647   |   |  |      | 643   |   |  |   | 634   |   |  |   | 588   |  
|Add: estimated amortization of capitalized interest                                                                                    |  |                                   | 9     |   |                          |   | 12    |      |  |   | 12    |   |  |      | 13    |   |  |   | 14    |   |  |   | 14    |  
|Less: interest capitalized                                                                                                             |  |                                   | (6    | ) |                          |   | (7    | )    |  |   | (9    | ) |  |      | (13   | ) |  |   | (24   | ) |  |   | (44   | )
|                                                                                                                                       |  |                                   |       |   |                          |   |       |      |  |   |       |   |  |      |       |   |  |   |       |   |  |   |       |  
|Total earnings available for fixed charges                                                                                             |  | $                                 | 1,803 |   |                          | $ | 2,203 |      |  | $ | 2,392 |   |  | $    | 2,401 |   |  | $ | 3,059 |   |  | $ | 3,391 |  
|                                                                                                                                       |  |                                   |       |   |                          |   |       |      |  |   |       |   |  |      |       |   |  |   |       |   |  |   |       |  
|                                                                                                                                       |  |                                   |       |   |                          |  
|Estimate of interest factor on rentals                                                                                                 |  | $                                 | 34    |   |                          | $ | 54    |      |  | $ | 54    |   |  | $    | 57    |   |  | $ | 69    |   |  | $ | 79    |  
|Interest expense, including amortization of premiums, discounts and debt issuance costs                                                |  |                                   | 463   |   |                          |   | 607   |      |  |   | 584   |   |  |      | 573   |   |  |   | 541   |   |  |   | 465   |  
|Interest capitalized                                                                                                                   |  |                                   | 6     |   |                          |   | 7     |      |  |   | 9     |   |  |      | 13    |   |  |   | 24    |   |  |   | 44    |  
|                                                                                                                                       |  |                                   |       |   |                          |   |       |      |  |   |       |   |  |      |       |   |  |   |       |   |  |   |       |  
|Total fixed charges                                                                                                                    |  | $                                 | 503   |   |                          | $ | 668   |      |  | $ | 647   |   |  | $    | 643   |   |  | $ | 634   |   |  | $ | 588   |  
|                                                                                                                                       |  |                                   |       |   |                          |   |       |      |  |   |       |   |  |      |       |   |  |   |       |   |  |   |       |  
|                                                                                                                                       |  |                                   |       |   |                          |  
|Ratio of earnings to fixed charges                                                                                                     |  |                                   | 3.6   |   |                          |   | 3.3   |      |  |   | 3.7   |   |  |      | 3.7   |   |  |   | 4.8   |   |  |   | 5.8   |