| Schedule of long-term debt instruments | 
Our debt as of March 31, 2017 and December 31, 2016 consisted of the following:
 
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Carrying value(a) at
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| Issuer / Borrower |   | Issued |   | Debt |   | Maturity Date |   | Interest Payable |   | Principal Amount at March 31, 2017 |   | March 31, 2017 |   | December 31, 2016 |  
| Sirius XM (b)
 |   | May 2013 |   | 4.25% Senior Notes(the "4.25% Notes")
 |   | May 15, 2020 |   | semi-annually on May 15 and November15 |   | $ | 500,000 | 
 |   | $ | 497,272 | 
 |   | $ | 497,069 | 
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| Sirius XM (b)
 |   | August 2013 |   | 5.75% Senior Notes(the "5.75% Notes")
 |   | August 1, 2021 |   | semi-annually on February 1 and August 1 |   | 600,000 | 
 |   | 596,559 | 
 |   | 596,386 | 
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| Sirius XM (b)
 |   | May 2013 |   | 4.625% Senior Notes(the "4.625% Notes")
 |   | May 15, 2023 |   | semi-annually on May 15 and November 15 |   | 500,000 | 
 |   | 496,243 | 
 |   | 496,111 | 
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| Sirius XM (b)
 |   | May 2014 |   | 6.00% Senior Notes(the "6.00% Notes")
 |   | July 15, 2024 |   | semi-annually on January 15 and July 15 |   | 1,500,000 | 
 |   | 1,486,909 | 
 |   | 1,486,556 | 
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| Sirius XM (b)
 |   | March 2015 |   | 5.375% Senior Notes(the "5.375% Notes due 2025")
 |   | April 15, 2025 |   | semi-annually on April 15 and October 15 |   | 1,000,000 | 
 |   | 990,572 | 
 |   | 990,340 | 
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| Sirius XM (b)
 |   | May 2016 |   | 5.375% Senior Notes(the "5.375% Notes due 2026")
 |   | July 15, 2026 |   | semi-annually on January 15 and July 15 |   | 1,000,000 | 
 |   | 989,474 | 
 |   | 989,259 | 
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| Sirius XM (b)(c)
 |   | August 2012 |   | 5.25% Senior Secured Notes (the "5.25% Notes") |   | August 15, 2022 |   | semi-annually on February 15 and August 15 |   | 400,000 | 
 |   | 396,376 | 
 |   | 396,232 | 
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| Sirius XM (d)
 |   | December 2012 |   | Senior Secured Revolving Credit Facility (the "Credit Facility")
 |   | June 16, 2020 |   | variable fee paid quarterly |   | 1,750,000 | 
 |   | 530,000 | 
 |   | 390,000 | 
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| Sirius XM |   | Various |   | Capital leases |   | Various |   |  n/a |   |  n/a | 
 |   | 11,473 | 
 |   | 13,559 | 
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| Total Debt |   | 5,994,878 | 
 |   | 5,855,512 | 
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| Less: total current maturities |   | 4,637 | 
 |   | 5,485 | 
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| Less: total deferred financing costs for Notes |   | 7,028 | 
 |   | 7,263 | 
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| Total long-term debt |   | $ | 5,983,213 | 
 |   | $ | 5,842,764 | 
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| (a) | The carrying value of the obligations is net of any remaining unamortized original issue discount. |  
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| (b) | Substantially all of our domestic wholly-owned subsidiaries have guaranteed these notes. |  
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| (c) | 
The liens securing the 5.25% Notes are equal and ratable to the liens granted to secure the Credit Facility.  
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| (d) | 
Sirius XM's obligations under the Credit Facility are guaranteed by certain of its material domestic subsidiaries and are secured by a lien on substantially all of Sirius XM's assets and the assets of its material domestic subsidiaries.  Interest on borrowings is payable on a monthly basis and accrues at a rate based on LIBOR plus an applicable rate.  Sirius XM is also required to pay a variable fee on the average daily unused portion of the Credit Facility which is payable on a quarterly basis.  The variable rate for the unused portion of the Credit Facility was 0.25% per annum as of March 31, 2017.  Sirius XM's outstanding borrowings under the Credit Facility are classified as Long-term debt within our unaudited consolidated balance sheets due to the long-term maturity of this debt.
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