Attached files

file filename
10-K - 10-K - Level 3 Parent, LLCa2196706z10-k.htm
EX-12 - EX-12 - Level 3 Parent, LLCa2196706zex-12.htm
EX-23 - EX-23 - Level 3 Parent, LLCa2196706zex-23.htm
EX-31.2 - EX-31.2 - Level 3 Parent, LLCa2196706zex-31_2.htm
EX-32.2 - EX-32.2 - Level 3 Parent, LLCa2196706zex-32_2.htm
EX-32.1 - EX-32.1 - Level 3 Parent, LLCa2196706zex-32_1.htm
EX-31.1 - EX-31.1 - Level 3 Parent, LLCa2196706zex-31_1.htm

QuickLinks -- Click here to rapidly navigate through this document


Exhibit 21

Significant Subsidiaries As of and for the Fiscal Year ending December 31, 2009

Level 3 Communications, Inc.
  Level 3 Financing, Inc.
    Level 3 Communications, LLC
      Broadwing, LLC
        Broadwing Communications, LLC
      TelCove Operations, LLC
      WilTel Communications, LLC
    BTE Equipment, LLC
    Level 3 International, Inc.
      Level 3 Holdings, B.V.
        Level 3 Communications Limited (UK)
        Level 3 Communications GmbH (Germany)
    Level 3 Holdings, Inc.
      KCP, Inc.



QuickLinks