Exhibit 23.1


   
                  Consent of Ernst & Young LLP, Independent Auditors


          We consent to the reference to our firm under the caption
          "Experts" and to the use of our report dated February 13, 1998
          with respect to the consolidated financial statements of NETCOM
          On-Line Communications Services, Inc., in Amendment No. 3 to the
          Registration Statement (Form S-4 No. 333-51037) and related
          Prospectus of ICG Services, Inc., dated July 16, 1998.



                                                  /s/ Ernst & Young LLP

                                                  Ernst & Young LLP
          San Jose, California
          July 13, 1998