EXHIBIT 23.01 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in Registration Statements Nos. 333-24473 and 333-29353 of West Corporation and subsidiaries on Form S-8 of our reports dated February 6, 2002, appearing in the Annual Report on Form 10-K of West Corporation and subsidiaries for the year ended December 31, 2001. /s/ DELOITTE & TOUCHE LLP Deloitte & Touche LLP Omaha, Nebraska March 15, 2002