EXHIBIT 99.3 NEXTLINK COMMUNICATIONS, L.L.C. NEXTLINK CAPITAL, INC. OFFER TO EXCHANGE $350,000,000 IN PRINCIPAL AMOUNT OF 12 1/2% SENIOR NOTES DUE APRIL 15, 2006 IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED FOR $350,000,000 IN PRINCIPAL AMOUNT OF 12 1/2% SENIOR NOTES DUE APRIL 15, 2006 To Our Clients: Enclosed for your consideration is a Prospectus dated , 1996 (as the same may be amended or supplemented from time to time, the "Prospectus") and a form of Letter of Transmittal (the "Letter of Transmittal") relating to the offer (the "Exchange Offer") by NEXTLINK Communications, L.L.C. (the "Company") and NEXTLINK Capital, Inc. (together with the Company, the "Issuers") to exchange up to $350,000,000 in principal amount of their 12 1/2% Senior Notes due April 15, 2006 in reliance upon an exemption from registration under the Securities Act of 1933, as amended (the "Senior Notes"), for $350,000,000 in principal amount of their 12 1/2% Senior Notes due April 15, 2006 (the "Exchange Notes"). The material is being forwarded to you as the beneficial owner of Senior Notes carried by us for your account or benefit but not registered in your name. A tender of any Senior Notes may be made only by us as the registered holder and pursuant to your instructions. Therefore, the Issuers urge beneficial owners of Senior Notes registered in the name of a broker, dealer, commercial bank, trust company or other nominee to contact such registered holder promptly if they wish to tender Senior Notes in the Exchange Offer. Accordingly, we request instructions as to whether you wish us to tender any or all Senior Notes, pursuant to the terms and conditions set forth in the Prospectus and Letter of Transmittal. We urge you to read carefully the Prospectus and Letter of Transmittal before instructing us to tender your Senior Notes. YOUR INSTRUCTIONS TO US SHOULD BE FORWARDED AS PROMPTLY AS POSSIBLE IN ORDER TO PERMIT US TO TENDER SENIOR NOTES ON YOUR BEHALF IN ACCORDANCE WITH THE PROVISIONS OF THE EXCHANGE OFFER. The Exchange Offer will expire at 5:00 p.m., Eastern Standard Time, on , 1996, unless extended (the "Expiration Date"). Senior Notes tendered pursuant to the Exchange Offer may be withdrawn, subject to the procedures described in the Prospectus, at any time prior to the Expiration Date. If you wish to have us tender any or all of your Senior Notes held by us for your account or benefit, please so instruct us by completing, executing and returning to us the instruction form that appears below. The accompanying Letter of Transmittal is furnished to you for informational purposes only and may not be used by you to tender Senior Notes held by us and registered in our name for your account or benefit. INSTRUCTIONS The undersigned acknowledge(s) receipt of your letter and the enclosed material referred to therein relating to the Exchange Offer of NEXTLINK Communications, L.L.C. and NEXTLINK Capital, Inc. THIS WILL INSTRUCT YOU TO TENDER THE PRINCIPAL AMOUNT OF SENIOR NOTES INDICATED BELOW HELD BY YOU FOR THE ACCOUNT OR BENEFIT OF THE UNDERSIGNED AND TO DELIVER THE UNDERSIGNED'S CONSENT WITH RESPECT TO SUCH SENIOR NOTES, PURSUANT TO THE TERMS OF AND CONDITIONS SET FORTH IN THE PROSPECTUS AND THE LETTER OF TRANSMITTAL. Box 1 [_]Please tender my Senior Notes held by you for my account or benefit and deliver my Consent with respect to such Senior Notes. I have identified on a signed schedule attached hereto the principal amount of Senior Notes to be tendered, in integral multiples of $1,000, if I wish to tender less than all of my Senior Notes. Box 2 [_]Please do not tender any Senior Notes held by you for my account or benefit and do not deliver my Consent. Date: , 1996 _____________________________________ _____________________________________ Signature(s) _____________________________________ _____________________________________ Please print name(s) here - -------- Unless a specific contrary instruction is given in a signed Schedule attached hereto, your signature(s) hereon shall constitute an instruction to us to tender all your Senior Notes and to deliver your Consent with respect thereto.