LETTER OF TRANSMITTAL METROMEDIA FIBER NETWORK, INC. OFFER TO EXCHANGE $650,000,000 OF ITS 10% SERIES B SENIOR NOTES DUE 2008 (THE "EXCHANGE NOTES") WHICH HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, FOR $650,000,000 OF ITS OUTSTANDING 10% SERIES A SENIOR NOTES DUE 2008 (THE "INITIAL NOTES") PURSUANT TO THE PROSPECTUS, DATED , 1999 - -------------------------------------------------------------------------------- THE EXCHANGE OFFER WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME, ON , 1999 OR SUCH LATER DATE AND TIME TO WHICH THE EXCHANGE OFFER MAY BE EXTENDED (THE "EXPIRATION DATE"). - -------------------------------------------------------------------------------- THE EXCHANGE AGENT FOR THE EXCHANGE OFFER IS IBJ WHITEHALL BANK & TRUST COMPANY BY REGISTERED OR CERTIFIED MAIL: IBJ Whitehall Bank & Trust Company P.O. Box 84 Bowling Green Station New York, NY 10274-004 BY HAND OR OVERNIGHT DELIVERY: IBJ Whitehall Bank & Trust Company One State Street New York, NY 10004 BY FACSIMILE FOR ELIGIBLE INSTITUTIONS: (212) 858-2952 Via Telex No: 177754 FOR CONFIRMATION AND/OR INFORMATION CALL: (212) 858-2176 DELIVERY OF THIS LETTER OF TRANSMITTAL TO AN ADDRESS OTHER THAN AS SET FORTH ABOVE OR TRANSMISSION OF INSTRUCTIONS VIA FACSIMILE OTHER THAN AS SET FORTH ABOVE DOES NOT CONSTITUTE A VALID DELIVERY. PLEASE READ THIS ENTIRE LETTER OF TRANSMITTAL CAREFULLY BEFORE COMPLETING ANY BOX BELOW -------------------------- List below the Initial Notes to which this Letter of Transmittal relates. If the space provided below is inadequate, the certificate numbers and principal amount of Initial Notes should be listed on a separate signed schedule affixed hereto. - --------------------------------------------------------------------------------------------------------------- DESCRIPTION OF INITIAL NOTES (1) (2) (3) - --------------------------------------------------------------------------------------------------------------- PRINCIPAL AMOUNT OF INITIAL NOTES PRINCIPAL TENDERED NAME(S) AND ADDRESS(ES) OF REGISTERED HOLDER(S) CERTIFICATE AMOUNT OF (IF LESS THAN (PLEASE FILL IN, IF BLANK) NUMBER(S)* INITIAL NOTES ALL)** - --------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------- ------------------------------------------------------------- ------------------------------------------------------------- - --------------------------------------------------------------------------------------------------------------- * Need not be completed by book-entry holders. ** Unless otherwise indicated, the holder will be deemed to have tendered the full aggregate principal amount represented by such Initial Notes. - --------------------------------------------------------------------------------