EXHIBIT 32.2

CERTIFICATION OF CHIEF EXECUTIVE OFFICER
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Zayo Group, LLC (the “Company”) on Form 10-K for the fiscal year ended June 30, 2011 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Ken desGarennes, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. ss. 1350, as adopted pursuant to ss. 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: September 9, 2011	By:	/s/ Ken desGarennes
		Ken desGarennes
		Chief Financial Officer