The Ohio Bell AT&T Tariff P.U.C.O. NO. 20 Telephone Company Part 1 Section 1 PART 1 - Preface 6th Revised Sheet 1 SECTION 1 - Title Sheet and Symbols Cancels 5th Revised Sheet 1 P.U.C.O. No. 20 AT&T Tariff of THE OHIO BELL TELEPHONE COMPANY Cancels Exchange and Network Services Tariff P.U.C.O. No. 1 Message Toll Telephone Service Tariff P.U.C.O. No. 7 Private Line Service Tariff P.U.C.O. No. 2 Pole and Anchor Attachment and Conduit and Trench Occupancy P.U.C.O. No. 1 Customer Premises Equipment Tariff P.U.C.O. No. 1 Access Service Tariff P.U.C.O. No. 1 Effective as of varying dates The Ohio Bell Telephone Company offers services under this Tariff. AT&T Ohio is a registered trade (C) name of The Ohio Bell Telephone Company. Services offered pursuant to this Tariff may be offered under those registered trade names or under the brand name AT&T. All regulated and tariffed services offered by The Ohio Bell Telephone Company, whether under that name, the trade name AT&T Ohio, or under the brand name AT&T, are subject to the terms and conditions of this Tariff. (The Ohio Bell Telephone Company is also referred to herein as “the Company” or “Company”). Trademarks and Service Marks Telcordia® and Common Language® are registered trademarks and iconectiv, CLCI, CLEI, CLFI, CLLI, USOC, FID, NC, NCI and NC/NCI, are trademarks of Telcordia Technologies, Inc. The Common Language codes identified herein are the proprietary information of Telcordia Technologies, Inc. d/b/a iconectiv ("iconectiv") and are licensed to AT&T Services, Inc. The Common Language codes provided herein, if applicable, are solely for the purpose of this Tariff and may not be reproduced, stored or used for any other purpose without the express, written consent of iconectiv. Issued: February 26, 2021 Effective: February 28, 2021 In accordance with the Public Utilities Commission of Ohio, Case No. 10-1010-TP-ORD, dated October 27, 2010. By Brad McLean, President, Columbus, Ohio ATT TN OT-21-0005 THE OHIO BELL P.U.C.O. NO. 20 TELEPHONE COMPANY Ameritech PART 1 SECTION 1 Tariff PART 1 - Preface SECTION 1 - Title Sheet and Symbols Original Sheet No. 2 1. SYMBOLS USED IN THIS TARIFF (C) -- to signify changed regulation (D) -- “ “ discontinued rate or regulation (I) -- “ “ increase (N) -- “ “ new rate or regulation (R) -- “ “ reduction (T) -- “ “ a change in text but no change in rate or regulation Material formerly appeared in Exchange and Network Services Tariff, Section 1, 1st Revised Sheet No. 11, Message Toll Telephone Service Tariff, Preface, 1st Revised Sheet No. 4, Private Line Service Tariff, 2nd Revised Sheet No. 1, Pole and Anchor Attachment and Conduit and Trench Occupancy, Preface, Original Sheet No. 3, and Customer Premises Equipment Tariff, Preface, 1st Revised Sheet No. 4 Issued: October 2, 1995 Effective: October 2, 1995 In accordance with Case No. 95-815-TP-ATA, issued September 1, 1995. By J. F. Woods, President, Cleveland, Ohio .