| Company | Now Known As | Street Address | Customer Contact No. |
|---|---|---|---|
| Backbone Communications, Inc. | 510 W 6th Street Suite 930 Los Angeles, CA 90014 | 213-489-2156 | |
| Baltimore-Washington Telephone Company | 200 Continental Drive Suite 401 Newark, DE 19713 | 949-942-6500 | |
| Bandwidth.com CLEC, LLC | 2230 Bandmate Way Raleigh, NC 27607 | 855-513-9666 | |
| Barr Tell USA, Inc. | 218 East Park Ave. Suite 522 Long Beach, NY 11561 | 212-226-4420 | |
| BCE Nexxia Corporation | 1821 Walden Office Squire Suit 400 Schaumburg, IL 60173 | 855-848-7155 | |
| BCM One, Inc. | 295 Madison Avenue 5th Floor New York, NY 10017 | 888-543-2000 | |
| BCN Telecom, Inc. | 1200 Mount Kemble Avenue 3rd Floor Morristown, NJ 07960 | 866-462-9259 | |
| Berkshire Cable Corporation d/b/a Consolidated Communications Long Distance | 2116 S. 17th Street Mattoon, IL 61938 | 844-968-7224 | |
| Berkshire Telephone Corporation d/b/a Consolidated Communications | 2116 S. 17th Street Mattoon, IL 61938 | 844-968-7224 | |
| BIF IV Intrepid OpCo LLC | 11001 W 120th Avenue Suite 305 Broomfield, CO 80021 | 866-371-1860 | |
| Billing Services of America, Inc. | 10161 Park Run Drive Suite 231 Las Vegas, NV 89145 | 952-401-0681 | |
| Blink Communications Corp | 70 Charles Lindbergh Boulevard Unit# 1 Uniondale, NY 11553 | 877-891-2332 | |
| Block Line Systems, LLC | 2700 Oregon Road Northwood, OH 43619 | 888-808-6111 | |
| BlueBird Communications LLC | 447 Broadway 2nd Floor, #155 New York, NY 10013 | 469-513-0000 | |
| Boldyn Networks Fiber US LLC | 1400 Broadway New York, NY 10018 | 212-931-9020 | |
| Boldyn Networks Infrastructure US LLC | 1400 Broadway New York, NY 10018 | 212-931-9020 | |
| Boldyn Networks US LLC | 121 Innovation Drive Suite 200 Irvine, CA 92617-3094 | 949-515-1500 | |
| BRIGHT PACKET, INC. | 11756 Artesia Blvd. Suite A Artesia, CA 90701 | 866-375-6032 | |
| Broadband Dynamics, L.L.C. | 8757 E. Via de Commercio First Flood Scottsdale, AZ 85258 | 800-277-1580 | |
| Broadview Networks, Inc. | 4005 North Rodney Parham Road Little Rock, AR 72212 | 855-352-2731 | |
| Broadvox-CLEC, LLC | One North Wacker Suite 2500 Chicago, IL 60606 | 773-693-2637 | |
| Broadwing Communications, LLC. | 100 CenturyLink Drive Monroe, LA 71203 | 877-453-8353 | |
| BT Communications Sales LLC | 11440 Commerce Park Drive Suite 100 Reston, VA 20191 | 833-556-6406 | |
| Buehner-Fry Inc. dba Resort Operator Services | 543 NW York Drive Suite 120 Bend, OR 97703 | 800-777-9511 | |
| Buehner-Fry, Inc. dba Directdial USA | 543 NW York Drive Suite 120 Bend, OR 97703 | 800-777-9511 | |
| BullsEye Telecom, Inc. | Lingo Telecom, LLC d/b/a Lingo | 25925 Telegraph Road Suite 210 Southfield, MI 48033 | 877-638-2855 |
| Business Telecom, LLC | 4005 North Rodney Parham Road Little Rock, AR 72212 | 855-352-2731 | |