| Company | Status | Now Known As | Street Address | Customer Contact No. | |
|---|---|---|---|---|---|
| O1 Communications East, LLC | Ceased Operations | 5190 Golden Foothill Pkwy El Dorado Hills, CA 95762 | |||
| O1 Communications of New York, LLC | Ceased Operations | 5190 Golden Foothill Parkway El Dorado Hills, CA 95762 | |||
| Oak Grove Holdings Corp. | Ceased Operations |
1688 Meridian Avenue, Suite 509
P.O.Box 191560 Miami Beach, FL 33119-1560 | |||
| Oakstone, Inc.* | Ceased Operations | America One Communications; Inc. | |||
| Ocampo Tevecom, Inc. | Ceased Operations | ||||
| oCen Communications, Inc. | Ceased Operations | ||||
| Ocius Communications, Inc. | Ceased Operations | ||||
| OCMC, Inc.* | Ceased Operations | One Call Communications; Inc.; OPTICOM; 1-800-MAX-SAVE; AdvantTel | 801 Congressional Boulevard Carmel, Indiana 46032 | ||
| OCOM Corporation | Ceased Operations | ||||
| OCOM New York, Inc. | Ceased Operations | ||||
| Office Services of New York, Inc. | Ceased Operations | Atlantic and Pacific Telecommunications | |||
| Ogden Communications, Inc. | Ceased Operations | ||||
| Ogden Telephone Company | Ceased Operations | ||||
| Ogden Telephone Company d/b/a Frontier Ogden Telephone Company | Active | 1919 McKinney Ave. Dallas, TX 75201 | 800-921-8101 | ||
| OLS, Inc. | Ceased Operations | 1455 Alderman Dr. Alpharetta, GA 30005 | |||
| Olympia Deli* | Ceased Operations | ||||
| Olympia Telcom Group | Ceased Operations | ||||
| Omni Communications, Inc. | Ceased Operations | ||||
| OmniCall, Inc. | Ceased Operations | ||||
| Omniplex Communications Group, LLC | Ceased Operations | ||||
| Omnitron Communications, Inc. | Ceased Operations | ||||
| ONCOR Communications, Inc. | Ceased Operations | ||||
| One-Stop Communications, Inc. | Ceased Operations | ||||
| One-to-One Communications d/b/a One-2-One Communications | Ceased Operations | ||||
| One Call Communications, Inc. d/b/a Opticom | Ceased Operations | ||||
| One Source Networks CLEC LLC | Ceased Operations | 1870 W Bitters Road San Antonio, TX 78248 | |||
| One Step Billing, Inc. | Ceased Operations | ||||
| One Stop Telecom of NY LLC | Ceased Operations | 4 Fair Meadow Drive Brewster, NY 10509 | |||
| One Tel Communications, Inc. | Ceased Operations | ||||
| One Tel Inc. | Ceased Operations | ||||
| One Voice Communications, Inc. | Active | 19775 Belmont Executive Plaza Suite 410 Ashburn, VA 20147 | 877-363-3133 | ||
| Oneida County Rural Telephone Company | Active | 9560 Main Street Holland Patent, NY 13354 | 315-865-5201 | ||
| Oneida County Telephone Long Distance, Inc. | Active | 9560 Main Street Holland Patent, NY 13354 | 315-865-5201 | ||
| OneLink Communications, Inc. | Ceased Operations | 8400 N University Dr Ste 204 Tamarac, FL 33321 | |||
| OneSource Building Technologhies, Inc. | Ceased Operations | ||||
| OneStar Long Distance, Inc.* | Ceased Operations | ||||
| OnFiber Carrier Services, Inc. | Ceased Operations | ||||
| Online Communications, Inc. | Ceased Operations | ||||
| Online Savings, Inc. | Active | 10161 Park Run Drive Suite 231 Las Vegas, NV 89145 | 612-867-2415 | ||
| Online Telecommunications, Inc. | Ceased Operations | ||||
| OnNet Communications LLC ("OnNet") | Ceased Operations | ||||
| Onsite Access LLC.* | Ceased Operations | ||||
| Onsite Access Local LLC* | Ceased Operations | ||||
| Ontario Telephone Company, Inc. | Active | 75 Main Street Phelps Phelps, NY 14532 | 866-353-7209 | ||
| OnTheNetAllTheTime | Ceased Operations | ||||
| Onvoy, Inc. d/b/a Onvoy Voice Services | Ceased Operations | 10300 6th Ave North Plymouth, MN 55441 | |||
| Onvoy, LLC | Active | One North Wacker Drive Suite 2500 Chicago, IL 60606 | 312-384-8000 | ||
| ONYX TELCOM, INC. | Ceased Operations | ||||
| Open Access Acquisition LLC | Ceased Operations | Lightower Fiber Networks | 80 Central Street Boxborough, Massachusetts 01719 | ||
| Open Network Global Services, L.C. | Ceased Operations | ||||
| OpenTel Communications, Inc. | Ceased Operations | ||||
| Operator Communications, Inc. | Ceased Operations | Oncor Communications; Inc. (OCI) | |||
| Operator Services Company | Ceased Operations | Operator Services Company, LLC | 5302 Avenue Q Lubbock, TX 79412 | ||
| Operator Services Company, LLC | Ceased Operations | kgb USA 6010 Exchange Parkway NA San Antonio, TX 78238 | |||
| Opex Communications, Inc. | Ceased Operations | TCI Long Distance | 707 Wilshire Blvd. 12th Floor Los Angeles, CA 90017 | ||
| OPEX Communications, Inc. d/b/a TCI Long Distance | Ceased Operations | 3777 Long Beach Blvd. Suite 400 Long Beach, CA 90807 | |||
| OPITMUM GLOBAL COMMUNICATIONS, INC | Ceased Operations | 450 MAIN STREET SPRINGFIELD, MA 01105 | |||
| Optex, Inc. | Ceased Operations | ||||
| Optic Internet Protocol, Inc. | Ceased Operations | 3050 Royal Blvd South, Suite 165 Alpharetta, GA 30022 | |||
| Optical Communications Group Inc. | Active | 7924 71 Ave Glendale, NY 11385 | 718-326-4340 | ||
| Optical Telephone Corporation | Ceased Operations | ||||
| Opticom | Ceased Operations | ||||
| Opticom Corporation | Ceased Operations | ||||
| Option One Communications New York, Inc. | Ceased Operations | ||||
| Options Technology Limited | Ceased Operations | ||||
| OPUS Telecom, Inc. | Ceased Operations | ||||
| Oquaga Lake Cable system Inc. | Ceased Operations | 396 Oquaga lake road Deposit, NY 13754 | |||
| Orange County-Poughkeepsie MSA limited partnership | Ceased Operations | ||||
| Orange Internet Services | Ceased Operations | ||||
| Orca Telecom, Inc. | Ceased Operations | ||||
| Orion Telecommunications Corporation | Ceased Operations | ||||
| Oriskany Falls Telephone Corporation | Ceased Operations | Vernon Telephone Company, Inc. | TDS Telecom 525 Junction Rd Madison, Wi 53717 | ||
| Osborne Telecommunications Corporation | Ceased Operations | ||||
| Outside Connection, Inc. | Ceased Operations | 2ll N. Grove Street Berlin, NJ 08009 | |||
| Overlook Communications International Corp. | Ceased Operations | ||||
| Ozark Telecom, Inc. | Ceased Operations | ||||