- North Central Telephone Co-Op
- North English Phone Co
- North River Telephone Corp
- North Star Communications
- North Star Communications
- North Star Multi & Comm
- North Star Multi & Comms
- North State Communications
- North State Telephone Co
- Northcentral Telcom
- Northcentral Telcom
- Northcentral Telcom
- Northcentral Telcom
- Northcentral Telcom
- Northcentral Telcom
- Northeast Florida Telephone Co
- Northeast Iowa Telephone Co
- Northeast Louisiana Telephone
- Northeast Nebr Phone Co Repair
- Northeast Nebr Phone Co Repair
- Northeast Nebraska Phone Co
- Northeast Nebraska Phone Co
- Northeast Ohio Telephone
- Northeast Telephone Co
- Northeastern Ohio Telephone
- Northern Arkansas Phone Co Rpr
- Northern Datacom
- Northern Telecom
- Northern Telecom
- Northern Telecom
- Northern Telecom Inc
- Northern Telephone & Data Corp
- Northern Telephone Co-Op Inc
- Northern Telephone Cooperative
- Northern Telephone Svc
- Northern Valley Communications
- Northland Telephone - Maine
- Northland Telephone Co
- Northland Telephone Co-Maine
- Northstar Access
- Northstar Access
- Northstar Access
- Northstar Access
- Northwest Iowa Telephone Co
- Northwest Microwave Inc
- Northwest Microwave Inc
- Northwest Telephone Co-Op Assn
- Northwest Telephone Inc
- Northwest WAN
- Northwestern Bell Teleride
- Northwestern Bell Tower
- Northwestern Bell Tower
- Nova Telephone Co
- Nova-Net
- NOW Communications Inc
- Noxapater Telephone Co
- NRTC
- Nrtc National Rural Telecomm
- NSG Inc
- NSI Network Svc
- Nsight Telservices
- NTC Net
- NTCA
- Ntelos
- Ntelos
- Ntelos
- Ntelos
- Ntelos
- Ntelos
- NTS Action Telcom
- NTS Action Telcom
- NTS Communication Inc
- Nts Communications Inc
- Nts Communications Inc
- Nts Communications Inc
- Nts Communications Inc
- Nts Communications Inc
- Nts Communications Inc
- Ntt America Inc
- Ntt America Inc
- NTTUSA Inc
- Nu Star Communications
- Nu Vox Communications
- Nu Vox Communications
- Nu Vox Communications Inc
- Nu Vox Communications Inc
- Nu Vox Communications Inc
- Nu Vox Communications Inc
- Nu Vox Communications Inc
- Nu Vox Communications Inc
- Nu Vox Inc
- Nu Wave Communication Solution
- Nu-Telecom
- Nu-Telecom
- NUI Solutions Express
- Nunn Telephone Co
- Nunn Telephone Co
- Nustar Communications
- Nutel Systems.Com Inc
- Nuvox
- Nw Data Technology
- Nytel Long Distance Corp
- Nytel Voice & Data Corp
- O C Inc
- O1 Communications
- O1 Communications Inc
- Oak Phone Store
- Oakwood Group
- Oblio Telecom Inc
- Oceanic Communications
- Odin Telephone Exchange Inc
- Off The Hook
- Off The Hook Telecom
- Off The Hook Telecom
- Office Phone
- Ogden Telephone Co
- Ogden Telephone Co Repair Svc
- Ohio Bell Telephone Co
- Oistad Enterprise Inc
- Oklahoma Telephone & Telegraph
- Omega Tele-Com
- Omni Telecommunications Co
- Omnicity
- Omnicom
- Omnitel Communications
- On Command
- On Fiber Communications
- On Track Communication
- Oncomm Communications
- One Call Communications
- One Eighty Communications
- One Net USA
- One Source Communications
- One Touch Payphones Inc
- One Touch Systems
- One Touch Technologies
- One Touch Tone Telephone
- Onecall
- Oneida Communications Inc
- Oneida County Rural Tel Co
- Oneida Telephone Exchange
- Oneida Telephone Exchange
- Onestar Long Distance Inc
- Onetone Telecom
- Onevoice Communications
- Onfiber Communication
- Onsenet America Inc
- Onsite Access
- Onslow Co-Op Telephone Co
- Ontario Telephone Co
- Ooma Inc
- Open LCR Corp
- Open Net Communications
- Openband
- Openpop Dot Com
- Operator Service Co
- Operator Service Co
- Opnix Inc
- Optidial Communications
- Optimal Satcom Inc
- Optimum Metro Sales
- Optimum Online-Cablevision
- Optimum Voice
- Optimum Voice
- Optimum Voice
- Optimum Voice
- Optimum Voice From Cablevision
- Optimum Voice From Cablevision
- Optimum Voice From Cablevision
- Optimum Voice From Cablevision
- Optimum Voice From Cablevision
- Optran Services Inc
- Orbitcom
- Orbitcom
- Oregon Telecom
- Oregon Telecom
- Oregon Telecom
- Oregon Telecom Eschelon
- Oregon Telecom Inc
- Oregon Telecom Inc
- Oregon-Idaho Utilities
- Oregon-Idaho Utilities
- Oregon-Idaho Utilities
- Oretel Communications
- Orion Systems
- Orion Telecommunications
- Orlando Digital Telephone Corp
- Orlando Switch Site
- Orquidia Express
- Orwell Telephone Co
- Oswego Communications
- OTE Communications
- Otelco Inc
- Otelco Telephone Co
- Otelco Telephone Co
- Ottoville Mutual Telephone Co
- Otz Telephone Co-Op Inc
- Ovation Communications Inc
- Overseas Telecommunications
- Owl Telephone
- OWTC
- Oxford Networks
- Oxford Networks
- Ozark Telephone Co
- P B Xperts
- P K Diversified Group
- Pac Tel
- Pac Wwest Telecom
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- Pac-West Telecomm Inc
- PACE Telecommunication
- Pacific Bell Pioneers
- Pacific Coast Communication
- Pacific Communications
- Pacific Inter Tel
- Pacific Light Net
- Pacific Light Net Inc
- Pacific Telassist
- Pacific Telcom Inc
- Pacific Telecom
- Pacific Telecommunications
- Pacific West Wireless
- Packard Tel
- Packet Fusion Inc
- Pacwest Telecomm
- Pae Tec Communications
- Pae Tec Communications Inc
- Paetec
- Paetec Communications
- Paetec Communications
- Paetec Communications Inc
- Paetec Communications Inc
- Paetec Communications Inc
- Paetec Communications Inc
- Paetec Communications Inc
- Paetec Communications Inc
- Paetec Communications Inc
- Paetec Communications Inc
- Pageco Wireless
- Pager & Phone Co
- Pager & Phone Co
- Pager & Phone Co
- Pager & Phone Co
- Pager & Phone Co
- Pager & Phone Co
- Pager & Phone Co
- Pager & Phone Co
- Pager & Phone Co
- Pager & Phone Co
- Pager & Phone Co
- Pager & Phone Co
- Pager & Phone Co
- Pager & Phone Co
- Pager & Phone Co
- Paisley Group
- Palmer Mutual Telephone Co
- Palo Cooperative Phone Assn
- Pamela Catoe
- PANHANDLE Telephone Co-Op Inc
- Panhandle Telephone Inc
- Pannon Telecom Inc
- Panora Co-Op Telephone Assn
- Paragon Services Intl Inc
- Parallogic
- Park Region Telephone Co
- Parkervision
- Parson Enterprise
- Parsons Telecom
- Parsons Telecom
- Partner Communications
- Partner Communications Co-Op
- Partner Telecom Inc
- Pat W Murie
- Pathwayz Communications Inc
- Pathwayz Communications Inc
- Pathwayz Communications Inc
- Patriot Communication LLC
- Pattersonville Telephone Co
- Paul Edward Alsup
