- Judy L Renfroe
- Julie Phone Svc
- Juliette Telephone & Data Co
- Jus-Com
- Just Jacks Co Inc
- K C Telecom Svc
- K P Voice & Data
- K P Voice & Data
- K P Voice & Data
- K P Voice & Data
- K R Brokerage
- K S Telcom
- K2 Communications
- Kaiser Communications
- Kalama Telephone Co
- Kalama Telephone Co
- Kale's Answering Svc
- Kalida Telephone Co
- Kamine Industries
- Kanoma Telecom Svc
- Kaplan Telephone Co
- Kddi America Inc Pacific
- KDL Warehouse
- Keep In Touch Communications
- Kellee Communications Group
- Kelly & Wilmore Co Inc
- Kelly's Satellites
- Kenneth C Leber Inc
- Kenneth L Scarboro
- Kennon Worldwide Inc
- Kennon Worldwide Inc
- Ker Tel Communications
- Ker Tel Communications Inc
- Kerman Telephone Co
- Kerrville Telephone Bus Ofc
- Kerrville Telephone Bus Ofc
- Kerrville Telephone Cellular
- Keyart Comm Inc
- Keycom Telephone Systems Inc
- Keystone Farmers Cooperative
- Kids Phone
- Kids Phone
- King Phone Systems
- KINGDOM Telephone Co
- Kingsford Employees Phone
- Kinsman Telephone Co
- Kinsman Telephone Co
- Kinsman Telephone Co
- Kit-KAT International Telephon
- KMC Telcom
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- KMC Telecom
- KMC Telecom
- KMC Telecom
- KMC Telecom Holdings Inc
- KMC Telecom Holdings Inc
- Kmc Telecom Holdings Inc
- KMC Telecom I
- KMC Telecom Inc
- KMC Telecom Inc
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- KMC Telecom Inc
- KMC Telecom Of Virginia
- KMC Telecom Of Virginia Inc
- KMC Telecom/Dayton
- KMCI
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- Kmtelcom
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- Knology
- Knology
- Kochs Telecommunication Svc
- Koreantel Inc
- Kouso Communications
- KRT Global Inc
- KRT Global Inc
- KS Telecom
- KS Telecom
- Kusner Communications
- L & D Communications Inc
- L A Telecom Co
- L S Technologies LLC
- LA Harpe Communications Inc
- LA Harpe Telephone Co
- LA Jicarita Rural Telephone
- LA Motte Telephone Co Inc
- LA Telco Long Distance
- LA Valle Long Distance
- Lackey Jeanie Teleph
- Lafourche Telephone Co Inc
- Lake Livingston Telephone Co
- Lake Mary Telephone Co
- Lake Michigan Telephone
- Lakedale Telephone Co
- Lakefield Communications
- Lakeland Telecom
- Lakeside Telephone Co
- Lakewood Telephone
- Lamping
- Lancaster Telephone Co
- Landmark Center
- LARAZA.COM
- LARAZA.COM
- Larry Disher
- Larry G Bishop
- Las Vegas Telephone
- Latin American Nautilus
- Latin American Nautilus
- Latinamerica Telephone Corp
- Laurel Telephone Co
- Lawndale Telephone & Car
- Lawndale Telephone & Car
- Layer 3 Communications
- Layer One Inc
- LCI Intl
- Lct
- LDDS Metromedia
- LDDS World Com
- LDDS-Metromedia
- LDMI Telecommunications Inc
- Ldmi Telecommunications Inc
- LDMI Telecommunications Inc
- Ldmi Telecommunications Inc
- LDMI Telecommunications Inc
- LDS Communications
- LDT Netcom Inc
- Le-Ru Long Distance Co
- LEACO
- LEACO
- Leaco Rural Telephone Coop Inc
- Leaf River Telephone Co
- Lecstar Telecom Inc
- Lee County Phone Book
- Lemonweir Valley Telephone Co
- Lennon Telephone Co
- Leonard Communications
- Leonard Communications Inc
- Leonore Telephone Co
- Lercher Enterprises
- Level 3 Communications
- Level 3 Communications
- Level 3 Communications
- Level 3 Communications
- Level 3 Communications
- Level 3 Communications
- Level 3 Communications
- Level 3 Communications
- Level 3 Communications
- Level 3 Communications Inc
- Lexcom Telecommunications
- Li Tel Telecommunications
- Liberty Cellular Network
- Liberty Cellular Network
- Liberty Communications
- Liberty Communications
- Liberty Communications Inc
- Liberty Connection Inc
- Liberty Phone Co
- Liberty Phones Inc
- Liberty Telecom Inc
- Liberty Telephone Inc
- Lightpath
- Lightship Telecom
- Lightship Telecom
- Lightship Telecom
- Lightship Telecom LLC
- Ligonier Telephone Co
- Ligonier Telephone Co Inc
- Ligonier Telephone Repair
- Lily Davenport
- Lincoln Co
- Lincoln Telephone Co
- Lincoln Telephone Co
- Linda Gillispie
- Lines Of Communication
- Link Communications Group
- Link Communications Group
- Linkair Communications
- Linkatel Communications Inc
- Linktel Communication
- Linmor Technologies
- Linq Telecom Inc
- Linq Telecom Inc
- Linx
- Linx
- Litel Telecommunications
- Little Star Ctr
- Live Circuit LLC
- Live Wire Net
- Livingston Telephone Co
- LMC Products
- Lobby Phone
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- Local Nsight
- Local Phone Co
- Local Phone Co
- Local Phone Co
- Local Phone Co
- Local Phone Svc
- Local Tel Communications
- Local Telephone Svc
- Local Telephone Svc Co Inc
- Local Telephone Svc Co Inc
- Lockhart Telephone Co
- Locus Telecommunications Inc
- Logan Telephone Cooperative
- Logix
- Logix Communications
- Logix Communications
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- Lone Rock Co-Op Phone Co
- Lone Star Communications
- Long Distance
- Long Distance Telephone Svc
- Long Island Telephone Co
- Long Island Telephone Co Inc
- Long Lines
- Looking Glass Networks Inc
- Looking Glass Networks Inc
- Lorain Telephone Co
- Loretel Systems
- Los Phone Guy's
- Lost Nation Elwood Tele Co
- Lotion Galore
- Louis Xiv LLC
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- Lowry Telephone Co
- Lowry Telephone Co
- Lowry Telephone Co
- LTDS Corp
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- Lucent Technologies
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- Luschen Martin
- Lynn Badorek
- Lynnville Telephone Co
- M & C Communications
- M 3 Telecom
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- M C I Products Group
- M Ci Local Access
- M H Biggerstaff
- M Payphone
- M Phase Corp
- M Power Communications
- M S Communications
- M Tel
- M's Teleph
- Macoliz Inc
- Madison River Communications
- Madison Station Gate Phone
- Madison Telephone Co
- Madison Telephone Co
- Madison Telephone Co
- Magellan Telecommunications
- Magic Link
- Magnolia Pool Telephone
- Main St Communications
- Major League Phone Card
- Make-N-Connections
- Manawa Telephone Co
- Manawa Telephone Co Inc
- Manly Co
- Mantech Telecommunications
- Mantech Telecommunications
- Manti Telephone
- Manti Telephone Co
- Mapleton Communications
- Mar-Comm Inc
- Marconi Communications
- Marcus Evans Inc
- Marietta Fibernet
- Mark Gresl
- Mark Gresl
- Mark Twain Communication Co
- Marne & Elk Horn Telephone Co
- Martin Telecommunications
- Martin Telephone
- Maryland Business Phone Co
- Maryland Public Payphones
- Maryland Telephone
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