18 Leading Telephone Companies In California, USA — 2026

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Telephone Companies
Vonage
28914 Roadside Dr #141 Agoura, CA 91301 · California
(866) 967-6961 Map
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Telephone Companies
Vonage
28914 Roadside Dr #141 Agoura, CA 91301 · California
(866) 967-6961 Map
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Telephone Companies
AT&T
14915 Olympic Dr Clearlake, CA 95422 · California
(707) 993-4876 Map
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Telephone Companies
Colombia Communications
22480 Parrotts Ferry Rd Columbia, CA 95310 · California
(209) 296-3322 Map
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Telephone Companies
Colombia Communications
22480 Parrotts Ferry Rd Columbia, CA 95310 · California
(209) 296-3322 Map
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Telephone Companies
American Tower System
2072 Broadstone Pkwy Folsom, CA 95630 · California
(916) 941-1612 Map
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Telephone Companies
AMDEV Communications Corp
20975 Woodside Way Groveland, CA 95321 · California
(209) 962-5900 Map
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Telephone Companies
3i Networks Inc
15375 Barranca Pkwy Irvine, CA 92618 · California
(949) 417-2520 Map
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Telephone Companies
AAT Communications
16700 Aston Irvine, CA 92606 · California
(949) 417-0168 Map
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Telephone Companies
Ducor Telephone Co Repair Line
98890 Kennedy Meadows Rd Inyokern, CA 93527 · California
(559) 850-2211 Map
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Telephone Companies
3i Networks Inc
15375 Barranca Pkwy Irvine, CA 92618 · California
(949) 417-2520 Map
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Telephone Companies
Aaanetsolution Inc
1400 Reynolds Ave # B201 Irvine, CA 92614 · California
(866) 222-4959 Map
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Telephone Companies
AAT Communications
16700 Aston Irvine, CA 92606 · California
(949) 417-0168 Map
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Telephone Companies
Xgen Communications
19656 Fall Creek Dr Lakehead, CA 96051 · California
(530) 238-9702 Map
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Telephone Companies
Xgen Communications
19656 Fall Creek Dr Lakehead, CA 96051 · California
(530) 238-9702 Map
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Telephone Companies
CCI Telecommunications
3565 Taylor Rd Loomis, CA 95650 · California
(916) 652-6305 Map
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Telephone Companies
CCI Telecommunications
3565 Taylor Rd Loomis, CA 95650 · California
(916) 652-6305 Map
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Telephone Companies
CCI Telecommunications
3565 Taylor Rd Loomis, CA 95650 · California
(916) 652-6305 Map
telephone companies in Other Cities
Irvine 5 Arlington 4 Blountsville 4 Ketchikan 4 Surprise 4 Sterrett 3 Loomis 3 Adamsville 2 Altoona 2 Attalla 2

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