Fort Mill Telephone Company
d/b/a Comporium Communications
Part of the Comporium Communications group. 4 OCNs across 2 states · 93 blocks combined.
Holding: Comporium Inc
330 E Black St
Rock Hill, SC 29730-5377
comporium.com
2004-02-20
2015-12-10
About Comporium Communications
Comporium Communications is an independent local exchange carrier (ILEC) providing telephone, broadband internet, cable TV, and home security services primarily to residential and business customers in rural and suburban areas of South Carolina and parts of North Carolina. It operates in a service area covering over 4,500 square miles across multiple counties, with additional business communications offerings in Charlotte and Spartanburg, SC. Ranked as the 13th largest US telecommunications provider, it maintains a regional focus with some investments in connected home technologies.
- Parent: Comporium Inc.
- Founded: 1891
- Headquarters: Rock Hill, SC
- Services: ILEC voice, broadband internet, cable TV, home security, business communications
Sources: About Comporium Communications - Celebrating 125 Years! · Comporium - Wikipedia · Comporium Careers, Perks + Culture - Built In
Numbers by age tier
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Carrier website
comporium.com: opens in a new tab
HQ: Rock Hill, SC
Block portfolio at a glance
By age
- Recent (0). Last 18 mo
- Medium (0)
- Old (12)
- Undated (4)
Footprint by state
Stronger blue = more blocks issued in that state. ● marks states with activity in the last 18 months.
- South Carolina SC · 16
Top area codes
Bars show total blocks; red overlay is recent.
Block assignments by year
Sister OCNs in the Comporium Communications group
Same customer-facing carrier, different state-registered OCN. Combined stats are on the Comporium Communications group page.
| OCN | Company name on file | HQ state | Total | Recent |
|---|---|---|---|---|
| 0542 | Comporium Inc | SC | 53 | · |
| 0531 | Lancaster Telephone Company | SC | 22 | · |
| 749H | Comporium Inc - NC | SC | 2 | · |
Sister OCNs under Comporium Inc
| OCN | Company | Total | Recent |
|---|---|---|---|
| 9412 | Springboard Telecom LLC - NC | 26 | 0 |
| 0531 | Lancaster Telephone Company | 22 | 0 |
| 0473 | Citizens Telephone Company | 6 | 0 |
| 4649 | Springboard Telecom LLC | 0 | 0 |
| 9288 | Springboard Telecom LLC - NC | 0 | 0 |