Southeastern Indiana Rural Telephone Cooperative Inc
d/b/a SEI Rural Telephone Cooperative Inc
Part of the Southeastern Indiana Rural Telephone Cooperative Inc group. 2 OCNs across 1 states · 38 blocks combined.
Holding: SEI Rural Telephone Cooperative Inc
14005 US Highway 50,
Dillsboro, IN 47018-9645
seidata.com
About SEI Rural Telephone Cooperative
SEI Communications, operating as a member-owned telephone cooperative since 1953, provides local exchange telephone service as an ILEC in portions of Dearborn, Jefferson, Jennings, Ohio, Ripley, and Switzerland counties in southeastern Indiana. It serves rural residential and small business customers with voice, DSL, fiber (up to 1 Gbps), and fixed wireless internet, supplemented by CLEC operations elsewhere in Indiana. As a small rural telco, it partners with Southeastern Indiana REMC on the SEI Fiber network for broadband expansion.
- Founded: 1953
- Headquarters: Dillsboro, IN
- Services: rural ILEC, rural CLEC, fiber broadband, DSL, fixed wireless
Sources: SEI Communications, Inc · About Us | SEI Communications, Inc · Sei Communications - Overview, News & Similar companies
Toll-free side: SEI Rural Telephone Cooperative also operates as a toll-free RespOrg (code CJI01). View on resporgs.com →
Numbers by age tier
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Carrier website
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HQ: Dillsboro, IN

Block portfolio at a glance
By age
- Recent (0). Last 18 mo
- Medium (0)
- Old (0)
- Undated (31)
Footprint by state
Stronger blue = more blocks issued in that state. ● marks states with activity in the last 18 months.
- Indiana IN · 31
Top area codes
Bars show total blocks; red overlay is recent.
Sister OCNs in the Southeastern Indiana Rural Telephone Cooperative Inc group
Same customer-facing carrier, different state-registered OCN. Combined stats are on the Southeastern Indiana Rural Telephone Cooperative Inc group page.
| OCN | Company name on file | HQ state | Total | Recent |
|---|---|---|---|---|
| 4704 | SEI Data Inc - IN | IN | 7 | · |
Sister OCNs under SEI Rural Telephone Cooperative Inc
| OCN | Company | Total | Recent |
|---|---|---|---|
| 4704 | SEI Data Inc - IN | 7 | 0 |
