Carrier group · Incumbent Local Exchange Carrier
Southwest Telephone Exchange
Holding: Interstate 35 Telephone Company
Total blocks
3
Recent (18 mo)
0
Medium
0
Old
0
Member OCNs
1
States
1
Area codes
1
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Headquarters: Emerson, IA
Block portfolio at a glance
By age
- Recent (0). Last 18 mo
- Medium (0)
- Old (0)
- Undated (3)
Footprint by state
Stronger blue = more blocks issued in that state. ● marks states with activity in the last 18 months.
- Iowa IA · 3
Top area codes
Bars show total blocks; red overlay is recent.
Member OCNs
1 OCN roll up under Southwest Telephone Exchange.
| OCN | Company name on file | HQ | Type | Total | Recent |
|---|---|---|---|---|---|
| 1301 | Southwest Telephone Exchange Inc | Emerson, IA | Incumbent Local Exchange Carrier | 3 | · |