Local Calling Guide
Area code/prefix search
Joplin, MT
| NPA-NXX | BLOCK | Switch | OCN | LATA | LIR | Eff date | Disc date |
|---|---|---|---|---|---|---|---|
| 406-292 | A | HAVRMTXCDS0 | 2257 TRIANGLE TEL. COOP. ASSN., INC. | 648 | |||
| 406-292 | 1 | 2257 TRIANGLE TEL. COOP. ASSN., INC. | 648 | ||||
| 406-292 | 2 | 9415 LEVEL 3 COMMUNICATIONS, LLC - MT | 648 | 2019-01-18 | |||
| 406-292 | 3 | 2257 TRIANGLE TEL. COOP. ASSN., INC. | 648 | ||||
| 406-292 | 4 | 2257 TRIANGLE TEL. COOP. ASSN., INC. | 648 | ||||
| 406-292 | 7 | 2257 TRIANGLE TEL. COOP. ASSN., INC. | 648 | ||||
| 406-292 | 9 | 2257 TRIANGLE TEL. COOP. ASSN., INC. | 648 |
Last updated: Tue, 13 Jan 2026 21:50:02 UTC
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