Local Calling Guide
Area code/prefix search
Switch: TCSNAZMAXRY
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- Switch type: POI
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| NPA-NXX | BLOCK | Rate Centre | Region | OCN | LATA | LIR | Eff date | Disc date |
|---|---|---|---|---|---|---|---|---|
| 520-737 | A | Sierra Vista | AZ | 907K ALLO COMMUNICATIONS LLC | 668 | |||
| 520-737 | 5 | Sierra Vista | AZ | 907K ALLO COMMUNICATIONS LLC | 668 | 2024-08-16 | ||
| 520-785 | A | Tucson | AZ | 907K ALLO COMMUNICATIONS LLC | 668 | 2025-12-19 | ||
| 520-785 | 5 | Tucson | AZ | 907K ALLO COMMUNICATIONS LLC | 668 | 2025-12-19 |
Last updated: Thu, 16 Jul 2026 02:21:55 UTC
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