| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (520) 544-50** | (520) 544-5000 - (520) 544-5000 | 1 |
| (520) 544-51** | (520) 544-5120 - (520) 544-5198 | 62 |
| (520) 544-52** | (520) 544-5210 - (520) 544-5292 | 5 |
| (520) 544-53** | (520) 544-5333 - (520) 544-5398 | 3 |
| (520) 544-54** | (520) 544-5430 - (520) 544-5442 | 2 |
| (520) 544-55** | (520) 544-5505 - (520) 544-5598 | 50 |
| (520) 544-56** | (520) 544-5600 - (520) 544-5698 | 73 |
| (520) 544-57** | (520) 544-5700 - (520) 544-5798 | 83 |
| (520) 544-58** | (520) 544-5800 - (520) 544-5871 | 5 |
| (520) 544-59** | (520) 544-5900 - (520) 544-5999 | 29 |
US Phone Directory: (520) 544-5***
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