| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (210) 521-20** | (210) 521-2000 - (210) 521-2099 | 87 |
| (210) 521-21** | (210) 521-2100 - (210) 521-2199 | 84 |
| (210) 521-22** | (210) 521-2201 - (210) 521-2298 | 89 |
| (210) 521-23** | (210) 521-2300 - (210) 521-2399 | 85 |
| (210) 521-24** | (210) 521-2400 - (210) 521-2499 | 90 |
| (210) 521-25** | (210) 521-2500 - (210) 521-2599 | 93 |
| (210) 521-26** | (210) 521-2600 - (210) 521-2699 | 88 |
| (210) 521-27** | (210) 521-2700 - (210) 521-2799 | 87 |
| (210) 521-28** | (210) 521-2800 - (210) 521-2898 | 84 |
| (210) 521-29** | (210) 521-2900 - (210) 521-2998 | 89 |
US Phone Directory: (210) 521-2***
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