| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 451-20** | (510) 451-2000 - (510) 451-2099 | 63 |
| (510) 451-21** | (510) 451-2100 - (510) 451-2198 | 68 |
| (510) 451-22** | (510) 451-2200 - (510) 451-2299 | 67 |
| (510) 451-23** | (510) 451-2300 - (510) 451-2399 | 68 |
| (510) 451-24** | (510) 451-2400 - (510) 451-2499 | 49 |
| (510) 451-25** | (510) 451-2500 - (510) 451-2599 | 65 |
| (510) 451-26** | (510) 451-2600 - (510) 451-2698 | 66 |
| (510) 451-27** | (510) 451-2701 - (510) 451-2799 | 66 |
| (510) 451-28** | (510) 451-2800 - (510) 451-2899 | 67 |
| (510) 451-29** | (510) 451-2900 - (510) 451-2997 | 68 |
US Phone Directory: (510) 451-2***
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