| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (909) 421-00** | (909) 421-0000 - (909) 421-0086 | 4 |
| (909) 421-01** | (909) 421-0100 - (909) 421-0199 | 71 |
| (909) 421-02** | (909) 421-0200 - (909) 421-0299 | 65 |
| (909) 421-03** | (909) 421-0300 - (909) 421-0398 | 68 |
| (909) 421-04** | (909) 421-0400 - (909) 421-0499 | 78 |
| (909) 421-05** | (909) 421-0500 - (909) 421-0598 | 77 |
| (909) 421-06** | (909) 421-0600 - (909) 421-0696 | 76 |
| (909) 421-07** | (909) 421-0700 - (909) 421-0798 | 74 |
| (909) 421-08** | (909) 421-0800 - (909) 421-0899 | 76 |
| (909) 421-09** | (909) 421-0900 - (909) 421-0999 | 71 |
US Phone Directory: (909) 421-0***
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