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Phone Numbers: (323) 421-XXXX
Recently Searched Numbers in the 323 Area Code
About the (323) 421 Prefix
The (323) 421 prefix serves Los Angeles, California, United States. Phone numbers in this exchange follow the format (323) 421-XXXX. The primary carrier assigned to this prefix is T-MOBILE USA INC..
(323) 421 Geographic Info
- Primary City
- Los Angeles
- State
- California, United States
- Primary Carrier
- T-MOBILE USA INC.
Other Prefixes in the 323 Area Code
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Apple's Silence Unknown Callers feature (Settings → Phone → Silence Unknown Callers) sends any call from a number not in your Contacts, Recents, or Siri Suggestions directly to voicemail without ringing your phone. The call still appears in your Recents list, and the caller can leave a voicemail.
Read more: How to Stop Spam Calls on iPhone and Android (2026 Guide) →Frequently Asked Questions
What area code is (323) 421?
(323) 421 is a telephone prefix in the 323 area code, which serves Los Angeles, California, United States.
Where is the (323) 421 prefix located?
Phone numbers with the (323) 421 prefix are located in Los Angeles, California, United States. The primary carrier for this prefix is T-MOBILE USA INC..
What carrier uses the (323) 421 prefix?
The primary carrier assigned to the (323) 421 prefix is T-MOBILE USA INC.. However, numbers may be ported to other carriers over time.
How do I look up a phone number with the (323) 421 prefix?
Enter the full 10-digit number (e.g. (323) 421-XXXX) into ClarityCheck's reverse phone lookup to instantly see the owner's name, address, social profiles, and more.