Prefix 909-274 — Diamond Bar, CA
- Area code
- 909
- Prefix (NXX)
- 274
- Rate center
- Diamond Bar
- State
- California
- Time zone
- Pacific
- Code holder
- CHARTER IP ENABLED SERVICES, LLC
- OCN
- 792K
- Pooled
- Yes (thousands-block pooling)
- Assigned
- 2009-03-27
- LATA
- 730
The 909-274 prefix belongs to area code 909 and is anchored to the Diamond Bar rate center (CA). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.
Diamond Bar is part of the Los Angeles-Long Beach-Anaheim, CA Metropolitan Statistical Area. For routing purposes it sits in LATA 730. Numbers here keep Pacific time.
Code-holder of record: CHARTER IP ENABLED SERVICES, LLC (OCN 792K), assigned March 27, 2009. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 909-274 numbers may be served by different companies.
Caller ID showing 909-274 is not proof the call came from Diamond Bar: spoofing and porting both detach numbers from their origin. To verify a caller, hang up and dial the organization's published number, and report suspicious calls to the FTC.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 909-271 | Rialto | ONVOY, LLC - CA |
| 909-272 | Arrowhead | T-MOBILE USA, INC. |
| 909-273 | Arrowhead | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA |
| 909-275 | Fontana | AT&T ENTERPRISES, LLC |
| 909-276 | Upland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA |
| 909-277 | San Bernardino | METROPCS NETWORKS, LLC |
FAQ
Where is 909-274 located?
The prefix is assigned to the Diamond Bar rate center in CA, area code 909. It is part of the Los Angeles-Long Beach-Anaheim, CA Metropolitan Statistical Area.
Which company owns 909-274 numbers?
CHARTER IP ENABLED SERVICES, LLC holds the code, but the prefix is pooled — individual thousands-blocks can be assigned to other carriers, and numbers may be ported to any provider.
Is a call from 909-274 safe to answer?
The prefix itself says nothing about the caller. Legitimate Diamond Bar businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.