Calimesa, CA — rate center
- State
- California
- Active prefixes
- 16
- Carriers
- 8
- Pooled prefixes
- 13
- LATA
- 730
- Metro area
- Riverside-San Bernardino-Ontario, CA MSA
Calimesa is a telephone rate center in California served by area codes 840, 909. A rate center is the locality the phone industry uses to anchor numbers for billing; every prefix listed below is registered here.
The rate center currently carries 16 working prefixes, held by 8 different carriers. Pooling applies to 13 of them — individual thousands-blocks may belong to different companies.
The rate center belongs to the Riverside-San Bernardino-Ontario, CA Metropolitan Statistical Area. Routing-wise it sits in LATA 730.
Because 840, 909 all serve this territory, two Calimesa numbers can look completely different while being neighbors — check the prefix, not just the area code.
A Calimesa prefix on caller ID is a starting point, not proof of origin — numbers travel with their owners and displays can be spoofed. Use official callback numbers for anything sensitive.
Prefixes anchored to Calimesa
| Prefix | Code holder | Pooled |
|---|---|---|
| 909-316 | BANDWIDTH.COM CLEC, LLC - CA | Yes |
| 909-372 | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | Yes |
| 909-446 | FRONTIER CALIFORNIA INC. | Yes |
| 909-500 | ONVOY, LLC - CA | Yes |
| 909-504 | T-MOBILE USA, INC. | Yes |
| 909-570 | PACIFIC BELL (COMPETITIVE) | Yes |
| 909-768 | T-MOBILE USA, INC. | Yes |
| 909-769 | NEW CINGULAR WIRELESS PCS, LLC | Yes |
| 909-790 | FRONTIER CALIFORNIA INC. | No |
| 909-795 | FRONTIER CALIFORNIA INC. | No |
| 909-797 | FRONTIER CALIFORNIA INC. | No |
| 909-845 | T-MOBILE USA, INC. | Yes |
| 909-918 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Yes |
FAQ
What area code is Calimesa, CA?
Calimesa is served by 2 area codes — 840, 909 — which overlay the same territory.
How many prefixes does Calimesa have?
16 active NXX prefixes are anchored to this rate center in NANPA records, held by 8 carriers.
Is a call from a Calimesa prefix really from Calimesa?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.