Rialto, CA — rate center
- State
- California
- Active prefixes
- 39
- Carriers
- 14
- Pooled prefixes
- 33
- LATA
- 730
- Metro area
- Riverside-San Bernardino-Ontario, CA MSA
Rialto 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.
NANPA records show 39 active prefixes here, held by 14 different carriers. Pooling applies to 33 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 Rialto numbers can look completely different while being neighbors — check the prefix, not just the area code.
As always with US numbering: a prefix anchored to Rialto tells you where the block was issued. The person calling may have ported the number, moved away, or be spoofing it entirely — verify callers through independently found contact details.
Prefixes anchored to Rialto
| Prefix | Code holder | Pooled |
|---|---|---|
| 909-233 | METROPCS NETWORKS, LLC | Yes |
| 909-237 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Yes |
| 909-258 | METROPCS NETWORKS, LLC | Yes |
| 909-265 | METROPCS NETWORKS, LLC | Yes |
| 909-271 | ONVOY, LLC - CA | Yes |
| 909-301 | BANDWIDTH.COM CLEC, LLC - CA | Yes |
| 909-341 | TWC IP ENABLED SERVICES, LLC | Yes |
| 909-419 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Yes |
| 909-421 | PACIFIC BELL | No |
| 909-440 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Yes |
| 909-442 | T-MOBILE USA, INC. | Yes |
| 909-543 | LEVEL 3 COMMUNICATIONS, LLC - CA | Yes |
| 909-546 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 909-562 | PACIFIC BELL | Yes |
| 909-566 | BANDWIDTH.COM CLEC, LLC - CA | Yes |
| 909-586 | LEVEL 3 COMMUNICATIONS, LLC - CA | Yes |
| 909-640 | AT&T ENTERPRISES, LLC | Yes |
| 909-644 | LEVEL 3 COMMUNICATIONS, LLC - CA | Yes |
| 909-666 | BANDWIDTH.COM CLEC, LLC - CA | Yes |
| 909-676 | METROPCS NETWORKS, LLC | Yes |
| 909-685 | NEW CINGULAR WIRELESS PCS, LLC | Yes |
| 909-745 | T-MOBILE USA, INC. | Yes |
| 909-746 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | Yes |
| 909-787 | ONVOY, LLC - CA | Yes |
| 909-820 | PACIFIC BELL | No |
| 909-873 | PACIFIC BELL | No |
| 909-874 | PACIFIC BELL | No |
| 909-875 | PACIFIC BELL | No |
| 909-877 | PACIFIC BELL | No |
| 909-879 | PACIFIC BELL | Yes |
| 909-955 | METROPCS NETWORKS, LLC | Yes |
| 909-961 | T-MOBILE USA, INC. | Yes |
| 909-990 | TWC IP ENABLED SERVICES, LLC | Yes |
| 909-999 | BANDWIDTH.COM CLEC, LLC - CA | Yes |
FAQ
What area code is Rialto, CA?
Rialto is served by 2 area codes — 840, 909 — which overlay the same territory.
How many prefixes does Rialto have?
39 active NXX prefixes are anchored to this rate center in NANPA records, held by 14 carriers.
Is a call from a Rialto prefix really from Rialto?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.