Coverage · ZIP 91789
Internet Providers in Diamond Bar, CA (91789)
There are 8 internet providers available in Diamond Bar, CA (ZIP 91789), including Frontier Fiber, Verizon 5G Home, T-Mobile Home Internet. Compare each provider below by technology, maximum advertised speed, and area coverage, then call (833) 261-0564 for help choosing a plan. Coverage data is sourced from the FCC National Broadband Map.
Internet providers in Diamond Bar, CA (ZIP 91789)
There are 8 residential internet providers available in Diamond Bar, CA (ZIP 91789), including Frontier Fiber, Verizon 5G Home, T-Mobile Home Internet. The table below lists each provider with its technology type, maximum advertised speeds, and area coverage, sourced from the FCC National Broadband Map.
| Provider | Technology | Max download | Max upload | Area coverage |
|---|---|---|---|---|
| Frontier Fiber | Fiber | 7 Gbps | 7 Gbps | 55% |
| Verizon 5G Home | 5G Home Internet | 300 Mbps | 30 Mbps | 63% |
| T-Mobile Home Internet | 5G Home Internet | 100 Mbps | 20 Mbps | 76% |
| AT&T Internet Air | 5G Home Internet | 100 Mbps | 20 Mbps | 75% |
| Starlink | Satellite | 280 Mbps | 30 Mbps | 100% |
| Viasat | Satellite | 150 Mbps | 3 Mbps | 100% |
| HughesNet | Satellite | 100 Mbps | 5 Mbps | 100% |
| Frontier | DSL | 45 Mbps | 3 Mbps | 20% |
Internet in Diamond Bar, CA — common questions
How many internet providers are available in Diamond Bar, CA?
There are 8 internet providers available in Diamond Bar, CA (ZIP 91789), including Frontier Fiber, Verizon 5G Home, T-Mobile Home Internet. Availability varies by exact address.
What is the fastest internet available in 91789?
Frontier Fiber offers the highest advertised download speed in Diamond Bar, CA at up to 7 Gbps. Actual speeds depend on the plan and your address.
How do I check internet availability at my address in Diamond Bar, CA?
Enter your ZIP code on Ziatan to see every provider serving your block, then call (833) 261-0564 for help comparing plans and pricing — free, with no signup required.