Internet providers in Castro Valley, CA
City-level estimate
Provider mix signal
When verified fields exist
Data from FCC Broadband Data Collection
Top-ranked provider
AT&T
AT&T Fiber 5 Gbps plan
All providers in Castro Valley
4 optionsPlans
- Google Fiber 1 Gig1.0 Gbps · $70/mo
- Google Fiber 2 Gig2.0 Gbps · $100/mo
- Google Fiber 5 Gig5.0 Gbps · $125/mo
- Google Fiber 8 Gbps8.0 Gbps · $150/mo
Plans
- Cox Fast 300 Mbps300 Mbps · $55/mo
- Cox Go Even Faster 500 (Gbps)1.0 Gbps · $80/mo
- Cox Go Super Fast 1 Gbps1.0 Gbps · $95/mo
- Cox Go Beyond Fast (2 Gbps)2.0 Gbps · $115/mo
Plans
- Viasat Unlimited Silver 252.0 Gbps · $70/mo
- Viasat Unlimited Silver 25300 Mbps · $70/mo
Best for your use case
Picked from real plans available in Castro Valley.
Best for streaming
Highest sustained download speed for 4K and multi-device.
AT&T
AT&T Fiber 5 Gbps plan
Best for gaming
Lowest latency potential via highest upload speeds.
Google Fiber
Google Fiber 8 Gbps
Best on a budget
Lowest monthly price with a real plan backing it.
AT&T
AT&T Fiber 300 Mbps plan
Best for rural
Wireless or satellite coverage where wired options are limited.
Viasat
Viasat Unlimited Silver 25
About internet in Castro Valley
Castro Valley, CA has 4 residential internet providers reporting service in the FCC Broadband Map. Advertised download speeds average 2.2 Gbps across the 13 plans tracked here. 4 of those providers offer fiber or gigabit-tier service, which typically means symmetric uploads and lower latency than cable or DSL.
13 plans tracked · Source: FCC Broadband Data Collection / Broadband Map + provider plan data
Frequently asked questions
Nearby cities
ZIP codes in Castro Valley, CA
Provider availability is block-level. Jump to your ZIP code for the exact plans and prices at your address.
Internet in Castro Valley, CA
We track 4 internet providers serving Castro Valley, CA and a combined 13 plans. Tracked plans range from an entry price of $50/mo up to speeds of 8 Gbps. Names in our Castro Valley data include AT&T, COX, and Google Fiber. Coverage spans fiber and satellite, which gives Castro Valley a range of speed-and-price tradeoffs. Notably, fiber reaches Castro Valley, bringing matched upload speeds and steadier latency for calls and gaming. Use the availability checker below to narrow the list to providers that actually serve your address — footprints are block-level in most metros.
- Providers tracked
- 4
- Plans tracked
- 13
- Max speed
- 8 Gbps
- Lowest price
- $50.00/mo
- Connection types
- Fiber • Satellite
- Fiber
- Available
Top Castro Valley plans we track
Live pricing and speed ranges from the Konecteaze database. Block-level availability depends on your address.
AT&T
INTERNET
COX
INTERNET
Google Fiber
FIBER
Viasat
SATELLITE
Source: Konecteaze provider database; verify final availability and terms with the provider
AT&T vs COX in Castro Valley
Both AT&T and COX compete in Castro Valley. Your best choice depends on what's actually available at your address and whether you value price, upload speed, or bundle options.
Frequently asked questions
How many internet providers are there in Castro Valley, CA?
Konecteaze currently tracks 4 internet providers serving Castro Valley, CA, with 13 plans across fiber, cable, DSL, 5G home, and satellite. Availability varies block-by-block — always confirm by zip code.
Who are the top internet providers in Castro Valley?
In our Castro Valley data, AT&T, COX, Google Fiber are the most widely available. Your actual options depend on your address — fiber footprints in particular are block-level, so two neighbouring streets can have very different menus.
What's the cheapest internet plan in Castro Valley, CA?
The lowest advertised plan we track for Castro Valley starts at $50/mo. Promo pricing expires, so the number you see at checkout may differ — we keep this page refreshed but always verify on the provider's site before you commit.
Is fiber internet available in Castro Valley?
Yes — we see fiber coverage in Castro Valley today. That includes symmetrical upload speeds and typically lower latency for gaming and video calls. The exact fiber provider at your address depends on block-level buildouts.
What's the fastest internet speed available in Castro Valley?
The top advertised speed in our Castro Valley data is 8 Gbps. Multi-gig plans are becoming more common; actual speed depends on the technology and plan tier you pick.
How do I switch internet providers in Castro Valley?
Start by comparing plans on this page, confirm availability at your exact address, schedule install with the new provider, then cancel the old one once you're live. Many providers in Castro Valley offer self-install kits to avoid a tech visit.
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