ZIP route

Cell towers near 94546

Nearest tower sites to Castro Valley in CA, Alameda. Distances are measured from the ZIP centroid.

12 Nearby sites

Ranked by distance from the ZIP centroid

3 Carriers

Distinct tenant brands seen nearby

6 5G-capable sites

At least one carrier reports NR

5 Approximate-only nodes

Crowdsourced equipment with no ASR match

Sites on this route

Ranked tower detail pages for this browse surface, using the same utility-first layout across ZIP, state, county, carrier, and 5G pages.

Castro Valley, CA

Crowdsourced only

Approximate cell site near Castro Valley, CA

Crowdsourced cell site with 1 carrier presences. Approximate OpenCelliD-only site clustered from 1 cell observations across 26 crowd samples within 1000 meters. Confidence: screened. No FCC ASR structure matched inside the 200 meter join radius.

Approximate location near Castro Valley, CA 94546

Unknown height Crowdsourced cell site Unknown / crowdsource-derived 0.1 miles
T-Mobile
LTE

Castro Valley, CA

ASR matched

Castro Valley 21.9 ASR-1286501

21.9 with 2 carrier presences. Joined to nearby OpenCelliD cells within 200 meters of the FCC structure. Closest matched cell was 50 meters away.

3301 Norbridge Avenue

21 ft 21.9 Jaime 0.7 miles
T-Mobile Verizon
5G NR LTE

Castro Valley, CA

Crowdsourced only

Approximate cell site near Castro Valley, CA

Crowdsourced cell site with 3 carrier presences. Approximate OpenCelliD-only site clustered from 33 cell observations across 1049 crowd samples within 1000 meters. Confidence: high. No FCC ASR structure matched inside the 200 meter join radius.

Approximate location near Castro Valley, CA 94546

Unknown height Crowdsourced cell site Unknown / crowdsource-derived 0.7 miles
AT&T T-Mobile Verizon
5G NR LTE

Castro Valley, CA

Crowdsourced only

Approximate cell site near Castro Valley, CA

Crowdsourced cell site with 3 carrier presences. Approximate OpenCelliD-only site clustered from 16 cell observations across 487 crowd samples within 1000 meters. Confidence: high. No FCC ASR structure matched inside the 200 meter join radius.

Approximate location near Castro Valley, CA 94546

Unknown height Crowdsourced cell site Unknown / crowdsource-derived 0.8 miles
AT&T T-Mobile Verizon
5G NR LTE

Castro Valley, CA

ASR matched

Castro Valley 13.7 ASR-1018721

13.7 with 3 carrier presences. Joined to nearby OpenCelliD cells within 200 meters of the FCC structure. Closest matched cell was 200 meters away.

2569 CASTRO VALLEY BLVD

14 ft 13.7 Tom 0.8 miles
AT&T T-Mobile Verizon
5G NR LTE

Castro Valley, CA

ASR matched

Castro Valley 21.3 ASR-1286244

21.3 with 0 carrier presences. Built from FCC ASR registration data; carrier overlays come from nearby OpenCelliD cells.

3541 Quail Ave (BA22926C)

21 ft 21.3 Tom 0.8 miles

Castro Valley, CA

Crowdsourced only

Approximate cell site near Castro Valley, CA

Crowdsourced cell site with 1 carrier presences. Approximate OpenCelliD-only site clustered from 1 cell observations across 50 crowd samples within 1000 meters. Confidence: high. No FCC ASR structure matched inside the 200 meter join radius.

Approximate location near Castro Valley, CA 94546

Unknown height Crowdsourced cell site Unknown / crowdsource-derived 0.9 miles
Verizon
LTE

Castro Valley, CA

ASR matched

Castro Valley 25.0 ASR-1203986

25.0 with 0 carrier presences. Built from FCC ASR registration data; carrier overlays come from nearby OpenCelliD cells.

20600 John Drive

25 ft 25.0 Christopher 1.0 miles

Carrier presence near this ZIP

Counts below show how many nearby sites report each carrier, based on FCC ASR structures joined with crowdsourced OpenCelliD cells.

T-Mobile 7 sites
Verizon 7 sites
AT&T 4 sites

Related routes

Keep drilling down into the adjacent browse pages that give this route more context.

County page

Alameda, CA

761 towers, 4 carriers, 373 approximate sites.

296 5G-capable sites

State page

California

58 counties, 10 carriers, 19274 tower pages.

4303 5G-capable sites

What this page is for

Each route should justify itself as a useful lookup page, not just another filter state.

Weak signal?

Tower distance is the first thing to check

People looking up towers near a home or office are often diagnosing weak signal. Distance to the nearest site explains most of it; terrain and building materials do the rest.

Distance drives signal strength

Precision note

Not every nearby site has an FCC structure match

Small cells and shorter poles frequently never show up in ASR. They are listed here too, labeled as crowdsourced or approximate.

5 approximate nodes in this list

Search tip

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Searching a ZIP code centers results on its centroid. City, county, and carrier pages widen the same view when you want more context.

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