Internet in Costa Mesa, California
Fiber is available at 47.7% of the 24,504 homes and businesses the FCC counts in Costa Mesa, and wired broadband of at least 100/20 Mbps at 95.6%. 52.2% of locations have a choice of two or more wired providers at that speed; at 43.4% there is only one.1
FCC National Broadband Map, availability as of June 30, 2026 (data revised November 10, 2026), as reported by providers.
Costa Mesa in California
Costa Mesa is a two-network city: Spectrum's cable reaches nearly every home and business, and AT&T's fiber now reaches 46.7% of them. Fiber from any provider stands at 47.7%, almost exactly California's 47.8%1. Between the last two FCC releases the share with gigabit uploads fell, a reminder that the map is a set of provider filings that can move in either direction.
Spectrum and AT&T, then a wireless layer
The FCC National Broadband Map counts 24,504 homes and businesses inside Costa Mesa's 2020 city limits, as of June 30, 2026 (file revision of November 10, 2026). Two companies report wired service across nearly all of them. Spectrum's network reaches 93.7% and offers 100/20 Mbps at every one of those locations. AT&T reports 91.2%, but over three different technologies: fiber, older DSL on telephone copper, and fixed wireless. It offers 100/20 Mbps at 57.5% of locations and fiber at 46.7%1.
| Spectrum | Fiber Cable | 93.7% | 93.7% | 1 Gbps | 41.6% |
|---|---|---|---|---|---|
| AT&T | Fiber DSL Licensed wireless | 91.2% | 57.5% | 5 Gbps | 1.6% |
| T-Mobile | Licensed wireless | 78.8% | 26.5% | 100 Mbps | – |
| Verizon | Licensed wireless | 74.8% | 36.9% | 300 Mbps | – |
| Cosmo Network Solutions, LLC | Fixed wireless | 18.0% | 11.4% | 350 Mbps | – |
| GeoLinks | Licensed wireless | 2.6% | 2.6% | 1 Gbps | – |
| Cox | Fiber | 0.4% | 0.4% | 2 Gbps | 0.2% |
| Google Fiber | Fiber | 0.3% | 0.3% | 5 Gbps | – |
| Consolidated Smart Broadband Systems | Cable | 0.0% | 0.0% | 500 Mbps | – |
| Frontier | DSL | 0.0% | 0.0% | 10 Mbps | – |
Source: FCC, National Broadband Map, data as of June 30, 2026. Share of the area's broadband serviceable locations where the provider reports service as of June 30, 2026. "Only wired option" is the share of locations where it is the single wired provider at 100/20 Mbps. Provider-reported and challengeable; speeds are advertised maximums, not measured; no prices. Satellite providers (HughesNet, Starlink, Viasat) report service at nearly every location and are left out of the table.
Counting every company, 6 wired providers report service somewhere in the city, down from 62 in June 2022. The smaller wired names cover only small parts of the city: Cox reports fiber at 0.4% of locations and Google Fiber at 0.3%1. "Reports service" means the provider told the FCC it could install service within ten business days; any listing can be challenged on the map.
Fiber: half the city, almost all of it AT&T
Fiber, the share of homes and businesses where at least one provider reports a fiber connection, stands at 47.7%. That is the 81st lowest share among the 343 cities of 100,000 or more, close to California's 47.8% and below the national 62.6%. AT&T accounts for nearly all of it, with fiber at 46.7%; Spectrum reports fiber at 0.9%1.
Fiber rose by 15.3 percentage points between June 2022 and June 2026, while DSL, almost all of it AT&T's copper service, fell from 62.9% to 58.4% of locations. Fiber networks rarely overlap here: only 0.5% of locations have two or more fiber providers, and the number of companies reporting fiber in the city went from 42 to 41.
Source: FCC, National Broadband Map, data as of June 30, 2026. FCC file revision of November 10, 2026. Shares are of broadband serviceable locations (homes and businesses), not people.
Show the numbers
| Area | Fiber available |
|---|---|
| Huntington Beach | 69.9% |
| United States | 62.6% |
| Santa Ana | 53.1% |
| Irvine | 52.3% |
| California | 47.8% |
| Costa Mesa | 47.7% |
| Anaheim | 36.0% |
| Orange | 28.7% |
Among its Orange County neighbors, Costa Mesa sits in the middle. Santa Ana has a similar Spectrum-and-AT&T split; Huntington Beach gets its fiber from Frontier and Irvine is a Cox city where fiber reaches a slightly larger share than here. Anaheim and Orange have less fiber than Costa Mesa.
One fast wire or two, address by address
Where AT&T has fiber, a home has two wired choices at 100/20 Mbps; where AT&T still runs copper, Spectrum is alone. The FCC data split the city almost evenly: 52.2% of locations have two or more wired providers at that speed and 43.4% have exactly one. In every one of those cases it is Spectrum (41.6%). Three wired choices are rare, at 0.4%1.
Source: FCC, National Broadband Map, data as of June 30, 2026. Different wired providers (fiber, cable or DSL; FCC provider IDs) reporting 100 Mbps down and 20 Mbps up or more at the same location. Fixed wireless and satellite are not counted.
Show the numbers
| Area | None | One | Two | Three or more |
|---|---|---|---|---|
| Costa Mesa | 4.4% | 43.4% | 51.8% | 0.4% |
| California | 6.9% | 43.2% | 43.4% | 6.5% |
| United States | 7.8% | 36.6% | 44.6% | 11.1% |
The single-wire share has fallen by 9.2 percentage points since June 2022, from 52.6%2, and by 2.5 percentage points in the latest six months alone. California as a whole has two or more wired choices at 49.9%1 of locations.
A step back in the latest release
Not every measure moved forward. Between the December 31, 2025 release and the June 30, 2026 release, the share of locations with gigabit service including 100 Mbps uploads (the FCC's 1,000/100 tier, wired or fixed wireless) fell by 6.4 percentage points, from 55.7%3 to 49.4%. Among the 343 large cities that change is 10th lowest; fewer than one large city in ten saw a bigger drop. Wired service at 100/100 Mbps fell by 6.0 percentage points over the same six months, even though fiber rose by 1.2 percentage points1.
Source: FCC, National Broadband Map, data as of June 30, 2022; FCC, National Broadband Map, data as of December 31, 2025; FCC, National Broadband Map, data as of June 30, 2026. Shares of broadband serviceable locations in each FCC release (latest revision of each); the small number is the change in percentage points since June 30, 2022. The FCC's count of locations is updated with each release, so shares are compared rather than counts.
Show the numbers
| Measure | June 30, 2022 | December 31, 2025 | June 30, 2026 | Change (points) |
|---|---|---|---|---|
| Fiber available | 32.4% | 46.6% | 47.7% | 15.3 pts |
| Gigabit (1,000/100) | 32.3% | 55.7% | 49.4% | 17.1 pts |
| Wired 100/100 Mbps | 32.4% | 53.7% | 47.7% | 15.3 pts |
| Unlicensed fixed wireless | 0.0% | 51.8% | 18.0% | 18.0 pts |
Over the same period, unlicensed fixed wireless, the share of locations with a wireless provider using unlicensed spectrum, dropped from 51.8% to 18.0%. Cosmo Network Solutions, which reports unlicensed fixed wireless here, now covers 18.0% of locations, and its statewide count of locations changed by −97,0333 locations since December 2025. The filings do not say why a provider reports fewer locations or lower speeds. Over the full period since June 2022 the gigabit share is still up 17.1 percentage points1. Reports like this are why coverage figures for the same city often disagree from one source to the next: a number without its FCC release date can be off by several points.
T-Mobile and Verizon over the air
Fixed wireless home internet from the mobile carriers is reported almost everywhere in Costa Mesa: T-Mobile at 78.8% of locations and Verizon at 74.8%. Fewer locations get 100/20 Mbps from them: 26.5% from T-Mobile and 36.9% from Verizon, whose fastest advertised download is 300 Mbps. Licensed fixed wireless at 100/20 Mbps rose from 5.6%2 of locations in June 2022 to 53.8%. GeoLinks reports licensed wireless at 2.6%, with an advertised maximum of 1 Gbps1. Because a tower sector's capacity is shared, carriers accept or refuse sign-ups by address.
A small group of addresses with no wire
At 91 locations, 0.4% of the city, no provider reports fiber, cable, DSL or licensed fixed wireless at 25/3 Mbps, the definition of unserved used by the federal BEAD program. In June 2022 that share was 0.0%2; the rise of 0.3 percentage points is tied for 8th highest among large cities. At 50 locations satellite is the only service reported, a share that is tied for 14th highest1 among large cities. Small numbers, but for the people at those addresses the city-wide coverage figure does not apply. The FCC map shows what is reported at each one, and the methodology explains how we classify locations.
Many households rely on phone data
The Census Bureau's 2025 American Community Survey counts households, not locations. In Costa Mesa, 76.1% of households subscribed to cable, fiber or DSL (margin of error ±3.8 percentage points), while 16.4% relied only on a cellular data plan (margin ±3.7 percentage points), tied for 52nd highest among large cities by point estimate. In 2019 the cellular-only estimate was 12.9% (margin ±2.5 percentage points5); the margins are wide enough that the survey does not establish a real increase. 3.5%4 had no internet subscription.
Source: FCC, National Broadband Map, data as of June 30, 2026; Census Bureau, American Community Survey 2025 1-year detailed tables. Availability is a share of locations as of June 30, 2026 (FCC); subscriptions are a share of households from the American Community Survey, 2025 (whiskers: 90% margin of error). Different units and dates: read the gap as a sign, not an exact number.
Show the numbers
| Measure | Share | MOE |
|---|---|---|
| Wired 100/20 Mbps available (FCC, share of locations) | 95.6% | |
| Households subscribing to cable, fiber or DSL (Census) | 76.1% | ±3.8 |
| Households relying only on a cellular data plan | 16.4% | ±3.7 |
| Households with no internet subscription | 3.5% | ±1.5 |
In Orange County as a whole, 47.4%1 of locations have a single wired provider at 100/20 Mbps; the California page has the county map.
Questions about internet in Costa Mesa
What internet providers serve Costa Mesa?
Spectrum (cable, 93.7% of locations) and AT&T (91.2%, a mix of fiber, DSL and fixed wireless) report the widest wired service. T-Mobile (78.8%) and Verizon (74.8%1) report fixed wireless home internet. Cosmo Network Solutions and GeoLinks report wireless service in parts of the city, and satellite is reported everywhere. Figures are as of June 30, 2026.
Is fiber internet available in Costa Mesa?
At 47.7% of homes and businesses as of June 30, 2026, up from 32.4%2 in June 2022. AT&T reports almost all of it (46.7% of locations); Spectrum, Cox and Google Fiber report fiber at small shares. Only 0.5%1 of locations have two or more fiber networks.
How many internet providers are there in Costa Mesa?
6 wired providers and 10 terrestrial providers (wired plus fixed wireless) report service somewhere in the city. At a single address the number that matters is smaller: 43.4% of locations have exactly one wired provider at 100/20 Mbps and 52.2%1 have two or more.
Can I get 5G home internet in Costa Mesa?
T-Mobile reports fixed wireless home internet at 78.8% of locations and Verizon at 74.8%, with 100/20 Mbps at 26.5% and 36.9%1 respectively. Carriers decide sign-ups address by address because wireless capacity is shared.
Checking one address in Costa Mesa
The figures on this page describe the whole area. Which providers report service at a single home or apartment is shown only on the FCC's own map: search the address at broadbandmap.fcc.gov. If a provider is listed there but cannot actually connect you within ten business days, or the location is missing or misplaced, the map has a button to file a challenge; providers must respond, and corrections flow into later releases. Prices and plans are not part of the FCC data: each provider must show them on its broadband facts label at the point of sale.
More on internet in California
The state picture, county by county: internet in California. Other large cities in the state: Los Angeles, San Diego, San Jose, San Francisco, Fresno, Sacramento, Long Beach, Oakland, Bakersfield, Anaheim, Stockton and Riverside. Compare Costa Mesa with any other city or state in the comparison tool.
Sources
- FCC, National Broadband Map, data as of June 30, 2026; Availability as of June 30, 2026; released November 10, 2026. broadbandmap.fcc.gov
- FCC, National Broadband Map, data as of June 30, 2022; Availability as of June 30, 2022; released May 10, 2024. broadbandmap.fcc.gov
- FCC, National Broadband Map, data as of December 31, 2025; Availability as of December 31, 2025; released November 3, 2026. broadbandmap.fcc.gov
- Census Bureau, American Community Survey 2025 1-year detailed tables; 2025 (calendar-year sample); released October 29, 2026. api.census.gov
- Census Bureau, American Community Survey 2019 1-year detailed tables; 2019. api.census.gov
Margins of error (±) are at the 90% confidence level. A difference is called significant only when it passes the Census Bureau's test at that level. How every figure is built: methodology. Found an error? Write to [email protected]; corrections are listed on the updates page.