Internet in Simi Valley, California

Four wired networks reach most of the city

The FCC's map counts 36,922 homes and businesses inside Simi Valley's city limits, and as of June 30, 2026 (revision of November 10, 2026) four wired providers report service at most of them. Spectrum reports 97.6%, almost all over cable, with downloads advertised up to 1 Gbps. Anthem Connect reports fiber at 99.9% and GigabitNow at 87.7%, each advertising downloads up to 5 Gbps. AT&T reports 91.6%, but offers 100/20 Mbps at only 23.2%: its fiber covers 9.2%¹ of locations, and elsewhere it reports DSL or fixed wireless.

The table ranks providers by the share of locations where they report service, not by quality or price. "Available" means the provider told the FCC it could install service within ten business days; every claim can be challenged on the FCC map. Locations are buildings and units, not households, and the city is drawn as it was for the 2020 Census.

Fiber went from almost none to almost all

In June 2022, fiber was reported at 3.1%² of Simi Valley's locations. By December 31, 2025 it had reached 62.1%³, and by June 30, 2026, 99.9%. The rise since 2022, 96.9 percentage points, ranks the highest among the 343 cities of 100,000 or more, and the gain in the last six months alone, +37.8 percentage points, is the highest¹.

June 30, 2022December 31, 2025June 30, 2026

Fiber available99.9% +96.9 pts

Two or more fiber networks89.2% +89.2 pts

Three or more wired choices89.1% +89.1 pts

Wired 100/100 Mbps99.9% +96.9 pts

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	3.1%	62.1%	99.9%	96.9 pts
Two or more fiber networks	0.0%	6.4%	89.2%	89.2 pts
Three or more wired choices	0.0%	14.2%	89.1%	89.1 pts
Wired 100/100 Mbps	3.1%	64.2%	99.9%	96.9 pts

The change arrived with two newcomers. Anthem Connect and GigabitNow reported no locations in the city in June 2022; they now report 36,870 and 32,371. AT&T's fiber, at 9.2%, and Spectrum's, at 0.5%¹, cover far less. GigabitNow sells service on Simi Valley FiberCity, which its Simi Valley FAQ describes as a privately funded project with no tax dollars used.

Overlap is now the rule: two or more fiber providers report service at 89.2% of locations, the 3rd highest share among large cities, against 5.8% across California and 12.1%¹ nationally. The FCC records each company's filing separately, so its data do not show whether two fiber providers run their own lines to a street or sell service over the same one.

Three or more wired choices at nine addresses in ten

In June 2022 a single wired provider offered 100/20 Mbps at 80.5%² of locations. That share is now 0.9%, the lowest among large cities, while California as a whole stands at 43.2%. Three or more wired providers at that speed are reported at 89.1% of locations, the 2nd highest share, against 6.5% statewide and 11.1%¹ nationally.

NoneOneTwoThree or more

Simi Valley

Thousand Oaks

California

United States

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
Simi Valley	0.1%	0.9%	10.0%	89.1%
Thousand Oaks	2.7%	14.5%	82.8%	0.0%
California	6.9%	43.2%	43.4%	6.5%
United States	7.8%	36.6%	44.6%	11.1%

The gaps are counted in handfuls of locations. 19 locations have no wired provider at 100/20 Mbps, 0 of them reach that speed only by fixed wireless, and 6¹ count as unserved under the BEAD definition.

Fast uploads arrived with fiber

Before fiber, fast downloads were already common here: a 1 Gbps download, mostly over Spectrum's cable, was advertised at 97.9% of locations in 2022. Uploads were the limit. Gigabit service with uploads of at least 100 Mbps, the FCC's 1,000/100 tier, was advertised at 3.1% of locations in 2022 and at 99.9% in June 2026; symmetrical 100/100 Mbps rose from 3.1% to 99.9%. The fastest advertised download is 2 Gbps or more at 99.9%¹ of locations, up from 2.7%². These are maximum advertised speeds reported by providers, not measurements of what a connection delivers.

Copper stays on the map, wireless thins out

The older networks have not left. AT&T's DSL over telephone copper is reported at 84.9% of locations, a share that ranks tied for 9th highest among large cities, down only 2.7 percentage points since 2022. AT&T reports service at 91.6% of locations, but 100/20 Mbps or more at only 23.2%¹.

Fixed wireless moved the other way. Licensed fixed wireless, which includes 5G home internet, was reported at 97.6%² of locations in 2022 and at 79.6% now, the 15th lowest share among large cities. Unlicensed fixed wireless was reported at 40.5%³ of locations in December 2025 and at 0.0% in June 2026. Verizon offers 100/20 Mbps over the air at 19.8% of locations and T-Mobile at 18.1%¹; tower capacity is shared, so carriers decide eligibility one address at a time.

Simi Valley and the rest of Ventura County

In 2022 Simi Valley had less fiber than Thousand Oaks, Oxnard or Ventura; those cities have changed far less since. Thousand Oaks has fiber at 83.0% of locations, Oxnard at 61.0% and Ventura at 23.8%; across Ventura County the figure is 62.7%. Second fiber networks are rare there: two or more fiber providers are reported at 0.0% of locations in Thousand Oaks, 0.2% in Oxnard and 0.4% in Ventura. Over the hills in Santa Clarita, fiber is at 18.3%¹.

Subscriptions in the Census survey

The Census Bureau's 2025 American Community Survey found 84.7% of Simi Valley households subscribing to cable, fiber or DSL (margin of error ±2.3 percentage points), against 80.0% (±2.8 percentage points⁵) in 2019; the margins are wide enough that the change may not be real. 11.2% relied on a cellular data plan alone and 1.9% had no subscription (±1.1 percentage points⁴). The survey counts households over a year and cannot yet show whether the new fiber networks changed what people buy.

The California page covers Ventura County and every other county in the state.