Sioux City, Iowa Internet Outage Today
Live Sioux City internet outage reports and how households here get online.
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No internet outage reports in Sioux City, Iowa in the last 24 hours
Internet access in Sioux City
About 1 in 8 Sioux City households has no internet subscription at all.
8 home internet providers reach at least 5% of the city's 37,373 homes. Satellite service is excluded. Source: FCC National Broadband Map, December 2025 data.
- Broadband subscription: 86.9% of 32,926 households (Iowa 88.9%, US 91%). Source: US Census Bureau, ACS 2020–2024 (table S2801)
- Fiber to the home: available at 77.1% of 37,373 homes (US 55.9%). Gigabit plans: 76.7%. Cable: 97.8%.
- Home internet providers filing coverage here: Sparklight (98% of homes), CenturyLink / Quantum Fiber (86% of homes), Metronet (74% of homes), AT&T (41% of homes), Nextlink Internet (17% of homes). 5G home or mobile coverage: 99.7% of the city area. Source: FCC National Broadband Map, Dec 2025 data
- Rank: lowest of 4 Iowa cities we track (highest: Cedar Rapids, 91.2%).
- Cable, fiber or DSL: 70.5%. Cellular data only: 13.4% (US 11.5%). Satellite: 9.8%.
- No internet subscription: 12.9%. No computer or smartphone: 6.2%. One of the wider digital gaps among the cities on this site. Source: US Census Bureau, ACS 2020–2024 (table S2801)
- Grid reliability, 2024: MidAmerican Energy customers averaged 219 minutes without power. Source: EIA Form 861, 2024 reliability data
- Woodbury County storm record since 2015: 231 reports; power outages named in 11 episodes. Source: NOAA Storm Events Database
Source: Census ACS 2020–2024.
Source: FCC National Broadband Map, December 2025 data.
Sioux City is 6th of 6 nearby cities on this measure. Source: Census ACS 2020–2024.
| City | Widest wired provider | Fiber | Gigabit plans | No internet subscription |
|---|---|---|---|---|
| Sioux City, IA | Sparklight (98%) | 77.1% | 76.7% | 12.9% |
| Sioux Falls, SD | Midco (99%) | 64.3% | 91.3% | 6.5% |
| Omaha, NE | Cox (92%) | 75.4% | 86.5% | 8.4% |
| Lincoln, NE | Allo Communications LLC (100%) | 99.9% | 99.9% | 7.1% |
| Grand Island, NE | Nedelco, Inc. (100%) | 99.7% | 99.7% | 10.4% |
Source: FCC National Broadband Map, December 2025 data; Census ACS 2020–2024.
Checked September 2026.
Internet providers in Sioux City
Share of Sioux City homes each provider reported it can serve, in FCC filings for December 2025: Sparklight (98%), CenturyLink / Quantum Fiber (86%), Metronet (74%), Verizon (51%), and T-Mobile Home Internet (49%). Check your own address on the FCC National Broadband Map. If the lights are out too, see Sioux City power outages.
Router checks: internet outage guide. Nationwide: US internet outages.
Who to check first in Sioux City
The providers with the widest reported coverage in Sioux City. Start with the one on your bill.
Sparklight in Sioux City
Reach: reports service to 98% of Sioux City homes. Network: Cable, run by Sparklight (Cable One).
Where to check: Sign in to the Sparklight app or sparklight.com to see service alerts for your address.
Support: 877-692-2253
CenturyLink / Quantum Fiber in Sioux City
Reach: reports service to 86% of Sioux City homes. Network: DSL and fiber (Quantum Fiber), run by Lumen.
Where to check: Sign in to the CenturyLink app or centurylink.com to check for a service outage at your address.
AT&T in Sioux City
Reach: reports service to 41% of Sioux City homes. Network: Fiber, DSL/IPBB and AT&T Internet Air (fixed wireless), run by AT&T.
Where to check: Use AT&T's outage check in the Smart Home Manager app or on att.com after signing in.
Support: 800-288-2020
Backup internet options in Sioux City
Sparklight (98% of homes) and CenturyLink / Quantum Fiber (86%) each report service to more than half of Sioux City homes. At an address that can get both, they run on separate lines.
Home 5G and fixed-wireless plans from Verizon (51%) and T-Mobile Home Internet (49%) report coverage of Sioux City homes (Verizon’s figure combines Fios fiber and 5G Home). They run over cell towers rather than cable or fiber, so they can work when a wired network is down. Cell coverage by area is 100% for 4G LTE and 99.7% for 5G.
About 13.4% of Sioux City households, roughly 4,400 homes, get online only through a cell plan. For them a mobile outage is an internet outage.
Power and weather behind internet outages in Sioux City
MidAmerican Energy customers averaged 219 minutes without power in 2024, across 1.27 interruptions each, against 167 minutes for Iowa as a whole. Cable nodes and fiber cabinets run on batteries that last hours, not days, so a long power cut can take internet down even for homes whose own power has returned. See Sioux City power outages when both go out together.
Woodbury County logged 231 storm reports since 2015, most often thunderstorm wind, hail, and flood. Reports peak in June. Power outages were named in 11 of those storm episodes. Wind, ice and flooding damage poles and buried lines, which is how a storm turns into an internet outage as well as a power outage.
Fiber reports reach 77.1% of Sioux City homes, cable 97.8% and copper lines 85.4%. Where fiber runs to the home, a red or blinking LOS light on the optical terminal points to a line problem that a restart will not fix.
Sioux City internet outage questions
Does a cell network outage take down home internet in Sioux City?
For the 13.4% of Sioux City households that rely only on a mobile data plan, yes. The 70.5% with cable, fiber or DSL are not affected.
What can I use for internet in Sioux City when my provider is down?
A phone hotspot: 4G LTE covers 100% of Sioux City by area and 5G 99.7%. Home 5G plans: Verizon (51%) and T-Mobile Home Internet (49%). Where both Sparklight and CenturyLink / Quantum Fiber are available, the second wired line is a backup.
Can a power outage take internet down in Sioux City?
Yes, a long power cut can. MidAmerican Energy customers averaged 219 minutes without power in 2024. NOAA records name power outages in 11 storm episodes in Woodbury County since 2015.
Is fiber or gigabit internet available in Sioux City?
Fiber is reported at 77.1% of Sioux City homes (US 55.9%, Iowa 73%), and plans of 1 Gbps or faster at 76.7% (US 69.2%).
How many Sioux City households have no home internet?
About 4,200 of 32,926 households, or 12.9%, have no internet subscription of any kind, and another 13.4% rely only on a cell plan (Census ACS 2020–2024).
Which internet provider covers the most homes in Sioux City?
Sparklight, at 98% of homes in its FCC filing. Fiber reaches 77.1% of Sioux City homes and gigabit plans 76.7%.
ISP outage status for Sioux City
More outage pages for Sioux City and nearby
Other outage types in Sioux City
Internet Outages in cities near Sioux City
- Sioux Falls, SD 74 mi
- Omaha, NE 89 mi
- Bellevue, NE 98 mi
- Lincoln, NE 118 mi
- Grand Island, NE 148 mi
- Des Moines, IA 156 mi
Report counts are user-submitted; other figures name their official source. How our data works
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