In Teheran there is 1 residential Fiber provider covering 66.15% of the city. The average home can get speeds up to 121 Mbps. Note that we may have a financial relationship with some of the providers below. This does not influence rankings, and helps us provide high-quality detailed information for free.
This page contains all Fiber internet providers in Teheran, IL.
To see availability maps for all providers including fiber, cable, DSL, and more in Teheran, IL please click below.
Fiber Internet Service Provider in Teheran
Data updated 11/14/2025, based on FCC data from 12/31/2024. This is the most current data available as of .
To avoid wasting your time, providers with less than 1% coverage in Teheran are not shown.
Teheran Satellite TV & Internet Providers
DISH Satellite TV
DIRECTV Satellite TV
Not sure whether to choose Dish or DIRECTV? For most people most of the time we recommend DISH. But click here to learn more.
Viasat Satellite Internet
Where in Teheran is fiber internet available?
Fiber Internet Availability Key
Fiber is available in 66.15% of Teheran. Areas in green have fiber internet service, where areas in yellow or red may not. The most widely available provider is CASSCOMM. Call one of the companies with service in Teheran above to see who has service at your home.
How fast is fiber internet in Teheran?
The map below shows maximum fiber internet speeds by area in Teheran.
Fiber Internet Speed Key
The average Teheran home can get up to 121 Mbps on their fiber internet plan. The fastest fiber download speed in the city is 1,000 Mbps, which 1.54% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 64.62% of homes can only purchase plans up to 100 Mbps. See the internet provider details below for info about their speed and coverage in Teheran.
Fiber internet speeds tend to be faster in the northwest parts of Teheran, and slower in the west areas of the city.
Is fiber the fastest internet I can get in Teheran?
The fastest internet for you may vary based on where in Teheran you live. In general, fixed wireless competes most often with fiber in the city.
- Fiber is the fastest internet type for 36.41% of Teheran homes.
- Cable is fastest for less than 1% of the city.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for 63.59%.
- Satellite internet may be the only option for less than 1% of Teheran homes.
Fiber Providers in Depth
Below you'll find which TV and internet providers offer service in Teheran, along with details on where in Teheran and at what speeds.
CASSCOMM Fiber in Teheran, IL
CASSCOMM fiber coverage
About 66.15%, or 129 people, have CASSCOMM fiber internet available to them in the city. The company covers the west, north, central, northwest, east, southwest, and northeast Teheran area. CASSCOMM is a large internet service provider internet service providers in the US, with internet service available in much of Teheran.
CASSCOMM fiber download speeds
CASSCOMM is average when comparing download speeds to all other internet providers in Teheran. Versus other fiber providers in the area, CASSCOMM fiber is the fastest. There are 2 different maximum speeds throughout Teheran. The fastest plan anyone in Teheran can order from CASSCOMM goes up to 1,000 Mbps, the slowest package only goes up to 100 Mbps, and the city-wide average maximum speed for Teheran customers is up to 121 Mbps.
Show all download speeds
- 2.3% up to 1,000.0 Mbps
- 97.7% up to 100.0 Mbps
CASSCOMM fiber upload speeds
In Teheran download speeds tend to be faster than than upload speeds for CASSCOMM fiber. Compared to other ISPs, CASSCOMM is above average where upload speeds are concerned, and the fastest compared to other Teheran fiber providers. CASSCOMM offers 2 different upload speeds across the city, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Teheran is up to 1,000 Mbps. Some customers have slower plan choices, which only go up to 25 Mbps. On average, CASSCOMM customers can get speeds up to 48 Mbps.
Show all upload speeds
- 2.3% up to 1,000.0 Mbps
- 97.7% up to 25.0 Mbps
Teheran Fiber by Area
This information is most helpful to those looking for homes or considering moving to Teheran or any of the areas nearby.
How does fiber internet in Teheran compare to the rest of Illinois?
Fiber internet speeds in Teheran are much faster versus the average speeds in Illinois: 0.00 Mbps in Illinois versus 121 Mbps in the city. The state has similar fiber availability compared to the city. Average fiber coverage in Illinois is 0.00% versus 66.15% in Teheran.
What zip codes have fiber internet?
Fiber internet coverage varies by zip code and neighborhood. Some examples in or around Teheran are shown below. You can enter any zip code here to see TV and internet providers by zip code.
What does fiber internet look like in other cities?
Below are cities nearby and with similar populations. This comparison can be useful if living somewhere with fast internet is important to you.
Nearby Cities
- Easton, IL: more fiber coverage, faster speeds
- Mason City, IL: more fiber coverage, faster speeds
- Greenview, IL: less fiber coverage, faster speeds
- Poplar City, IL: less fiber coverage, slower speeds
- Oakford, IL: less fiber coverage, faster speeds
- Kilbourne, IL: less fiber coverage, faster speeds
- Natrona, IL: less fiber coverage, faster speeds
- San Jose, IL: less fiber coverage, faster speeds
- Forest City, IL: more fiber coverage, faster speeds
- Topeka, IL: less fiber coverage, faster speeds
Cities with Similar Populations
- Gill, GA: more fiber coverage, faster speeds
- Gilchrist, TN: more fiber coverage, faster speeds
- Georgia, NJ: more fiber coverage, faster speeds
- Gauley Mills, WV: more fiber coverage, faster speeds
- Gardiner, IA: less fiber coverage, faster speeds
- Fugates Hill, VA: more fiber coverage, faster speeds
- Freyburg, TX: more fiber coverage, faster speeds
- Freidberger, MI: more fiber coverage, faster speeds
- South Clinchfield, VA: more fiber coverage, faster speeds
- Frederick, IL: less fiber coverage, slower speeds