Coverage · ZIP 04421
Internet Providers in Castine, ME (04421)
There are 10 internet providers available in Castine, ME (ZIP 04421), including Fidium, Spectrum, T-Mobile Home Internet. Compare each provider below by technology, maximum advertised speed, and area coverage, then call (833) 261-0564 for help choosing a plan. Coverage data is sourced from the FCC National Broadband Map.
Internet providers in Castine, ME (ZIP 04421)
There are 10 residential internet providers available in Castine, ME (ZIP 04421), including Fidium, Spectrum, T-Mobile Home Internet. The table below lists each provider with its technology type, maximum advertised speeds, and area coverage, sourced from the FCC National Broadband Map.
| Provider | Technology | Max download | Max upload | Area coverage |
|---|---|---|---|---|
| Fidium | Fiber | 2 Gbps | 2 Gbps | 79% |
| Spectrum | Cable | 1 Gbps | 35 Mbps | 79% |
| T-Mobile Home Internet | 5G Home Internet | 100 Mbps | 20 Mbps | 79% |
| Redzone | 5G Home Internet | 50 Mbps | 15 Mbps | 12% |
| AT&T Internet Air | 5G Home Internet | 30 Mbps | 3 Mbps | 48% |
| US Cellular | 5G Home Internet | 25 Mbps | 3 Mbps | 79% |
| Starlink | Satellite | 280 Mbps | 30 Mbps | 100% |
| Viasat | Satellite | 150 Mbps | 3 Mbps | 100% |
| HughesNet | Satellite | 100 Mbps | 5 Mbps | 100% |
| Consolidated | DSL | 80 Mbps | 20 Mbps | 12% |
Internet in Castine, ME — common questions
How many internet providers are available in Castine, ME?
There are 10 internet providers available in Castine, ME (ZIP 04421), including Fidium, Spectrum, T-Mobile Home Internet. Availability varies by exact address.
What is the fastest internet available in 04421?
Fidium offers the highest advertised download speed in Castine, ME at up to 2 Gbps. Actual speeds depend on the plan and your address.
How do I check internet availability at my address in Castine, ME?
Enter your ZIP code on Ziatan to see every provider serving your block, then call (833) 261-0564 for help comparing plans and pricing — free, with no signup required.