About Under
Under is an internet service provider operating in Brazil (identified in the global routing table as AS28209). Real-world speeds can differ from advertised plans due to Wi-Fi signal loss, peak-hour network congestion and in-home wiring quality. Official site →
Network technical data
- Autonomous System Number
- AS28209
- Announced prefixes
- 61 IP blocks
- Network type
- as
- Category
- Content
Source: RIPE NCC
How to get the most accurate Under result
- Use Ethernet — Wi-Fi cuts speed by 20–60% depending on distance and interference.
- Close background apps — streaming, cloud sync and updates consume bandwidth during the test.
- Test at different times — evenings are peak hours; compare morning vs. evening to detect congestion.
- Reboot your router — monthly restarts keep firmware fresh and clear connection tables.
Frequently asked questions
What is a good speed for Under?
The national average in Brazil is 306.2 Mbps download and 144 Mbps upload. Anything above that is above average for the country.
Is Under fast?
Speed depends on your specific plan, location and time of day. Run the test above to see your real speed right now and compare it to the Brazil average.
How can I improve my Under speed?
Switch to Ethernet, place your router centrally, restart it monthly, and test during off-peak hours. If you're consistently below your plan, contact Under support.
Other providers in Brazil
Giga+ Fibra - DF/ES/RJVero Internet AS28211Coprel Telecom - 28212LCI TelecomTrucks Control Serviços de Logística LtdaHost OneTCVNETNetRosas TelecomAlares InternetLinca Telecomunicações
Speed test by city in Brazil
São PauloRio de JaneiroBrasíliaSalvadorFortalezaBelo HorizonteManausCuritiba