About CERNET
CERNET is an internet service provider operating in Brazil (identified in the global routing table as AS265389). 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
- AS265389
- Announced prefixes
- 4 IP blocks
- Network type
- as
- Category
- NSP
Source: RIPE NCC
How to get the most accurate CERNET 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 CERNET?
The national average in Brazil is 306.2 Mbps download and 144 Mbps upload. Anything above that is above average for the country.
Is CERNET 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 CERNET 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 CERNET support.
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Speed test by city in Brazil
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