About COTELSER
COTELSER is an internet service provider operating in Argentina (identified in the global routing table as AS266786). 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
- AS266786
- Announced prefixes
- 3 IP blocks
- Network type
- as
- Category
- Cable/DSL/ISP
Source: RIPE NCC
How to get the most accurate COTELSER 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 COTELSER?
The national average in Argentina is 187.7 Mbps download and 95.7 Mbps upload. Anything above that is above average for the country.
Is COTELSER 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 Argentina average.
How can I improve my COTELSER 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 COTELSER support.
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Speed test by city in Argentina
Buenos AiresCórdobaRosarioMendozaTucumánLa PlataMar del PlataSalta