01
Can you work here
Call-ready
medium confidence · 17 tests within ~984 m
106.6Mbps down
70.7Mbps up
9ms latency
79Score / 100
Measured on this block in Apr-Jun 2026 — the ceiling the hotel's WiFi sits under. Shared WiFi, captive portals and per-device caps only make it slower, never faster.
02
Fixed line vs mobile
| Network | Down | Up | Ping |
|---|---|---|---|
| Fixed broadband — what the WiFi runs on | 106.6 | 70.7 | 9 |
| Mobile — your own SIM | 159.3 | 26.5 | — |
Do not plan on tethering here. Mobile upload (26.5 Mbps) is far below the fixed line (70.7 Mbps) — if the room WiFi fails, your phone is not a working backup for calls.
03
Measured in the room
Nobody has posted a real speedtest from this hotel yet.
04
Outages in Czech Republic
| Started | Ended | Network | Cause |
|---|---|---|---|
| 21 Sep 2026, 06:30 UTC | 21 Sep 2026, 08:15 UTC | O2-CZECH-REPUBLIC | technical problem |
Country- and ISP-level outages, not hotel-level. A national outage takes the hotel with it; the hotel's own router failing will never show here.
05
Where it is
06
Nearby, ranked
| Hotel | Verdict | Down | Up |
|---|---|---|---|
| Penzion Karlštejn | Call-ready | 205.8 | 195.5 |
| Autokemp Karlštejn | Call-ready | 239.1 | 239.7 |
| Romantický Hotel Mlýn Karlštejn | Call-ready | 118.8 | 85.0 |
| Penzion Bellevue - Vyhlídka Karlštejn | Workable | 82.5 | 54.7 |
| Koruna | Workable | 82.5 | 54.7 |
| Karlštejn | Risky | 38.7 | 13.7 |
| U Janů | Risky | 38.7 | 13.7 |
| Koruna | Risky | 38.7 | 13.7 |