01
Can you work here
23.1Mbps down
5.6Mbps up
11ms latency
31Score / 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 | 23.1 | 5.6 | 11 |
| Mobile — your own SIM | 162.2 | 39.2 | — |
Your SIM may beat the WiFi. Mobile upload here (39.2 Mbps) tests higher than the fixed line — worth trying both before you rearrange your day around the room WiFi.
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
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 Vinice | Call-ready | 106.6 | 70.7 |
| 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 |