01
Can you work here
57.6Mbps down
40.9Mbps up
8ms latency
65Score / 100
Measured on this block in Jul-Sep 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 | 57.6 | 40.9 | 8 |
| Mobile — your own SIM | 305.5 | 29.9 | — |
Do not plan on tethering here. Mobile upload (29.9 Mbps) is far below the fixed line (40.9 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
Nearby, ranked
| Hotel | Verdict | Down | Up |
|---|---|---|---|
| Penzion Bellevue - Vyhlídka Karlštejn | Workable | 73.2 | 50.6 |
| Koruna | Workable | 73.2 | 50.6 |
| U královny Dagmar | Workable | 70.3 | 50.2 |
| Karlštejn | Workable | 57.6 | 40.9 |
| U Janů | Workable | 57.6 | 40.9 |
| Autokemp Karlštejn | Workable | 54.0 | 39.1 |
| Romantický Hotel Mlýn Karlštejn | Workable | 66.9 | 34.0 |
| Penzion Karlštejn | Workable | 48.5 | 32.7 |