Why is casting not working on my hotel TV?

Hotel Wi-Fi almost always uses client isolation (also called AP isolation), which stops your phone and the TV from reaching each other on the network. Built-in hotel casting systems like Guest Cast, Cast2TV, Nonius, and Otrum try to work around this with their own server, but they often fail when the system is offline, the TV is on a different VLAN, or the captive login portal blocks discovery. Because the isolation is on the hotel's network, no in-LAN casting app can reach the TV either. The most reliable fix is to bypass the hotel network: plug a personal travel streaming stick (Fire TV or Chromecast) into the TV's HDMI port, put both the stick and your phone on your phone's hotspot, and cast over that private network with CastBrowser.

How do I cast to a hotel TV that has a web browser?

If the hotel TV has a working browser and the guest Wi-Fi does not isolate devices from each other, open castb.cc on the TV browser, install CastBrowser on your phone, browse to a compatible web video, tap cast, choose Web Receiver, and enter the short code shown on the TV. The TV becomes the receiving screen. Important: the Web Receiver still streams the video from your phone to the TV across the local network, so if the hotel enforces client isolation, the code will not connect — in that case use the phone-hotspot method with a travel streaming stick instead.

Why does Cast2TV.net or Guest Cast say not working?

Cast2TV.net, Guest Cast, Nonius, Otrum, and similar in-room systems are operated by the hotel, not by you. When they show 'not working' it usually means the in-room media server is offline, the TV is not registered to your room, the casting service was disabled, or the captive portal session expired. The fix is on the hotel's side — contact the front desk. As a guest-side workaround, use a personal travel streaming stick on the TV's HDMI port, or open the CastBrowser Web Receiver on the TV browser if one is available.

Can I use my own Chromecast or Fire Stick in a hotel?

Yes, and this is the most reliable approach. A personal Chromecast or Fire TV Stick plugged into the hotel TV's HDMI port works well — the trick is to avoid the hotel network entirely: create a personal hotspot from your phone, connect both your phone and the stick to that hotspot, then cast over that private network. (Connecting the stick directly to hotel Wi-Fi often fails because the captive login page can't be completed on a device with no browser.) The CastBrowser Web Receiver on the hotel TV's own browser is a no-hardware alternative, but only when the guest Wi-Fi does not isolate devices from each other — otherwise its local stream is blocked just like everything else.

Hotel TV Casting Not Working? Guest Cast & Cast2TV Fixes (2026)

Quick answer

Hotel Wi-Fi uses client (AP) isolation, so your phone and the TV cannot reach each other on the network — which is why Guest Cast, Cast2TV, Nonius, and Otrum keep failing, and why no in-LAN casting app can talk to the hotel TV either. The fix that actually works is to stop using the hotel network: plug a personal travel streaming stick (Fire TV or Chromecast) into the TV's HDMI port, put both the stick and your phone on your phone's hotspot, and cast over that. If the in-room TV has its own browser and the Wi-Fi does not isolate guests, the CastBrowser Web Receiver (castb.cc) is a no-hardware alternative.

Cast to a travel stick over your phone hotspot — free with CastBrowser.

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Why hotel casting systems fail

In-room casting systems are designed around a hard constraint: hotels deliberately separate every guest device so strangers cannot see each other's phones, laptops, and TVs. That same isolation breaks normal casting, which depends on your phone and the TV being able to find one another on the local network.

Client / AP isolation: the single biggest cause. Chromecast, AirPlay, and DLNA discovery are all blocked between guest devices.
Separate VLANs: the TV and your room may be on different network segments that cannot route to each other.
Captive portal: the “accept terms” login page can expire mid-session or block devices that have no browser to log in.
Offline in-room server: Guest Cast, Cast2TV, Nonius, and Otrum each run a hotel-managed server. If it is down or the TV is not registered to your room, the service shows an error you cannot fix.

The fix that actually works: your own hotspot

The only approach that reliably beats client isolation is to take the hotel network out of the loop entirely. Put both the screen and your phone on a private network you control — your phone's hotspot — so they can see each other again.

Plug a personal travel streaming stick (Fire TV Stick or Chromecast) into the in-room TV's HDMI port and switch the TV to that HDMI input.
Turn on the personal hotspot on your phone, and connect the streaming stick to that hotspot. (If you only have one phone, a small travel router or a second device can host the hotspot.)
Install CastBrowser on your phone, also on the hotspot, and browse to a compatible web video.
Tap cast and select the Fire TV or Chromecast — now that both are on your hotspot, discovery works normally.

A USB-C or Lightning-to-HDMI cable from your phone is the simplest no-network fallback if you don't have a streaming stick.

If the TV has a browser and the Wi-Fi doesn't isolate guests

Some hotels (and many serviced apartments) run open guest Wi-Fi without client isolation. If yours does — and the in-room TV has a working browser — the CastBrowser Web Receiver pairs your phone to the TV with a short code, no streaming stick required. It still needs the phone and TV to reach each other on the local network, so this only works when isolation is off.

Open castb.cc on the TV browser and note the short pairing code.
In CastBrowser on your phone, browse to a compatible web video, tap cast, choose Web Receiver, and enter the code.
If the code never connects, the network is isolating guests — fall back to the hotspot method above.

Still want the hotel's own system?

If Guest Cast, Cast2TV, Nonius, or Otrum is the intended in-room system and it shows an error, that server is run by the hotel — ask the front desk to re-register the TV to your room or restart the service. You can't fix it from the guest side.

Cast Around Hotel Wi-Fi with CastBrowser

Download CastBrowser free — cast to a travel streaming stick over your phone hotspot, or use the Web Receiver when guest Wi-Fi allows it.

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