topic Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband in Broadband

Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

Luigi — Fri, 10 Oct 2025 20:37:22 GMT

Access to several websites, including dropbox.com, stopped working in the morning today. I've restarted my 5G Home Broadband router but that didn't help. I can access the affected websites over my mobile connection with a different provider.

Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

Luigi — Fri, 10 Oct 2025 21:33:44 GMT

This occasionally happens on the same day of the month I subscribed, as if a configuration was not correctly carried forward. I used the web chat for assistance and the issue was not resolved after yet another router restart, at which point the chat service was also not available until next morning:

Agent: I would request you to please restart the hub once.

You: If I restart the hub, this connection will drop. Is that okay?

Agent: Yes no problem.

Agent: Once you restart the hub, you will be able to access the services

You: Will I need an SMS with a link to rejoin after I restart the hub?

Agent: Yes I will sent it to your notification number

You: Thank you. As soon as I get the link I will restart the hub.

Agent: Once you restart the hub and if the chat drop then I will be able to sent you that link

Agent: Do not worry you can restart the hub now and once done check your services.

You: Okay. Restarting now.

Agent: Thank you

Agent: It looks like we’ve been disconnected, so I will close the chat. You can use the same link to chat again at a more convenient time. Our chat support is available from 9am-8pm on weekdays and from 9am-6pm on weekends.

Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

Longwater — Sat, 11 Oct 2025 07:58:15 GMT

This exact same thing just started happening to me around that time Friday Friday morning with 3 Home Broadband. Some websites are loading just fine, others randomly will not connect at all that normally do without issue, though if I VPN I can connect to them fine again. Also having issues with connected devices, e.g. Amazon Firestick not being able to connect all day.

Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

Longwater — Sat, 11 Oct 2025 07:58:58 GMT

Seems to have started happening for multiple people around the same time, suggesting something systemic.

https://www.reddit.com/r/ThreeUK/comments/1o3axvw/anyone_else_with_massive_dns_issues_today_home/

Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

Wwwally — Sat, 11 Oct 2025 09:25:34 GMT

Me too. Dropbox will not sync. Scanner stopped working to email. wigle.net and pgdp.net sites are inaccessible (just timeout). First detected late morning Friday 10/10/25

Reboot does not solve. Most webpages and apps are working fine, Just a select few not.

I'm using a Three home broadband 4G SIM.

Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

nelnelhk — Sat, 11 Oct 2025 10:28:46 GMT

It happens to me too! I can fix it my using VPN app ... Sounds so strange

Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

pfalkingham — Sat, 11 Oct 2025 11:16:28 GMT

I did loads of testing yesterday. Looks like DNS capture from Three is failing to resolve Ipv6 addresses:

persistent DNS resolution failures when using Three’s 5G home broadband service. The issue is reproducible and affects multiple domains (e.g. basicappleguy.com, GitHub Copilot endpoints).

Symptoms:

Certain domains fail to resolve or time out when using Three’s default DNS servers.
Example:

nslookup basicappleguy.com

Server: 94.197.33.33

*** Request to UnKnown timed-out

Forcing resolution against a public resolver (Google 8.8.8.8 or Cloudflare 1.1.1.1) works immediately:

nslookup basicappleguy.com 8.8.8.8

Non-authoritative answer:

Name: basicappleguy.com

Addresses: 198.185.159.144, 198.49.23.144, 198.49.23.145, 198.185.159.145

Environment:

Three 5G router in IP Passthrough mode → eero mesh router.
DNS on eero set to 8.8.8.8 / 8.8.4.4.
Despite this, DNS queries are still being intercepted and answered by Three’s resolver (94.197.33.33).

Impact:

Some websites and services are completely inaccessible.
GitHub Copilot in VS Code fails to load conversations.
Other domains resolve normally.

___

I sent the above to support chat yesterday, but they of course had to work their way through the script "have you turned the router on/off again? have you reset the Router? have you reset the eero" but I didn't have time to work through all that so i pasted the above and asked them to escalate it.

Unfortunately, from about 10am today the Router won't even connect to Three at all.

It's mildly inconveinient in that when it was connecting I have to use a VPN to use e.g. copilot for coding. But what's worse is that the eero servers aren't reachable. So that means I can't add the second mesh node to my network, even though I can connect to the internet, because eero says the network's offline (it isn't, and I'm using it). So now my mesh network (that I hard reset during trouble shooting) is broken and missing nodes.

[edit] - checked Threes network service checker and the network's down in my area at the moment, so that explains the lack of connection from the Router.

Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

Wobbly1 — Sat, 11 Oct 2025 11:57:10 GMT

Same issues, same time as others.

I changed the APN from 3Internet to three.co.uk, it fixed some issues but then had its own.

I was going to add my VPN on to the router as everything works via VPN, but thought i'd try default APN settings in the router page and it fixed it instantly.

I can access all Alexa services, Nintendo, all my smart home. Web pages that didn't load are loading fine again.

Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

Wobbly1 — Sat, 11 Oct 2025 12:10:18 GMT

I'm not being funny to whom mans these forums, but Three tech support are A JOKE! Hours on the phone "we dont have network issues, you shouldnt play competitive games unless using a hardline". They even offered to cancel my contract "as a solution" to a DNS issue.

"I'm going to adjust your wifi settings" Why? "Because its wireless and has packet loss". There was NO packet loss on my connection, im lusing a LAN and they was actually talking about changing from IPv6 to v4. tried telling me when I go outside its WIFI. It's 5G over LTE, wifi is local.

It took too long just to get an IR raised, because they believe there are no issues. Everything is dismissive. I hate Three with a passion. Already lost 3 phones and tablet last year to ID and not looked back!

They're the worst I've ever had to deal with. If I could get another ISP I'd be gone in an instant.

Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

brillig — Sat, 11 Oct 2025 15:19:43 GMT

me too, dropbox wont connect, my email has stopped sending and receiving, various ports are blocked, and no idea why. Everything works fine if i hotspot from my phone. the network status function on the three website says there is a network issue but no details, could this be the reason? and will they sort it out before we all have to work from home next week?

Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

brillig — Sat, 11 Oct 2025 15:46:32 GMT

so i found where to change the cellular apn (network settings/broadband/cellular apn).... changed it from default and 3internet to three.co.uk and most things are working, except now Gmail no longer sends or receives..... maybe it will sort itself out ...thanks Wobbly1 for the heads up

Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

23588 — Sat, 11 Oct 2025 17:19:04 GMT

I've never used threes default DNS so that rules that out. Problem remains on all of the other popular DNS service providers out there (including three's own).

Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

pfalkingham — Sat, 11 Oct 2025 20:29:48 GMT

As far as I can tell, it's DNS capture by three.

Three seems to be intercepting DNS traffic on port 53, even if you set custom DNS. Unless you’re using DNS-over-HTTPS or a VPN, your queries are still going through Three’s resolvers. Try running nslookup github.com If the “Server” line shows something like 94.197.33.33 or 2a04:…, that’s Three’s DNS.

If you force nslookup github.com 8.8.8.8, it’ll probably work, which proves the intercept:

PS C:\Users\pfalk> nslookup github.com
Server: UnKnown
Address: 2a04:4a45:9:b:188:31:250:128

*** UnKnown can't find github.com: No response from server

PS C:\Users\pfalk> nslookup github.com 8.8.8.8
Server: dns.google
Address: 8.8.8.8

Non-authoritative answer:
Name: github.com
Address: 20.26.156.215

Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

pfalkingham — Sat, 11 Oct 2025 20:50:02 GMT

Even if you’ve set custom DNS, it looks like Three intercepts all DNS traffic on port 53 and redirects it to their own resolvers. Unless you’re using DNS-over-HTTPS (DoH) or a VPN, your queries still go through Three’s DNS.

You can test it like this:

nslookup github.com

→ If the “Server” line shows something like 94.197.33.33 or 2a04:…, that’s Three’s DNS.

Then run:

nslookup github.com 8.8.8.8

→ If that works instantly, it confirms the interception.

here's my input and output for the above:

PowerShell 7.5.3
PS C:\Users\pfalk> nslookup github.com
Server: UnKnown
Address: 2a04:4a45:9:b:188:31:250:128

*** UnKnown can't find github.com: No response from server
PS C:\Users\pfalk> nslookup github.com 8.8.8.8
Server: dns.google
Address: 8.8.8.8

Non-authoritative answer:
Name: github.com
Address: 20.26.156.215

The only way to truly bypass it is to use DoH or a VPN.

Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

pfalkingham — Sat, 11 Oct 2025 20:51:39 GMT

You can test it like this:

nslookup github.com

→ If the “Server” line shows something like 94.197.33.33 or 2a04:…, that’s Three’s DNS.

Then run:

nslookup github.com 8.8.8.8

→ If that works instantly, it confirms the interception.

here's my input and output for the above:

PowerShell 7.5.3
PS C:\Users\pfalk> nslookup github.com
Server: UnKnown
Address: 2a04:4a45:9:b:188:31:250:128

*** UnKnown can't find github.com: No response from server
PS C:\Users\pfalk> nslookup github.com 8.8.8.8
Server: dns.google
Address: 8.8.8.8

Non-authoritative answer:
Name: github.com
Address: 20.26.156.215

The only way to truly bypass it is to use DoH or a VPN.

Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

pfalkingham — Sat, 11 Oct 2025 20:52:57 GMT

You can test it like this:

nslookup github.com

→ If the “Server” line shows something like 94.197.33.33 or 2a04:…, that’s Three’s DNS.

Then run:

nslookup github.com 8.8.8.8

→ If that works instantly, it confirms the interception.

here's my input and output for the above:

PowerShell 7.5.3
PS C:\Users\pfalk> nslookup github.com
Server: UnKnown
Address: 2a04:4a45:9:b:188:31:250:128

*** UnKnown can't find github.com: No response from server
PS C:\Users\pfalk> nslookup github.com 8.8.8.8
Server: dns.google
Address: 8.8.8.8

Non-authoritative answer:
Name: github.com
Address: 20.26.156.215

The only way to truly bypass it is to use DoH or a VPN.

Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

RogerD — Sun, 12 Oct 2025 08:35:38 GMT

Same - Friday afternoon our Harmony Remote hub stopped working. Harmony webserver unreachable.
- then I noticed Dropbox on my PC can't see the internet

- Today I discovered no pages on Aliexpress will load after the images. All pages give a 404 error.

Tried all sorts then found this thread.

Have changed the APN to three.co.uk which has made Aliexpress work, Harmony app / webserver work, and dropbox is back online

Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

pfalkingham — Sun, 12 Oct 2025 08:36:26 GMT

You can test it like this:

nslookup github.com

→ If the “Server” line shows something like `94.197.33.33` or `2a04:…`, that’s Three’s DNS.

Then run:

nslookup github.com 8.8.8.8

which forces googles DNS, and it should return full details.

___

Following @Wobbly1 I changed APN to three.co.uk and now the broken sites work, but I still get the same output as above from nslookup, which I think means it's still using three's DNS servers, but now has a better fallback for IPv4?

Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

pfalkingham — Sun, 12 Oct 2025 08:38:30 GMT

Thank you - changing the APN to three.co.uk worked for me.

Re: Several websites stopped working at around 10:00 AM today through my 5G Home Broadband

EofP — Sun, 12 Oct 2025 18:41:54 GMT

The page for my solar setup (www.foxesscloud.com) stopped responding, and my inverter was also unable to report stats.

The three.co.uk APN profile change just worked for me too.