Subdomains created on Cloudflare not working

Website, Application, Performance DNS & Network
1

What is the name of the domain?

subdomain.example.com

What is the error message?

DNS_PROBE_FINISHED_NXDOMAIN

What is the issue you’re encountering

I created a subdomain using Cloudflare and added all the DNS records properly, but whenever I try to access the subdomain it shows DNS_PROBE_FINISHED_NXDOMAIN error. I also added a subdomain in my Cloudflare R2 bucket and Cloudflare automatically created and connected that subdomain to that bucket, but whenever I try to access the files in the bucket using that subdomain it shows ERR_CONNECTION_TIMED_OUT.

What feature, service or problem is this related to?

DNS records

Screenshot of the error

2025-04-21 11_21_06-.png
2025-04-21 11_21_06-.png1366×679 11.9 KB

2

Can you give the domains and subdomains?

1 Like
4

The subdomains are cdn.iprokashsingha.com which is automatically created and connected by Cloudflare to my Cloudflare R2 bucket and another one is test.iprokashsingha.com which I pointed through A record.

5

Both are resolving to Cloudflare ok…

dig +short cdn.iprokashsingha.com
104.21.54.31
172.67.223.25

dig +short test.iprokashsingha.com
104.21.54.31
172.67.223.25

test is returning a 525 error which means there’s a problem with the SSL configuration on your origin…
https://cf.sjr.dev/tools/check?d380519106844bb0986175f26937fe11#connection-server-https

cdn is pointing to the R2 bucket ok.

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6

How can I resolve this issue? My root domain is working good with my SSL.

7

Set the record for test to DNS only, then debug the SSL on your origin. When you have fixed it you can proxy the record again.

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8

R2 link is also not working.

9

..this just responds with an R2 404 page. If you don’t have an index.html there, then that’s expected. Otherwise, check a link that matches an object you have in R2.

1 Like
11

Here’s a link to a file in my R2 bucket. It’s still showing error.

https://cdn.iprokashsingha.com/khoka-rendition.jpg

12

It loads ok for me, what error do you see?

13

I see this error page.

2025-04-22 08_26_30-
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14

It is still working ok for me…
https://cf.sjr.dev/tools/check?411f651fc01b400392a1cf5c004a535f#connection-server-https

Try a trace route to see if it is being blocked by your ISP. If you have DNS issues, try a public resolver like 1.1.1.1, 8.8.8.8 or 9.9.9.9 instead of your ISP’s resolver.

1 Like
15

Tried using 1.1.1.1, still doesn’t work.

16

Yes, I was facing the same issue on my side. I have a tool base web, and was trying to get a subdomain on that so I can practice wordpress and other stuff. but it was not working. Now i will try tommorow.

17

i want to build a subdomain for my birthdaygenerator.org site. but its not. i have added DNS records too.

18

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