Why is my wildcard record is not working?

[sodonsolution]

I created wildcard record few months ago. "*.st.sodonsolution.org", At this time it was working.
for example:

nslookup a.st.sodonsolution.org
nslookup a.portal3.st.sodonsolution.org
nslookup portal4.st.sodonsolution.org
nslookup a.portal4.st.sodonsolution.org

Now some of domain lookup requests failing. Why it is happening here? 

[PL281]

@sodonsolution 

When I first tested this I was seeing the same thing - then it just started working - very odd - I was able to get to your test page

[sodonsolution]

Still not working. Double checked with official DNS. 

nslookup a.portal4.st.sodonsolution.org - ns58.domaincontrol.com
nslookup b.portal4.st.sodonsolution.org - ns58.domaincontrol.com
dig b.portal4.st.sodonsolution.org @ns57.domaincontrol.com

Can you tell me what is wrong with my record? 
It seems something happening in godaddy DNS servers.

[PL281]

@sodonsolution 

I just try a.portal5.st.sodonsolution.org

huh.st.sodonsolution.org

and a couple of others and they worked just fine - I just typed them into the browser I didn't try to do a lookup on them

I don't know if doing the lookup is somehow blocking them from being used.

[sodonsolution]

Previously we used to use *.staging.sodonsolution.org but stopped working for unknown reason. And we changed it to *.st.sodonsolution.org. Stopped working again. We can't change every time godaddy blocks our domain records. We need to know what is reason.

[PL281]

@sodonsolution 

I've never had this issue before and I use wild card on a number of site - granted I don't do it off a subdomain - I have *.domain.com vs *.something.domain.com but that shouldn't matter

I am assuming in the GoDaddy DNS for host you have *.st as the name and points to the IP address

What's also odd - is that portal4 seems to be having an issue / not responding but 1-9 otherwise were working just fine / as expected

[sodonsolution]

Here is screenshot of DNS record. I think every sub domain of st.sodonsolution.org should work. Is is correct?

And here is screenshot that nslookup has invalid answer.

I assuming godaddy DNS malfunctioning or someone at godaddy is trolling me. 

[PL281]

@sodonsolution 

Yes that is correct - there is something with the portal4 entry

https://dnschecker.org/#A/a.portal4.st.sodonsolution.org - You see nothing is found 

https://dnschecker.org/#A/a.portal3.st.sodonsolution.org - Works fine

All the other records are fine - it is something specific with portal4 - which is really odd

You only pasted the one DNS record - I'm assuming you don't have a specific record for portal4 

https://dnschecker.org/#A/portal4.a.st.sodonsolution.org - this also works.... so it is something specifically with *.portal4.st.sodonsolutions.org