advice Unable to register few .co domains

[ProDomanico]

Anyone has any idea.. there are some .co names which I am not able to register
WHOIS information shows they are available. NO one registered them

They are four letter domains

 

[Hypersot]

If they have recently dropped, sometimes it happens
It's been a few times where I had to wait 1-2 days until I could reg a recently dropped .co domain which showed as available in my whois checks

no idea why it happens tbh (your case ofc might be something else entirely)