How to resolve .co.in & .in domain registration issues?

We got an error while registering .co.in & .in domains.
php_network_getaddresses: getaddrinfo for whois.registry.in failed: Name or service not known

Unregistered domains were incorrectly shown as unavailable for registration.
The issue was identified during WHOIS checks and WHMCS domain availability testing.

Root Cause

The default WHOIS server for .co.in and .in domains in WHMCS is:
whois.registry.in

This server failed to respond properly or was not resolvable.
This meant WHOIS queries failed silently, returning invalid or no data to WHMCS.

Resolution

The fix was applied in the file:
/resources/domains/whois.json
To fix this add following content in this file

[
    {
        "extensions": ".ac.in,.co.in,.org.in,.ernet.in,.gov.in,.net.in,.res.in,.in",
        "uri": "socket://whois.nixiregistry.in",
        "available": "available for registration"
    }
]

whois.nixiregistry.in is the correct WHOIS server for .in and its second-level domains.

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