The sysadmin's Swiss Army knife
Networking Toolbox is licensed under MIT © Alicia Sykes 2025
Check which NS names require glue records and whether A/AAAA records exist
Multiple NS with full IPv4+IPv6 glue records
Mixed glue status with warning (missing IPv6 on one NS)
Mixed delegation: internal and external nameservers
All external nameservers (NSOne + AWS Route53)
Different TLD (.tv) with external AWS nameservers
Clean 4-nameserver setup with complete glue records