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Domain footprint: nren.ac.za
Resolved live just now — where this domain's services actually run, with each address attributed by OrgIndex. A DNS observation, not registry data: many organisations run entirely on providers' networks and hold no IP space of their own.
Web:
155.232.92.21 → Tertiary Education and Research Network of South Africa ·
2001:4200:0:c::21 → Tertiary Education and Research Network of South Africa
Mail:
mx.tenet.ac.za → AF-TENET-196-21-99-0
No organisation is registered under the name "nren.ac.za"
The addresses above are where it actually runs — resolved live and attributed to the operator that registered each range. That is the answer for a domain; a name match here would only add something if a company were registered under this name too.
Sites hosted on a provider (OVH, Cloudflare, AWS and the like) show that provider, because the address space is registered to them rather than to the site's owner.