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Domain footprint: ntu.edu.sg
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:
104.16.4.14 → Cloudflare, Inc.
Mail:
ntu.in.tmes.trendmicro.com → Amazon Web Services, Inc.
SPF sends via:
spfext.ntu.edu.sg · spf.protection.outlook.com · outboundmail.blackbaud.net · 7571598.spf05.hubspotemail.net · sendgrid.net · ap.rp.oracleemaildelivery.com
Separately, 1 organisation whose name resembles “ntu.edu.sg” — these may be unrelated to the domain above.