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Domain footprint: spbstu.ru
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:
178.154.244.120 → RU-YANDEXCLOUD-178158224
Mail:
ksms.spbstu.ru → SPBSPU-NET5
SPF sends via:
_spf.yandex.net · smtp.send-box.ru · spf.unisender.com
Separately, 11 organisations whose name resembles “spbstu.ru” — these may be unrelated to the domain above.