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Domain footprint: sipnet.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.
Mail:
mx.etc.tario.ru → SIPNET ru Ltd.
SPF sends via:
subscribe.ru
Separately, 4 organisations whose name resembles “sipnet.ru” — these may be unrelated to the domain above.