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Domain footprint: ptb.de

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: 192.53.103.121 → Physikalisch-Technische Bundesanstalt
Mail: mx1.berlin.ptb.de → PTB-CHB · mx1.bs.ptb.de → Physikalisch-Technische Bundesanstalt
SPF sends via: spf.smtp.net