Deliberately segregated enterprise network footprint
Deutsche Bank AG very likely operates a mature, deliberately segregated enterprise network footprint, evidenced by three distinct DB-owned ASNs (AS8373 EU, AS15769 London, AS2824 NA), Proofpoint-fronted DMARC strict-reject, and EV-certificated apex TLS; the alternative explanation — incidental network sprawl — is inconsistent with the consistent dns.admin@db.com POC and Reiner Schaefer admin attribution across all three RIRs.
Three DB-owned ASNs (AS8373 EU/RIPE, AS15769 London/RIPE, AS2824 NA/ARIN) all share a single technical-contact pattern (dns.admin@db.com + Reiner Schaefer, ent_037) which is very likely intentional geographic separation rather than accidental sprawl. DMARC enforces p=reject; sp=reject; adkim=s via Proofpoint (ent_050), and the apex TLS cert is DigiCert EV with full O=DEUTSCHE BANK AG subject — collectively a posture inconsistent with the "incidental sprawl" hypothesis.