Certificate
W 117002
ALZENTRA-Sievers Notrufzentrale GmbH & Co. KG
An den Loddenbüschen 77
DE 48155 Münster
+49 251 9279770
0251277784
https://www.alzentra-sievers.de
VdS 3138-1 : 2013-12
Approvals as emergency call and service control centre in accordance with VdS 3138-2
Updated at: 14.02.2026