Siemens-Industry-Software-Inc. Mentor Graphics Corporation AS13541
134.86.0.0 - 134.86.255.255
137.202.0.0 - 137.202.255.255
139.181.0.0 - 139.181.3.255
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192.94.32.0 - 192.94.32.255
192.94.36.0 - 192.94.36.255
192.94.38.0 - 192.94.39.255