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137.51.0.0/16
RIR
arin
Country
US
Status
allocated
Allocation date
1991-03-08
Ownership history
Org
Handle
First seen
Last seen
Northrop Grumman Corp.
NET-137-51-0-0-1
2026-07-16 19:36:14.245000
2026-09-02 20:03:22.312000