Skip to main content
Geo IP Tool
Search
Tools
Learn
129.6.120.0/21
Frederick, Maryland, United States
CIDR Block Overview
CIDR
129.6.120.0/21
Approx. Size
2,048 IPs
Mask
/21
Network & Provider
Organization
US National Institute of Standards & Technology
Autonomous System Number
More information
AS49
Geographic Location
Country
United States
US
Region
Maryland
City
Frederick