Data as of Nov 9, 2026
216.21.18.0/24
No anonymizer space · no proxy exits in 30 daysNational Defense University
Network & registry
Origin network
AS5721
US
- Name
- National Defense University
- Type
- Education
- Registered
- Sep 6, 1995
- Domain
- ndu.edu
- Industry
- Colleges, Universities, and Professional Schools
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- Aug 2015
- Current origin since
- Aug 2015 · 11 yr
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 216.
21. 18. 0/ 23 - Netname
- NATIONAL-DEFENSE-UNIVERSITY
- Registrant
- National Defense University
- Organization
- National Defense University (NDU-1)
- Org address
- Ft. McNair, Bldg. 62, Washington, DC, 20319-6000
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-216-21-18-0-1
- Parent
- NET-216-0-0-0-0
- Created
- Jul 8, 2015
- RIR
- ARIN
- Country
- US
- Delegated
- Jul 8, 2015
- Status
- assigned
Report abuse
Abuse contact
- chris.
hartley. ctr@ ndu. edu - Name
- hartley, christopher john
- Phone
- +1-202-685-4716
- Handle
- CJH19-ARIN