AS5721
National Defense University
AS5721 is National Defense University (ndu.edu). It announces 512 IPv4 addresses in 2 prefixes, and 0 IPv6 prefixes.
United States· ARIN· allocated 1995-09-06· Education
512
IPv4 addresses announced
2
IPv4 prefixes
0
IPv6 prefixes
0.00%
of its routes RPKI-valid
512
of its IPv4 geolocated
1
country
Where its space is
The IPv4 it announces that IP Geolocation places, by country. A /24 counts for the AS announcing most of it.
- United States512 · 100.00%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- NDU-NET
- name
- National Defense University
- org
- NDU-1
- org name
- National Defense University
- org address
- Ft. McNair, Bldg. 62, Washington, DC, 20319-6000
- org city
- Washington
- org country
- US
- country
- US
- source
- arin
- created
- 1995-09-06
- updated
- 2015-05-07
- remarks
- http://www.ndu.edu
- abuse
- CJH19-ARIN
- abuse name
- christopher hartley
- abuse email
- chris.hartley.ctr@ndu.edu
- abuse phone
- +1-202-685-4716
- abuse kind
- person
- abuse city
- Washington
- abuse country
- US
- admin name
- christopher hartley
- admin email
- chris.hartley.ctr@ndu.edu
- admin phone
- +1-202-685-4716
- admin kind
- person
- admin city
- Washington
- admin country
- US
- tech
- CJH19-ARIN
- tech name
- christopher hartley
- tech email
- chris.hartley.ctr@ndu.edu
- tech phone
- +1-202-685-4716
- tech kind
- person
- tech city
- Washington
- tech country
- US
- abuse unvalidated since
- 2016-04-23
What the databases see
Addresses each address-keyed database holds in the IPv4 it announces, as a share of that space, with its largest providers. Counts overlap.
- 0.39%
- anyIP, ProxyAZ0.39%
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- 0.59%
- None here
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 216.21.18.0/24 | United States | Not found | 17 | 2026-10-02 |
| 216.21.19.0/24 | United States | Not found | 17 | 2026-10-02 |
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