Report for 5721

Name

NDU-NET - National Defense University, US

AS Adjacency Report

In the context of this report "Upstream" indicates that there is an adjacent AS that lines between the BGP table collection point (in this case at AS2.0) and the specified AS. Similarly, "Downstream" refers to an adjacent AS that lies beyond the specified AS. This upstream / downstream categorisation is strictly a description relative topology, and should not be confused with provider / customer / peer inter-AS relationships.

5721 NDU-NET - National Defense University, US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS22773         ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US
    AS33657         CMCS - Comcast Cable Communications, LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
47801 AS5721         ORIGIN  Originate:        512 /23.00  Transit:          0 /0.00  NDU-NET - National Defense University, US

Aggregation Suggestions

        Filter: Aggregates, Specifics

This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.

 Rank AS            AS Name                                      Current  Wthdw  Aggte  Annce Redctn       %
30746 AS5721        NDU-NET - National Defense University, US          2      0      0      2      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  216.21.18.0/24       4777 2516 7922 33657 5721   
  216.21.19.0/24       4777 2497 1299 22773 5721   

Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.

AS5721   2 More Specifics   2 Total Advertisements   NDU-NET - National Defense University, US
    216.21.18.0/24                216.21.18.0/23
    216.21.19.0/24                216.21.18.0/23

Whois Entry

whois: 402332

IANA has recorded AS5721 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS5721\n             
             #
             # ARIN WHOIS data and services are subject to the Terms of Use
             # available at: https://www.arin.net/resources/registry/whois/tou/
             #
             # If you see inaccuracies in the results, please report at
             # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
             #
             # Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
             #
             
             
             ASNumber:       5721
             ASName:         NDU-NET
             ASHandle:       AS5721
             RegDate:        1995-09-06
             Updated:        2015-05-07
             Comment:        http://www.ndu.edu
             Ref:            https://rdap.arin.net/registry/autnum/5721
             
             
             OrgName:        National Defense University
             OrgId:          NDU-1
             Address:        Ft. McNair, Bldg. 62
             City:           Washington
             StateProv:      DC
             PostalCode:     20319-6000
             Country:        US
             RegDate:        1994-10-04
             Updated:        2015-05-07
             Ref:            https://rdap.arin.net/registry/entity/NDU-1
             
             
             OrgTechHandle: CJH19-ARIN
             OrgTechName:   hartley, christopher john
             OrgTechPhone:  +1-202-685-4716 
             OrgTechEmail:  chris.hartley.ctr@ndu.edu
             OrgTechRef:    https://rdap.arin.net/registry/entity/CJH19-ARIN
             
             OrgAbuseHandle: CJH19-ARIN
             OrgAbuseName:   hartley, christopher john
             OrgAbusePhone:  +1-202-685-4716 
             OrgAbuseEmail:  chris.hartley.ctr@ndu.edu
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/CJH19-ARIN
             
             RTechHandle: CJH19-ARIN
             RTechName:   hartley, christopher john
             RTechPhone:  +1-202-685-4716 
             RTechEmail:  chris.hartley.ctr@ndu.edu
             RTechRef:    https://rdap.arin.net/registry/entity/CJH19-ARIN
             
             RAbuseHandle: CJH19-ARIN
             RAbuseName:   hartley, christopher john
             RAbusePhone:  +1-202-685-4716 
             RAbuseEmail:  chris.hartley.ctr@ndu.edu
             RAbuseRef:    https://rdap.arin.net/registry/entity/CJH19-ARIN
             
             RNOCHandle: CJH19-ARIN
             RNOCName:   hartley, christopher john
             RNOCPhone:  +1-202-685-4716 
             RNOCEmail:  chris.hartley.ctr@ndu.edu
             RNOCRef:    https://rdap.arin.net/registry/entity/CJH19-ARIN
             
             
             #
             # ARIN WHOIS data and services are subject to the Terms of Use
             # available at: https://www.arin.net/resources/registry/whois/tou/
             #
             # If you see inaccuracies in the results, please report at
             # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
             #
             # Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
             #