Report for 257

Name

DNIC-AS-00257 - Navy Network Information Center (NNIC), 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.

257 DNIC-AS-00257 - Navy Network Information Center (NNIC), US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS2153          CENIC-2153 - CENIC, US
    AS2152          CENIC-2152 - CENIC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
44095 AS257          ORIGIN  Originate:        896 /22.19  Transit:          0 /0.00  DNIC-AS-00257 - Navy Network Information Center (NNIC), 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       %
20048 AS257         DNIC-AS-00257 - Navy Network Information Cent      5      2      1      4      1  20.00%


  Prefix               AS Path                              Aggregation Suggestion
  204.102.228.0/24     4777 2500 7660 11537 2153 257 + Announce - aggregate of 204.102.228.0/25 (4777 2500 7660 11537 2153 257) and 204.102.228.128/25 (4777 2500 7660 11537 2153 257)
  204.102.228.0/25     4777 2500 7660 11537 2153 257 - Withdrawn - aggregated with 204.102.228.128/25 (4777 2500 7660 11537 2153 257)
  204.102.228.128/25   4777 2500 7660 11537 2153 257 - Withdrawn - aggregated with 204.102.228.0/25 (4777 2500 7660 11537 2153 257)
  204.102.229.0/24     4608 7575 2153 257     
  205.155.65.0/24      4608 7575 2153 257     
  209.129.248.0/25     4777 2500 7660 11537 2153 257   

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

AS257   5 More Specifics   5 Total Advertisements   DNIC-AS-00257 - Navy Network Information Center (NNIC), US
    204.102.228.0/25              204.102.0.0/16
    204.102.228.128/25            204.102.0.0/16
    204.102.229.0/24              204.102.0.0/16
    205.155.65.0/24               205.155.0.0/16
    209.129.248.0/25              209.129.0.0/16

Whois Entry

whois: 402591

IANA has recorded AS257 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS257\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:       257
             ASName:         DNIC-AS-00257
             ASHandle:       AS257
             RegDate:        1988-12-22
             Updated:        2011-07-05
             Ref:            https://rdap.arin.net/registry/autnum/257
             
             
             
             OrgName:        Navy Network Information Center (NNIC)
             OrgId:          NNICN-1
             Address:        2465 GUADALCANAL ROAD
             Address:        BLDG 1265
             City:           VIRGINIA BEACH
             StateProv:      VA
             PostalCode:     23459
             Country:        US
             RegDate:        2006-09-21
             Updated:        2025-03-13
             Ref:            https://rdap.arin.net/registry/entity/NNICN-1
             
             
             OrgAbuseHandle: REGIS10-ARIN
             OrgAbuseName:   Registration
             OrgAbusePhone:  +1-844-347-2457 
             OrgAbuseEmail:  disa.columbus.ns.mbx.arin-registrations@mail.mil
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/REGIS10-ARIN
             
             OrgTechHandle: REGIS10-ARIN
             OrgTechName:   Registration
             OrgTechPhone:  +1-844-347-2457 
             OrgTechEmail:  disa.columbus.ns.mbx.arin-registrations@mail.mil
             OrgTechRef:    https://rdap.arin.net/registry/entity/REGIS10-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.
             #