Report for 21781

Name

DALTONSCHOOL - The Dalton School, 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 AS4637) 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.

21781 WCASD-NET - West Chester Area School District

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS20413   CCIU-1 - Chester County Intermediate Unit

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
17663 AS21781  ORIGIN  Originate:        512 /23.00  Transit:          0 /0.00  WCASD-NET - West Chester Area School District

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       %
14001 AS21781 WCASD-NET - West Chester Area School Dis      2      0      0      2      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  204.108.148.0/24     4637 174 20413 21781   
  207.103.112.0/24     4637 174 20413 21781   

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

AS21781   2 More Specifics   2 Total Advertisements   WCASD-NET - West Chester Area School District
    204.108.148.0/24              204.108.128.0/19
    207.103.112.0/24              207.103.0.0/16

Whois Entry

whois: 402603

IANA has recorded AS21781 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS21781\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:       21781
             ASName:         DALTONSCHOOL
             ASHandle:       AS21781
             RegDate:        2012-01-13
             Updated:        2012-01-13
             Ref:            https://rdap.arin.net/registry/autnum/21781
             
             
             OrgName:        The Dalton School
             OrgId:          THEDA-19
             Address:        108 E 89th St.
             City:           New York
             StateProv:      NY
             PostalCode:     10128
             Country:        US
             RegDate:        2007-03-27
             Updated:        2011-09-24
             Ref:            https://rdap.arin.net/registry/entity/THEDA-19
             
             
             OrgAbuseHandle: JNE100-ARIN
             OrgAbuseName:   Neiers, John 
             OrgAbusePhone:  +1-212-423-5489 
             OrgAbuseEmail:  john@dalton.org
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/JNE100-ARIN
             
             OrgTechHandle: JNE100-ARIN
             OrgTechName:   Neiers, John 
             OrgTechPhone:  +1-212-423-5489 
             OrgTechEmail:  john@dalton.org
             OrgTechRef:    https://rdap.arin.net/registry/entity/JNE100-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.
             #