Report for 21511

Name

NCSBN - NCSBN, Inc., 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 AS6447) 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.

21511 NCSBN, US

  Adjacency:     3  Upstream:     3  Downstream:     0
  Upstream Adjacent AS list
    AS701           UUNET, US
    AS174           COGENT-174, US
    AS7018          ATT-INTERNET4, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
59919 AS21511        ORIGIN  Originate:        256 /24.00  Transit:          0 /0.00  NCSBN, 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       %
36033 AS21511       NCSBN, US                                          1      0      0      1      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  65.248.198.0/24      7018 21511 21511       

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

AS21511   1 More Specifics   1 Total Advertisements   NCSBN, US
    65.248.198.0/24               65.248.0.0/14

Whois Entry

whois: 402603

IANA has recorded AS21511 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS21511\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:       21511
             ASName:         NCSBN
             ASHandle:       AS21511
             RegDate:        2001-05-14
             Updated:        2013-07-12
             Ref:            https://rdap.arin.net/registry/autnum/21511
             
             
             OrgName:        NCSBN, Inc.
             OrgId:          NCSBNI
             Address:        111 East Wacker Drive
             Address:        Suite 2900
             City:           Chicago
             StateProv:      IL
             PostalCode:     60601
             Country:        US
             RegDate:        2001-05-14
             Updated:        2013-07-12
             Ref:            https://rdap.arin.net/registry/entity/NCSBNI
             
             
             OrgNOCHandle: NETWO5023-ARIN
             OrgNOCName:   Network Admins
             OrgNOCPhone:  +1-312-525-3600 
             OrgNOCEmail:  netadmin@ncsbn.org
             OrgNOCRef:    https://rdap.arin.net/registry/entity/NETWO5023-ARIN
             
             OrgTechHandle: NETWO5023-ARIN
             OrgTechName:   Network Admins
             OrgTechPhone:  +1-312-525-3600 
             OrgTechEmail:  netadmin@ncsbn.org
             OrgTechRef:    https://rdap.arin.net/registry/entity/NETWO5023-ARIN
             
             OrgAbuseHandle: NETWO5023-ARIN
             OrgAbuseName:   Network Admins
             OrgAbusePhone:  +1-312-525-3600 
             OrgAbuseEmail:  netadmin@ncsbn.org
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/NETWO5023-ARIN
             
             RNOCHandle: NETWO5023-ARIN
             RNOCName:   Network Admins
             RNOCPhone:  +1-312-525-3600 
             RNOCEmail:  netadmin@ncsbn.org
             RNOCRef:    https://rdap.arin.net/registry/entity/NETWO5023-ARIN
             
             RTechHandle: NETWO5023-ARIN
             RTechName:   Network Admins
             RTechPhone:  +1-312-525-3600 
             RTechEmail:  netadmin@ncsbn.org
             RTechRef:    https://rdap.arin.net/registry/entity/NETWO5023-ARIN
             
             RAbuseHandle: NETWO5023-ARIN
             RAbuseName:   Network Admins
             RAbusePhone:  +1-312-525-3600 
             RAbuseEmail:  netadmin@ncsbn.org
             RAbuseRef:    https://rdap.arin.net/registry/entity/NETWO5023-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.
             #