Report for 21608

Name

HCSCNET10 - Blue Cross Blue Shield of Illinois or Blue Cross Blue Shield of Texas, 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.

21608 HCSCNET10 - Blue Cross Blue Shield of Illinois or Blue Cross Blue Shield of Texas, US

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS3356          LEVEL3 - Level 3 Parent, LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
59640 AS21608        ORIGIN  Originate:        256 /24.00  Transit:          0 /0.00  HCSCNET10 - Blue Cross Blue Shield of Illinois or Blue Cross Blue Shield of Texas, 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       %
36256 AS21608       HCSCNET10 - Blue Cross Blue Shield of Illinoi      1      0      0      1      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  208.79.27.0/24       4777 2497 3356 21608   

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

AS21608   1 More Specifics   1 Total Advertisements   HCSCNET10 - Blue Cross Blue Shield of Illinois or Blue Cross Blue Shield of Texas, US
    208.79.27.0/24                208.79.24.0/22

Whois Entry

whois: 402332

IANA has recorded AS21608 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS21608\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:       21608
             ASName:         HCSCNET10
             ASHandle:       AS21608
             RegDate:        2007-04-23
             Updated:        2012-02-24
             Ref:            https://rdap.arin.net/registry/autnum/21608
             
             
             OrgName:        Blue Cross Blue Shield of Illinois or Blue Cross Blue Shield of Texas
             OrgId:          HSCBCBI
             Address:        300 E. Randolph Street
             City:           Chicago
             StateProv:      IL
             PostalCode:     60601
             Country:        US
             RegDate:        2002-03-27
             Updated:        2024-05-17
             Ref:            https://rdap.arin.net/registry/entity/HSCBCBI
             
             
             OrgTechHandle: MSA111-ARIN
             OrgTechName:   Sanner, Michael 
             OrgTechPhone:  +1-214-354-8112 
             OrgTechEmail:  michael_sanner@hcsc.net
             OrgTechRef:    https://rdap.arin.net/registry/entity/MSA111-ARIN
             
             OrgAbuseHandle: MSA111-ARIN
             OrgAbuseName:   Sanner, Michael 
             OrgAbusePhone:  +1-214-354-8112 
             OrgAbuseEmail:  michael_sanner@hcsc.net
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/MSA111-ARIN
             
             OrgTechHandle: BARRK5-ARIN
             OrgTechName:   Barr, Kevin 
             OrgTechPhone:  +1-214-862-5353 
             OrgTechEmail:  kevin_barr@bcbstx.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/BARRK5-ARIN
             
             RAbuseHandle: MSA111-ARIN
             RAbuseName:   Sanner, Michael 
             RAbusePhone:  +1-214-354-8112 
             RAbuseEmail:  michael_sanner@hcsc.net
             RAbuseRef:    https://rdap.arin.net/registry/entity/MSA111-ARIN
             
             RTechHandle: MSA111-ARIN
             RTechName:   Sanner, Michael 
             RTechPhone:  +1-214-354-8112 
             RTechEmail:  michael_sanner@hcsc.net
             RTechRef:    https://rdap.arin.net/registry/entity/MSA111-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.
             #