Report for 21965

Name

HIGHMARK - Highmark 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 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.

21965 HIGHMARK - Highmark Inc, US

  Adjacency:     7  Upstream:     6  Downstream:     1
  Upstream Adjacent AS list
    AS46887         CROWNCASTLE-AS46887 - Crown Castle Fiber LLC, US
    AS15830         EQUINIX, NL
    AS6461          ZAYO-6461 - Zayo Bandwidth, US
    AS7018          ATT-INTERNET4 - AT&T Enterprises, LLC, US
    AS3356          LEVEL3 - Level 3 Parent, LLC, US
    AS7016          CCCH-3 - Comcast Cable Communications, LLC, US
  Downstream Adjacent AS list
    AS22255         ALLEGHENYHEALTHNETWORK - Allegheny Health Network, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
14426 AS21965        ORG+TRN Originate:       5632 /19.54  Transit:      26112 /17.33 HIGHMARK - Highmark Inc, 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       %
 7255 AS21965       HIGHMARK - Highmark Inc, US                       22      8      2     16      6  27.27%


  Prefix               AS Path                              Aggregation Suggestion
  157.154.3.0/24       4608 7575 6461 21965   
  157.154.4.0/22       4608 7575 6461 21965 + Announce - aggregate of 157.154.4.0/23 (4608 7575 6461 21965) and 157.154.6.0/23 (4608 7575 6461 21965)
  157.154.4.0/24       4608 7575 6461 21965 - Withdrawn - aggregated with 157.154.5.0/24 (4608 7575 6461 21965)
  157.154.5.0/24       4608 7575 6461 21965 - Withdrawn - aggregated with 157.154.4.0/24 (4608 7575 6461 21965)
  157.154.6.0/24       4608 7575 6461 21965 - Withdrawn - aggregated with 157.154.7.0/24 (4608 7575 6461 21965)
  157.154.7.0/24       4608 7575 6461 21965 - Withdrawn - aggregated with 157.154.6.0/24 (4608 7575 6461 21965)
  157.154.8.0/24       4608 7575 6461 21965   
  157.154.11.0/24      4777 2497 3356 21965   
  157.154.14.0/24      4608 7575 6461 21965   
  157.154.20.0/24      4608 7575 6461 21965   
  167.164.3.0/24       4777 2497 3356 21965   
  167.164.4.0/22       4777 2497 3356 21965 + Announce - aggregate of 167.164.4.0/23 (4777 2497 3356 21965) and 167.164.6.0/23 (4777 2497 3356 21965)
  167.164.4.0/24       4777 2497 3356 21965 - Withdrawn - aggregated with 167.164.5.0/24 (4777 2497 3356 21965)
  167.164.5.0/24       4777 2497 3356 21965 - Withdrawn - aggregated with 167.164.4.0/24 (4777 2497 3356 21965)
  167.164.6.0/24       4777 2497 3356 21965 - Withdrawn - aggregated with 167.164.7.0/24 (4777 2497 3356 21965)
  167.164.7.0/24       4777 2497 3356 21965 - Withdrawn - aggregated with 167.164.6.0/24 (4777 2497 3356 21965)
  167.164.8.0/24       4777 2497 3356 21965   
  167.164.11.0/24      4777 2497 3356 21965   
  167.164.14.0/24      4777 2497 3356 21965   
  167.164.20.0/24      4777 2497 3356 21965   
  192.152.123.0/24     4777 2516 7922 7016 21965   
  199.190.160.0/24     4608 7575 2914 15830 21965   
  199.190.163.0/24     4777 2497 6461 21965   
  199.190.164.0/24     4777 2516 3356 21965   

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

AS21965   19 More Specifics   22 Total Advertisements   HIGHMARK - Highmark Inc, US
    157.154.3.0/24                157.154.0.0/16
    157.154.4.0/24                157.154.0.0/16
    157.154.5.0/24                157.154.0.0/16
    157.154.6.0/24                157.154.0.0/16
    157.154.7.0/24                157.154.0.0/16
    157.154.8.0/24                157.154.0.0/16
    157.154.11.0/24               157.154.0.0/16
    157.154.14.0/24               157.154.0.0/16
    157.154.20.0/24               157.154.0.0/16
    167.164.3.0/24                167.164.0.0/16
    167.164.4.0/24                167.164.0.0/16
    167.164.5.0/24                167.164.0.0/16
    167.164.6.0/24                167.164.0.0/16
    167.164.7.0/24                167.164.0.0/16
    167.164.8.0/24                167.164.0.0/16
    167.164.11.0/24               167.164.0.0/16
    167.164.14.0/24               167.164.0.0/16
    167.164.20.0/24               167.164.0.0/16
    199.190.160.0/24              199.190.160.0/23

Whois Entry

whois: 402332

IANA has recorded AS21965 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS21965\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:       21965
             ASName:         HIGHMARK
             ASHandle:       AS21965
             RegDate:        2001-07-19
             Updated:        2014-10-27
             Ref:            https://rdap.arin.net/registry/autnum/21965
             
             
             OrgName:        Highmark Inc
             OrgId:          HIGHM-5
             Address:        120 Fifth Avenue Place
             City:           Pittsburgh
             StateProv:      PA
             PostalCode:     15222
             Country:        US
             RegDate:        2012-08-29
             Updated:        2012-08-29
             Ref:            https://rdap.arin.net/registry/entity/HIGHM-5
             
             
             OrgTechHandle: WWWAD-ARIN
             OrgTechName:   www-admin
             OrgTechPhone:  +1-717-302-5275 
             OrgTechEmail:  arinpoc@highmark.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/WWWAD-ARIN
             
             OrgNOCHandle: WWWAD-ARIN
             OrgNOCName:   www-admin
             OrgNOCPhone:  +1-717-302-5275 
             OrgNOCEmail:  arinpoc@highmark.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/WWWAD-ARIN
             
             OrgAbuseHandle: WWWAD-ARIN
             OrgAbuseName:   www-admin
             OrgAbusePhone:  +1-717-302-5275 
             OrgAbuseEmail:  arinpoc@highmark.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/WWWAD-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.
             #