Report for 40959

Name

HOSTMASTER - City and County of Denver - Denver International Airport, 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.

40959 HOSTMASTER - City and County of Denver - Denver International Airport, US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS6461          ZAYO-6461 - Zayo Bandwidth, US
    AS3356          LEVEL3 - Level 3 Parent, LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
23268 AS40959        ORIGIN  Originate:       2304 /20.83  Transit:          0 /0.00  HOSTMASTER - City and County of Denver - Denver International Airport, 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       %
12570 AS40959       HOSTMASTER - City and County of Denver - Denv      8      4      1      5      3  37.50%


  Prefix               AS Path                              Aggregation Suggestion
  63.156.62.0/24       4777 2516 3356 40959   
  65.120.176.0/24      4777 2516 3356 40959   
  169.133.32.0/23      4777 2516 3356 40959   
  169.133.32.0/24      4777 2497 6461 40959   
  198.202.200.0/22     4777 2516 3356 40959 + Announce - aggregate of 198.202.200.0/23 (4777 2516 3356 40959) and 198.202.202.0/23 (4777 2516 3356 40959)
  198.202.200.0/24     4777 2516 3356 40959 - Withdrawn - aggregated with 198.202.201.0/24 (4777 2516 3356 40959)
  198.202.201.0/24     4777 2516 3356 40959 - Withdrawn - aggregated with 198.202.200.0/24 (4777 2516 3356 40959)
  198.202.202.0/24     4777 2516 3356 40959 - Withdrawn - aggregated with 198.202.203.0/24 (4777 2516 3356 40959)
  198.202.203.0/24     4777 2516 3356 40959 - Withdrawn - aggregated with 198.202.202.0/24 (4777 2516 3356 40959)

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

AS40959   8 More Specifics   8 Total Advertisements   HOSTMASTER - City and County of Denver - Denver International Airport, US
    63.156.62.0/24                63.152.0.0/13
    65.120.176.0/24               65.112.0.0/12
    169.133.32.0/23               169.133.0.0/16
    169.133.32.0/24               169.133.0.0/16
    198.202.200.0/24              198.202.200.0/22
    198.202.201.0/24              198.202.200.0/22
    198.202.202.0/24              198.202.200.0/22
    198.202.203.0/24              198.202.200.0/22

Whois Entry

whois: 402332

IANA has recorded AS40959 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS40959\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:       40959
             ASName:         HOSTMASTER
             ASHandle:       AS40959
             RegDate:        2008-06-04
             Updated:        2012-03-02
             Ref:            https://rdap.arin.net/registry/autnum/40959
             
             
             OrgName:        City and County of Denver -  Denver International Airport
             OrgId:          CCDDIA
             Address:        8500 Pena Blvd
             Address:        AOB - Telecommunications
             City:           Denver
             StateProv:      CO
             PostalCode:     80249-6205
             Country:        US
             RegDate:        1993-10-13
             Updated:        2020-03-20
             Ref:            https://rdap.arin.net/registry/entity/CCDDIA
             
             
             OrgTechHandle: DEN49-ARIN
             OrgTechName:   DEN
             OrgTechPhone:  +1-303-342-4717 
             OrgTechEmail:  j.bonham@flydenver.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/DEN49-ARIN
             
             OrgAbuseHandle: DEN49-ARIN
             OrgAbuseName:   DEN
             OrgAbusePhone:  +1-303-342-4717 
             OrgAbuseEmail:  j.bonham@flydenver.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/DEN49-ARIN
             
             OrgNOCHandle: DEN49-ARIN
             OrgNOCName:   DEN
             OrgNOCPhone:  +1-303-342-4717 
             OrgNOCEmail:  j.bonham@flydenver.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/DEN49-ARIN
             
             RNOCHandle: NOC1280-ARIN
             RNOCName:   NOC
             RNOCPhone:  +1-303-342-2012 
             RNOCEmail:  noc@flydenver.com
             RNOCRef:    https://rdap.arin.net/registry/entity/NOC1280-ARIN
             
             RTechHandle: HOSTM257-ARIN
             RTechName:   Hostmaster
             RTechPhone:  +1-303-342-2012 
             RTechEmail:  hostmaster@flydenver.com
             RTechRef:    https://rdap.arin.net/registry/entity/HOSTM257-ARIN
             
             RAbuseHandle: NETWO282-ARIN
             RAbuseName:   Network Abuse
             RAbusePhone:  +1-303-342-2012 
             RAbuseEmail:  abuse@flydenver.com
             RAbuseRef:    https://rdap.arin.net/registry/entity/NETWO282-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.
             #