Report for 4997

Name

AFS-WEST - Zayo Bandwidth, 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.

4997 AFS-WEST, US

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS6461          ZAYO-6461, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
6279  AS4997         ORIGIN  Originate:      23808 /17.46  Transit:          0 /0.00  AFS-WEST, 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       %
 6410 AS4997        AFS-WEST, US                                      26     10      3     19      7  26.92%


  Prefix               AS Path                              Aggregation Suggestion
  208.39.192.0/21      2497 6461 4997       + Announce - aggregate of 208.39.192.0/22 (2497 6461 4997) and 208.39.196.0/22 (2497 6461 4997)
  208.39.192.0/23      2497 6461 4997       - Withdrawn - aggregated with 208.39.194.0/23 (2497 6461 4997)
  208.39.194.0/23      2497 6461 4997       - Withdrawn - aggregated with 208.39.192.0/23 (2497 6461 4997)
  208.39.196.0/22      2497 6461 4997       - Withdrawn - aggregated with 208.39.192.0/22 (2497 6461 4997)
  208.39.199.0/24      2497 6461 4997       - Withdrawn - matching aggregate 208.39.196.0/22 2497 6461 4997
  208.39.218.0/24      2497 6461 4997         
  208.39.222.0/24      2497 6461 4997         
  208.39.224.0/22      2497 6461 4997         
  208.39.228.0/23      2914 6461 4997       + Announce - aggregate of 208.39.228.0/24 (2914 6461 4997) and 208.39.229.0/24 (2914 6461 4997)
  208.39.228.0/24      2914 6461 4997       - Withdrawn - aggregated with 208.39.229.0/24 (2914 6461 4997)
  208.39.229.0/24      2914 6461 4997       - Withdrawn - aggregated with 208.39.228.0/24 (2914 6461 4997)
  208.39.232.0/21      2497 6461 4997         
  208.39.246.0/24      2497 6461 4997         
  208.39.247.0/24      2914 6461 4997         
  208.39.248.0/21      2497 6461 4997       + Announce - aggregate of 208.39.248.0/22 (2497 6461 4997) and 208.39.252.0/22 (2497 6461 4997)
  208.39.248.0/22      2497 6461 4997       - Withdrawn - aggregated with 208.39.252.0/22 (2497 6461 4997)
  208.39.249.0/24      2497 6461 4997       - Withdrawn - matching aggregate 208.39.248.0/22 2497 6461 4997
  208.39.252.0/22      2497 6461 4997       - Withdrawn - aggregated with 208.39.248.0/22 (2497 6461 4997)
  208.39.255.0/24      2497 6461 4997       - Withdrawn - matching aggregate 208.39.252.0/22 2497 6461 4997
  216.222.0.0/20       2497 6461 4997         
  216.222.13.0/24      2914 6461 4997         
  216.222.24.0/22      2497 6461 4997         
  216.222.32.0/23      2497 6461 4997         
  216.222.36.0/22      2497 6461 4997         
  216.222.40.0/21      2497 6461 4997         
  216.222.48.0/20      2497 6461 4997         
  216.222.90.0/23      2497 6461 4997         
  216.222.92.0/23      2497 6461 4997         
  216.222.101.0/24     2914 6461 4997         

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

AS4997   29 More Specifics   29 Total Advertisements   AFS-WEST, US
    66.213.144.0/21               66.213.128.0/19
    66.213.152.0/21               66.213.128.0/19
    66.213.153.0/24               66.213.128.0/19
    208.39.192.0/23               208.39.192.0/18
    208.39.194.0/23               208.39.192.0/18
    208.39.196.0/22               208.39.192.0/18
    208.39.199.0/24               208.39.192.0/18
    208.39.218.0/24               208.39.192.0/18
    208.39.222.0/24               208.39.192.0/18
    208.39.224.0/22               208.39.192.0/18
    208.39.228.0/24               208.39.192.0/18
    208.39.229.0/24               208.39.192.0/18
    208.39.232.0/21               208.39.192.0/18
    208.39.246.0/24               208.39.192.0/18
    208.39.247.0/24               208.39.192.0/18
    208.39.248.0/22               208.39.192.0/18
    208.39.249.0/24               208.39.192.0/18
    208.39.252.0/22               208.39.192.0/18
    208.39.255.0/24               208.39.192.0/18
    216.222.0.0/20                216.222.0.0/17
    216.222.13.0/24               216.222.0.0/17
    216.222.24.0/22               216.222.0.0/17
    216.222.32.0/23               216.222.0.0/17
    216.222.36.0/22               216.222.0.0/17
    216.222.40.0/21               216.222.0.0/17
    216.222.48.0/20               216.222.0.0/17
    216.222.90.0/23               216.222.0.0/17
    216.222.92.0/23               216.222.0.0/17
    216.222.101.0/24              216.222.0.0/17

Whois Entry

whois: 402603

IANA has recorded AS4997 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS4997\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:       4997
             ASName:         AFS-WEST
             ASHandle:       AS4997
             RegDate:        2002-01-04
             Updated:        2017-03-09
             Ref:            https://rdap.arin.net/registry/autnum/4997
             
             
             
             OrgName:        Zayo Bandwidth
             OrgId:          ZAYOB
             Address:        1401 Wynkoop St.
             Address:        #500
             City:           Denver
             StateProv:      CO
             PostalCode:     80202
             Country:        US
             RegDate:        2007-10-12
             Updated:        2024-11-25
             Ref:            https://rdap.arin.net/registry/entity/ZAYOB
             
             
             OrgTechHandle: ZIE-ARIN
             OrgTechName:   Zayo IP Engineering
             OrgTechPhone:  +1-866-236-2824 
             OrgTechEmail:  ipeng@zayo.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/ZIE-ARIN
             
             OrgAbuseHandle: ABUSE5675-ARIN
             OrgAbuseName:   Abuse
             OrgAbusePhone:  +1-866-236-2824 
             OrgAbuseEmail:  abuse@zayo.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE5675-ARIN
             
             OrgNOCHandle: ZIE-ARIN
             OrgNOCName:   Zayo IP Engineering
             OrgNOCPhone:  +1-866-236-2824 
             OrgNOCEmail:  ipeng@zayo.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/ZIE-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.
             #