Report for 27506

Name

CROWNCASTLE-AS27506 - Crown Castle Fiber LLC, 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.

27506 CROWNCASTLE-AS27506 - Crown Castle Fiber LLC, US

  Adjacency:     2  Upstream:     1  Downstream:     1
  Upstream Adjacent AS list
    AS46887         CROWNCASTLE-AS46887 - Crown Castle Fiber LLC, US
  Downstream Adjacent AS list
    AS23004         VIEWTRADE - VIEWTRADE SECURITIES, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
4294  AS27506        ORG+TRN Originate:      51200 /16.36  Transit:        256 /24.00 CROWNCASTLE-AS27506 - Crown Castle Fiber LLC, 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       %
 6506 AS27506       CROWNCASTLE-AS27506 - Crown Castle Fiber LLC,     17      9      2     10      7  41.18%


  Prefix               AS Path                              Aggregation Suggestion
  64.20.160.0/19       4608 7575 1299 46887 27506   
  64.20.160.0/20       4608 7575 1299 46887 27506 - Withdrawn - matching aggregate 64.20.160.0/19 4608 7575 1299 46887 27506
  64.20.168.0/24       4777 2516 1299 46887 27506   
  64.20.175.0/24       4777 2516 1299 46887 27506   
  64.20.176.0/20       4608 7575 1299 46887 27506 - Withdrawn - matching aggregate 64.20.160.0/19 4608 7575 1299 46887 27506
  64.20.177.0/24       4777 2516 1299 46887 27506   
  64.20.178.0/23       4777 2516 1299 46887 27506 + Announce - aggregate of 64.20.178.0/24 (4777 2516 1299 46887 27506) and 64.20.179.0/24 (4777 2516 1299 46887 27506)
  64.20.178.0/24       4777 2516 1299 46887 27506 - Withdrawn - aggregated with 64.20.179.0/24 (4777 2516 1299 46887 27506)
  64.20.179.0/24       4777 2516 1299 46887 27506 - Withdrawn - aggregated with 64.20.178.0/24 (4777 2516 1299 46887 27506)
  64.20.180.0/24       4777 2516 1299 46887 27506   
  64.20.186.0/23       4777 2516 1299 46887 27506 + Announce - aggregate of 64.20.186.0/24 (4777 2516 1299 46887 27506) and 64.20.187.0/24 (4777 2516 1299 46887 27506)
  64.20.186.0/24       4777 2516 1299 46887 27506 - Withdrawn - aggregated with 64.20.187.0/24 (4777 2516 1299 46887 27506)
  64.20.187.0/24       4777 2516 1299 46887 27506 - Withdrawn - aggregated with 64.20.186.0/24 (4777 2516 1299 46887 27506)
  69.64.192.0/19       4608 7575 1299 46887 27506   
  69.64.192.0/20       4608 7575 1299 46887 27506 - Withdrawn - matching aggregate 69.64.192.0/19 4608 7575 1299 46887 27506
  76.8.64.0/20         4608 7575 1299 46887 27506   
  209.148.32.0/19      4608 7575 1299 46887 27506   
  209.148.32.0/20      4608 7575 1299 46887 27506 - Withdrawn - matching aggregate 209.148.32.0/19 4608 7575 1299 46887 27506
  209.148.48.0/20      4608 7575 1299 46887 27506 - Withdrawn - matching aggregate 209.148.32.0/19 4608 7575 1299 46887 27506

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

AS27506   14 More Specifics   17 Total Advertisements   CROWNCASTLE-AS27506 - Crown Castle Fiber LLC, US
    64.20.160.0/20                64.20.160.0/19
    64.20.168.0/24                64.20.160.0/19
    64.20.175.0/24                64.20.160.0/19
    64.20.176.0/20                64.20.160.0/19
    64.20.177.0/24                64.20.160.0/19
    64.20.178.0/24                64.20.160.0/19
    64.20.179.0/24                64.20.160.0/19
    64.20.180.0/24                64.20.160.0/19
    64.20.186.0/24                64.20.160.0/19
    64.20.187.0/24                64.20.160.0/19
    69.64.192.0/20                69.64.192.0/19
    76.8.64.0/20                  76.8.64.0/19
    209.148.32.0/20               209.148.32.0/19
    209.148.48.0/20               209.148.32.0/19

Whois Entry

whois: 402603

IANA has recorded AS27506 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS27506\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:       27506
             ASName:         ZAYO-CCF-AS27506
             ASHandle:       AS27506
             RegDate:        2003-03-19
             Updated:        2026-06-01
             Ref:            https://rdap.arin.net/registry/autnum/27506
             
             
             
             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.
             #