Report for 26101

Name

YAHOO-BF1 - Yahoo Holdings 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 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.

26101 YAHOO-BF1, US

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS10310         YAHOO-1, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
1743  AS26101        ORIGIN  Originate:     137984 /14.93  Transit:          0 /0.00  YAHOO-BF1, 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       %
 1337 AS26101       YAHOO-BF1, US                                     76     49      4     31     45  59.21%


  Prefix               AS Path                              Aggregation Suggestion
  63.250.196.0/22      293 10310 26101        
  63.250.200.0/21      293 10310 26101        
  66.196.80.0/21       293 10310 26101        
  66.196.88.0/23       293 10310 26101        
  66.196.104.0/21      293 10310 26101        
  66.196.109.0/24      293 10310 26101      - Withdrawn - matching aggregate 66.196.104.0/21 293 10310 26101
  66.196.112.0/21      293 10310 26101        
  66.218.80.0/20       293 10310 26101        
  66.218.84.0/24       293 10310 26101      - Withdrawn - matching aggregate 66.218.80.0/20 293 10310 26101
  66.218.85.0/24       293 10310 26101      - Withdrawn - matching aggregate 66.218.80.0/20 293 10310 26101
  66.218.86.0/24       293 10310 26101      - Withdrawn - matching aggregate 66.218.80.0/20 293 10310 26101
  66.218.87.0/24       293 10310 26101      - Withdrawn - matching aggregate 66.218.80.0/20 293 10310 26101
  67.195.176.0/20      293 10310 26101        
  67.195.192.0/19      293 10310 26101        
  67.195.204.0/22      293 10310 26101      - Withdrawn - matching aggregate 67.195.192.0/19 293 10310 26101
  67.195.204.0/24      293 10310 26101      - Withdrawn - matching aggregate 67.195.192.0/19 293 10310 26101
  67.195.205.0/24      293 10310 26101      - Withdrawn - matching aggregate 67.195.192.0/19 293 10310 26101
  67.195.216.0/22      6939 10310 26101       
  67.195.220.0/24      293 10310 26101      - Withdrawn - matching aggregate 67.195.192.0/19 293 10310 26101
  67.195.221.0/24      293 10310 26101      - Withdrawn - matching aggregate 67.195.192.0/19 293 10310 26101
  68.142.216.0/21      6939 10310 26101       
  68.142.224.0/21      293 10310 26101        
  68.142.232.0/22      293 10310 26101        
  68.142.236.0/22      6939 10310 26101       
  69.147.72.0/21       293 10310 26101        
  69.147.112.0/20      293 10310 26101        
  69.147.120.0/21      6939 10310 26101       
  72.30.0.0/18         293 10310 26101      + Announce - aggregate of 72.30.0.0/19 (293 10310 26101) and 72.30.32.0/19 (293 10310 26101)
  72.30.0.0/19         293 10310 26101      - Withdrawn - aggregated with 72.30.32.0/19 (293 10310 26101)
  72.30.2.0/24         293 10310 26101      - Withdrawn - matching aggregate 72.30.0.0/19 293 10310 26101
  72.30.3.0/24         293 10310 26101      - Withdrawn - matching aggregate 72.30.0.0/19 293 10310 26101
  72.30.22.0/24        293 10310 26101      - Withdrawn - matching aggregate 72.30.0.0/19 293 10310 26101
  72.30.32.0/19        293 10310 26101      - Withdrawn - aggregated with 72.30.0.0/19 (293 10310 26101)
  72.30.35.0/24        293 10310 26101      - Withdrawn - matching aggregate 72.30.32.0/19 293 10310 26101
  72.30.60.0/22        293 10310 26101      - Withdrawn - matching aggregate 72.30.32.0/19 293 10310 26101
  72.30.60.0/23        293 10310 26101      - Withdrawn - matching aggregate 72.30.32.0/19 293 10310 26101
  72.30.62.0/23        293 10310 26101      - Withdrawn - matching aggregate 72.30.32.0/19 293 10310 26101
  72.30.192.0/20       293 10310 26101        
  72.30.205.0/24       293 10310 26101      - Withdrawn - matching aggregate 72.30.192.0/20 293 10310 26101
  74.6.48.0/22         293 10310 26101        
  74.6.96.0/19         293 10310 26101        
  74.6.96.0/24         293 10310 26101      - Withdrawn - matching aggregate 74.6.96.0/19 293 10310 26101
  74.6.106.0/24        293 10310 26101      - Withdrawn - matching aggregate 74.6.96.0/19 293 10310 26101
  74.6.128.0/20        293 10310 26101      + Announce - aggregate of 74.6.128.0/21 (293 10310 26101) and 74.6.136.0/21 (293 10310 26101)
  74.6.128.0/21        293 10310 26101      - Withdrawn - aggregated with 74.6.136.0/21 (293 10310 26101)
  74.6.136.0/22        293 10310 26101      - Withdrawn - aggregated with 74.6.140.0/22 (293 10310 26101)
  74.6.136.0/24        293 10310 26101      - Withdrawn - matching aggregate 74.6.136.0/22 293 10310 26101
  74.6.137.0/24        293 10310 26101      - Withdrawn - matching aggregate 74.6.136.0/22 293 10310 26101
  74.6.138.0/24        293 10310 26101      - Withdrawn - matching aggregate 74.6.136.0/22 293 10310 26101
  74.6.139.0/24        293 10310 26101      - Withdrawn - matching aggregate 74.6.136.0/22 293 10310 26101
  74.6.140.0/22        293 10310 26101      - Withdrawn - aggregated with 74.6.136.0/22 (293 10310 26101)
  74.6.140.0/24        293 10310 26101      - Withdrawn - matching aggregate 74.6.140.0/22 293 10310 26101
  74.6.141.0/24        293 10310 26101      - Withdrawn - matching aggregate 74.6.140.0/22 293 10310 26101
  74.6.142.0/24        293 10310 26101      - Withdrawn - matching aggregate 74.6.140.0/22 293 10310 26101
  74.6.143.0/24        293 10310 26101      - Withdrawn - matching aggregate 74.6.140.0/22 293 10310 26101
  74.6.144.0/21        293 10310 26101      + Announce - aggregate of 74.6.144.0/22 (293 10310 26101) and 74.6.148.0/22 (293 10310 26101)
  74.6.144.0/22        293 10310 26101      - Withdrawn - aggregated with 74.6.148.0/22 (293 10310 26101)
  74.6.144.0/24        293 10310 26101      - Withdrawn - matching aggregate 74.6.144.0/22 293 10310 26101
  74.6.145.0/24        293 10310 26101      - Withdrawn - matching aggregate 74.6.144.0/22 293 10310 26101
  74.6.146.0/24        293 10310 26101      - Withdrawn - matching aggregate 74.6.144.0/22 293 10310 26101
  74.6.147.0/24        293 10310 26101      - Withdrawn - matching aggregate 74.6.144.0/22 293 10310 26101
  74.6.148.0/22        293 10310 26101      - Withdrawn - aggregated with 74.6.144.0/22 (293 10310 26101)
  74.6.248.0/21        293 10310 26101        
  98.137.192.0/21      293 10310 26101        
  98.139.8.0/22        293 10310 26101        
  98.139.16.0/20       293 10310 26101      + Announce - aggregate of 98.139.16.0/21 (293 10310 26101) and 98.139.24.0/21 (293 10310 26101)
  98.139.16.0/21       293 10310 26101      - Withdrawn - aggregated with 98.139.24.0/21 (293 10310 26101)
  98.139.16.0/24       293 10310 26101      - Withdrawn - matching aggregate 98.139.16.0/21 293 10310 26101
  98.139.17.0/24       293 10310 26101      - Withdrawn - matching aggregate 98.139.16.0/21 293 10310 26101
  98.139.21.0/24       293 10310 26101      - Withdrawn - matching aggregate 98.139.16.0/21 293 10310 26101
  98.139.24.0/21       293 10310 26101      - Withdrawn - aggregated with 98.139.16.0/21 (293 10310 26101)
  98.139.32.0/20       293 10310 26101        
  98.139.44.0/23       293 10310 26101      - Withdrawn - matching aggregate 98.139.32.0/20 293 10310 26101
  98.139.124.0/22      293 10310 26101        
  98.139.128.0/17      293 10310 26101        
  98.139.133.0/24      293 10310 26101      - Withdrawn - matching aggregate 98.139.128.0/17 293 10310 26101
  98.139.155.0/24      293 10310 26101      - Withdrawn - matching aggregate 98.139.128.0/17 293 10310 26101
  98.139.199.0/24      293 10310 26101      - Withdrawn - matching aggregate 98.139.128.0/17 293 10310 26101
  98.139.225.0/24      293 10310 26101      - Withdrawn - matching aggregate 98.139.128.0/17 293 10310 26101
  209.73.180.0/22      293 10310 26101        

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

AS26101   85 More Specifics   85 Total Advertisements   YAHOO-BF1, US
    63.250.196.0/22               63.250.192.0/19
    63.250.200.0/21               63.250.192.0/19
    66.196.80.0/21                66.196.64.0/18
    66.196.104.0/21               66.196.64.0/18
    66.196.109.0/24               66.196.64.0/18
    66.218.80.0/20                66.218.64.0/19
    66.218.84.0/24                66.218.64.0/19
    66.218.85.0/24                66.218.64.0/19
    66.218.86.0/24                66.218.64.0/19
    66.218.87.0/24                66.218.64.0/19
    66.218.92.0/22                66.218.64.0/19
    67.195.176.0/20               67.195.0.0/16
    67.195.192.0/19               67.195.0.0/16
    67.195.204.0/22               67.195.0.0/16
    67.195.204.0/24               67.195.0.0/16
    67.195.205.0/24               67.195.0.0/16
    67.195.216.0/22               67.195.0.0/16
    67.195.220.0/24               67.195.0.0/16
    67.195.221.0/24               67.195.0.0/16
    68.142.216.0/21               68.142.192.0/18
    68.142.224.0/21               68.142.192.0/18
    68.142.232.0/22               68.142.192.0/18
    68.142.236.0/22               68.142.192.0/18
    69.147.72.0/21                69.147.64.0/18
    69.147.112.0/20               69.147.64.0/18
    69.147.120.0/21               69.147.64.0/18
    72.30.0.0/19                  72.30.0.0/16
    72.30.2.0/24                  72.30.0.0/16
    72.30.3.0/24                  72.30.0.0/16
    72.30.22.0/24                 72.30.0.0/16
    72.30.32.0/19                 72.30.0.0/16
    72.30.35.0/24                 72.30.0.0/16
    72.30.60.0/22                 72.30.0.0/16
    72.30.60.0/23                 72.30.0.0/16
    72.30.62.0/23                 72.30.0.0/16
    72.30.192.0/20                72.30.0.0/16
    72.30.205.0/24                72.30.0.0/16
    72.30.208.0/22                72.30.0.0/16
    74.6.48.0/22                  74.6.0.0/16
    74.6.96.0/19                  74.6.0.0/16
    74.6.96.0/24                  74.6.0.0/16
    74.6.105.0/24                 74.6.0.0/16
    74.6.106.0/24                 74.6.0.0/16
    74.6.128.0/21                 74.6.0.0/16
    74.6.136.0/22                 74.6.0.0/16
    74.6.136.0/24                 74.6.0.0/16
    74.6.137.0/24                 74.6.0.0/16
    74.6.138.0/24                 74.6.0.0/16
    74.6.139.0/24                 74.6.0.0/16
    74.6.140.0/22                 74.6.0.0/16
    74.6.140.0/24                 74.6.0.0/16
    74.6.141.0/24                 74.6.0.0/16
    74.6.142.0/24                 74.6.0.0/16
    74.6.143.0/24                 74.6.0.0/16
    74.6.144.0/22                 74.6.0.0/16
    74.6.144.0/24                 74.6.0.0/16
    74.6.145.0/24                 74.6.0.0/16
    74.6.146.0/24                 74.6.0.0/16
    74.6.147.0/24                 74.6.0.0/16
    74.6.148.0/22                 74.6.0.0/16
    74.6.248.0/21                 74.6.0.0/16
    76.13.0.0/17                  76.13.0.0/16
    76.13.0.0/24                  76.13.0.0/16
    76.13.24.0/21                 76.13.0.0/16
    76.13.28.0/24                 76.13.0.0/16
    76.13.32.0/24                 76.13.0.0/16
    76.13.33.0/24                 76.13.0.0/16
    98.136.108.0/22               98.136.0.0/14
    98.137.192.0/21               98.136.0.0/14
    98.139.8.0/22                 98.136.0.0/14
    98.139.12.0/22                98.136.0.0/14
    98.139.16.0/21                98.136.0.0/14
    98.139.16.0/24                98.136.0.0/14
    98.139.17.0/24                98.136.0.0/14
    98.139.21.0/24                98.136.0.0/14
    98.139.24.0/21                98.136.0.0/14
    98.139.32.0/20                98.136.0.0/14
    98.139.44.0/23                98.136.0.0/14
    98.139.124.0/22               98.136.0.0/14
    98.139.128.0/17               98.136.0.0/14
    98.139.133.0/24               98.136.0.0/14
    98.139.155.0/24               98.136.0.0/14
    98.139.199.0/24               98.136.0.0/14
    98.139.225.0/24               98.136.0.0/14
    209.73.180.0/22               209.73.160.0/19

Prefixes added and withdrawn by this origin AS in the past 7 days.

    + 76.13.0.0/24                Announced

Whois Entry

whois: 402609

IANA has recorded AS26101 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS26101\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:       26101
             ASName:         YAHOO-BF1
             ASHandle:       AS26101
             RegDate:        2002-07-05
             Updated:        2020-07-21
             Ref:            https://rdap.arin.net/registry/autnum/26101
             
             
             OrgName:        Yahoo Holdings Inc.
             OrgId:          OH-207
             Address:        770 BROADWAY FL 9
             City:           New York
             StateProv:      NY
             PostalCode:     10003-9558
             Country:        US
             RegDate:        2018-12-21
             Updated:        2025-09-03
             Ref:            https://rdap.arin.net/registry/entity/OH-207
             
             
             OrgTechHandle: OTC2-ARIN
             OrgTechName:   Oath Tech Contact
             OrgTechPhone:  +1-408-349-5555 
             OrgTechEmail:  rir-tech@oath.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/OTC2-ARIN
             
             OrgNOCHandle: OATHN-ARIN
             OrgNOCName:   Oath NOC
             OrgNOCPhone:  +1-408-349-5555 
             OrgNOCEmail:  rir-noc@yahoo-inc.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/OATHN-ARIN
             
             OrgAbuseHandle: OATHA-ARIN
             OrgAbuseName:   Oath Abuse
             OrgAbusePhone:  +1-408-349-3300 
             OrgAbuseEmail:  rir-abuse@yahoo-inc.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/OATHA-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.
             #