Report for 31747

Name

BLACKROCK-FINANCIAL-MANAGEMENT-2 - BlackRock Financial Management, 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.

31747 BLACKROCK-FINANCIAL-MANAGEMENT-2, US

  Adjacency:    13  Upstream:    13  Downstream:     0
  Upstream Adjacent AS list
    AS3758          SINGNET SingNet, SG
    AS9255          CONNECTPLUS-AS Singapore Telecom, SG
    AS7474          OPTUSCOM-AS01-AU SingTel Optus Pty Ltd, AU
    AS10021         KVH KVH Co.,Ltd, JP
    AS4637          ASN-TELSTRA-GLOBAL Telstra Global, HK
    AS11351         TWC-11351-NORTHEAST, US
    AS2516          KDDI KDDI CORPORATION, JP
    AS174           COGENT-174, US
    AS32787         PROLEXIC-TECHNOLOGIES-DDOS-MITIGATION-NETWORK, US
    AS3356          LEVEL3, US
    AS8220          COLT COLT Technology Services Group Limited, GB
    AS701           UUNET, US
    AS703           UUNET, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
13093 AS31747        ORIGIN  Originate:       6912 /19.25  Transit:          0 /0.00  BLACKROCK-FINANCIAL-MANAGEMENT-2, 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       %
 8766 AS31747       BLACKROCK-FINANCIAL-MANAGEMENT-2, US              26     10      5     21      5  19.23%


  Prefix               AS Path                              Aggregation Suggestion
  69.52.2.0/24         2497 32787 31747       
  69.52.3.0/24         57866 3356 31747       
  69.52.12.0/23        2497 32787 31747     + Announce - aggregate of 69.52.12.0/24 (2497 32787 31747) and 69.52.13.0/24 (2497 32787 31747)
  69.52.12.0/24        2497 32787 31747     - Withdrawn - aggregated with 69.52.13.0/24 (2497 32787 31747)
  69.52.13.0/24        2497 32787 31747     - Withdrawn - aggregated with 69.52.12.0/24 (2497 32787 31747)
  69.52.14.0/24        3257 701 31747         
  69.52.22.0/24        2497 701 31747         
  69.52.23.0/24        2497 32787 31747       
  69.52.33.0/24        2497 32787 31747       
  69.52.66.0/24        2497 32787 31747       
  69.52.67.0/24        2497 8220 31747        
  69.52.68.0/24        7018 174 31747         
  69.52.69.0/24        6939 32787 31747       
  69.52.72.0/23        2497 32787 31747     + Announce - aggregate of 69.52.72.0/24 (2497 32787 31747) and 69.52.73.0/24 (2497 32787 31747)
  69.52.72.0/24        2497 32787 31747     - Withdrawn - aggregated with 69.52.73.0/24 (2497 32787 31747)
  69.52.73.0/24        2497 32787 31747     - Withdrawn - aggregated with 69.52.72.0/24 (2497 32787 31747)
  69.52.134.0/24       2497 8220 31747        
  69.52.135.0/24       3303 4637 31747        
  69.52.136.0/24       3303 3356 31747        
  69.52.142.0/23       2497 8220 31747      + Announce - aggregate of 69.52.142.0/24 (2497 8220 31747) and 69.52.143.0/24 (2497 8220 31747)
  69.52.142.0/24       2497 8220 31747      - Withdrawn - aggregated with 69.52.143.0/24 (2497 8220 31747)
  69.52.143.0/24       2497 8220 31747      - Withdrawn - aggregated with 69.52.142.0/24 (2497 8220 31747)
  69.52.144.0/23       2497 8220 31747      + Announce - aggregate of 69.52.144.0/24 (2497 8220 31747) and 69.52.145.0/24 (2497 8220 31747)
  69.52.144.0/24       2497 8220 31747      - Withdrawn - aggregated with 69.52.145.0/24 (2497 8220 31747)
  69.52.145.0/24       2497 8220 31747      - Withdrawn - aggregated with 69.52.144.0/24 (2497 8220 31747)
  69.52.147.0/24       6939 703 31747         
  199.242.0.0/23       2497 32787 31747       
  199.242.4.0/23       2497 32787 31747     + Announce - aggregate of 199.242.4.0/24 (2497 32787 31747) and 199.242.5.0/24 (2497 32787 31747)
  199.242.4.0/24       2497 32787 31747     - Withdrawn - aggregated with 199.242.5.0/24 (2497 32787 31747)
  199.242.5.0/24       2497 32787 31747     - Withdrawn - aggregated with 199.242.4.0/24 (2497 32787 31747)
  199.242.6.0/24       2497 32787 31747       

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

AS31747   19 More Specifics   19 Total Advertisements   BLACKROCK-FINANCIAL-MANAGEMENT-2, US
    69.52.2.0/24                  69.52.0.0/16
    69.52.12.0/24                 69.52.0.0/16
    69.52.13.0/24                 69.52.0.0/16
    69.52.23.0/24                 69.52.0.0/16
    69.52.33.0/24                 69.52.0.0/16
    69.52.66.0/24                 69.52.0.0/16
    69.52.69.0/24                 69.52.0.0/16
    69.52.72.0/24                 69.52.0.0/16
    69.52.73.0/24                 69.52.0.0/16
    69.52.134.0/24                69.52.0.0/16
    69.52.135.0/24                69.52.0.0/16
    69.52.136.0/24                69.52.0.0/16
    69.52.143.0/24                69.52.0.0/16
    69.52.144.0/24                69.52.0.0/16
    69.52.147.0/24                69.52.0.0/16
    199.242.0.0/23                199.242.0.0/21
    199.242.4.0/24                199.242.0.0/21
    199.242.5.0/24                199.242.0.0/21
    199.242.6.0/24                199.242.0.0/21

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

    + 69.52.147.0/24              Announced

Whois Entry

whois: 402603

IANA has recorded AS31747 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS31747\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:       31747
             ASName:         BLACKROCK-FINANCIAL-MANAGEMENT-2
             ASHandle:       AS31747
             RegDate:        2007-01-24
             Updated:        2012-03-02
             Ref:            https://rdap.arin.net/registry/autnum/31747
             
             
             OrgName:        BlackRock Financial Management, Inc.
             OrgId:          BFML
             Address:        50 Hudson Yards
             City:           New York
             StateProv:      NY
             PostalCode:     10001
             Country:        US
             RegDate:        1994-04-21
             Updated:        2023-04-28
             Ref:            https://rdap.arin.net/registry/entity/BFML
             
             
             OrgTechHandle: ARINC56-ARIN
             OrgTechName:   Arin-Contact
             OrgTechPhone:  +1-212-810-3788 
             OrgTechEmail:  arin-contact@blackrock.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/ARINC56-ARIN
             
             OrgAbuseHandle: NETWO8337-ARIN
             OrgAbuseName:   network-abuse
             OrgAbusePhone:  +1-212-810-3788 
             OrgAbuseEmail:  network-abuse@blackrock.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/NETWO8337-ARIN
             
             OrgTechHandle: HUSHE3-ARIN
             OrgTechName:   Hu, Shenghai 
             OrgTechPhone:  +1-212-810-3646 
             OrgTechEmail:  shenghai.hu@blackrock.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/HUSHE3-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.
             #