ASN AS31747 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS31747?

AS31747 is listed under BlackRock Financial Management, Inc..

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS31747 BlackRock Financial Management, Inc.

BlackRock Financial Management, Inc. blackrock.com

US 26 Routes

AS Data

AS31747

AS31747 – BlackRock Financial Management, Inc.

AS Number	31747
AS Name	BLACKROCK-FINANCIAL-MANAGEMENT-2
Organization	BlackRock Financial Management, Inc. (bfml)
Country	US
Website	blackrock.com
Number of IPv4 Routes	26
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2007-01-24

ASN Intelligence API for production workflows

Use ASN data for AS31747 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

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IP Ranges

Raw Whois Response

#
# 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.
#

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "31747",
    "as_handle" : "AS31747",
    "as_name" : "BLACKROCK-FINANCIAL-MANAGEMENT-2",
    "tech_contacts" : [ "ARINC56-ARIN", "HUSHE3-ARIN" ],
    "abuse_contacts" : [ "NETWO8337-ARIN" ],
    "date_created" : "2007-01-24",
    "date_updated" : "2012-03-02",
    "source" : "https://rdap.arin.net/registry/autnum/31747"
  } ],
  "organization" : {
    "handle" : "BFML",
    "name" : "BlackRock Financial Management, Inc.",
    "address" : [ "50 Hudson Yards", "New York", "NY", "10001", "US" ],
    "city" : "New York",
    "state" : "NY",
    "zip_code" : "10001",
    "country" : [ "US" ],
    "date_created" : "1994-04-21",
    "date_updated" : "2023-04-28",
    "source" : "https://rdap.arin.net/registry/entity/BFML",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "ARINC56-ARIN",
    "name" : "Arin-Contact",
    "email" : [ "arin-contact@blackrock.com" ],
    "phone" : [ "+1-212-810-3788" ],
    "source" : "https://rdap.arin.net/registry/entity/ARINC56-ARIN"
  }, {
    "handle" : "HUSHE3-ARIN",
    "name" : "Hu, Shenghai",
    "email" : [ "shenghai.hu@blackrock.com" ],
    "phone" : [ "+1-212-810-3646" ],
    "source" : "https://rdap.arin.net/registry/entity/HUSHE3-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "NETWO8337-ARIN",
    "name" : "network-abuse",
    "email" : [ "network-abuse@blackrock.com" ],
    "phone" : [ "+1-212-810-3788" ],
    "source" : "https://rdap.arin.net/registry/entity/NETWO8337-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS7474	SingTel Optus Pty Ltd	AU
AS703	Verizon Business	US
AS8220	COLT Technology Services Group Limited	GB
AS9255	Singapore Telecom	SG
AS10021	KVH Co.,Ltd	JP
AS11351	Charter Communications Inc	US
AS701	Verizon Business/UUnet	US
AS4637	Telstra Global	HK
AS9255	Singapore Telecom, ConnectPlus	SG
AS174	Cogent Communications, LLC	US
AS2516	KDDI CORPORATION	JP
AS3758	SingNet Pte Ltd	SG
AS4637	Telstra International Limited	HK
AS3356	Level 3 Parent, LLC	US
AS701	Verizon Business	US
AS703	Verizon Business/UUnet ASPAC	US
AS3758	SingNet	SG
AS32787	Akamai Technologies, Inc.	US

Upstreams

AS Number	Description	Country
AS7474	SingTel Optus Pty Ltd	AU
AS703	Verizon Business	US
AS8220	COLT Technology Services Group Limited	GB
AS10021	KVH Co.,Ltd	JP
AS11351	Charter Communications Inc	US
AS9255	Singapore Telecom, ConnectPlus	SG
AS174	Cogent Communications, LLC	US
AS2516	KDDI CORPORATION	JP
AS3758	SingNet Pte Ltd	SG
AS4637	Telstra International Limited	HK
AS3356	Level 3 Parent, LLC	US
AS701	Verizon Business	US
AS32787	Akamai Technologies, Inc.	US

Contacts

Email Contacts

shenghai.hu@blackrock.com arin-contact@blackrock.com

Abuse Contacts

network-abuse@blackrock.com

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