AS31747 — BLACKROCK-FINANCIAL-MANAGEMENT-2 - BlackRock Financial Management, Inc.

AS31747 announces 15 IPv4 prefixes covering 7,936 addresses and 0 IPv6 prefixes.

About this network

BLACKROCK-FINANCIAL-MANAGEMENT-2 is held by BlackRock Financial Management, Inc.

What it's used for

• The address space carries internal corporate infrastructure, evidenced by netnames BLK-69-52 and BFM registered to BlackRock Financial Management, Inc.
• The AS announces 6912 IPv4 addresses across 16 prefixes with 12 observed neighbours, a ratio consistent with a large internal corporate estate rather than a transit or access provider.

Notable

• All registrants in the RDAP sample agree with the announcer, listing BlackRock Financial Management, Inc. for every prefix.
• The inventory consists of 14 prefixes in the 69.52.0.0/16 range and 2 in 199.242.0.0/16, all in the United States.
• No IPv6 prefixes are announced in the inventory.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 69.52.2.0/23
• 69.52.12.0/23
• 69.52.14.0/24
• 69.52.22.0/23
• 69.52.33.0/24
• 69.52.66.0/23
• 69.52.68.0/23
• 69.52.72.0/23
• 69.52.134.0/23
• 69.52.136.0/22
• 69.52.142.0/23
• 69.52.144.0/22
• 199.242.0.0/23
• 199.242.4.0/23
• 199.242.6.0/24

Upstream networks

• AS32787 Akamai Technologies, Inc.
• AS8220 COLT Technology Services Group Limited
• AS3356 Level 3 Parent, LLC
• AS4637 Telstra Global
• AS701 Verizon Business
• AS2516 KDDI CORPORATION
• AS9255 Singapore Telecom
• AS10021 KVH Co.,Ltd
• AS174 Cogent Communications, LLC
• AS11351 Charter Communications Inc

Adjacent networks

• AS32787 Akamai Technologies, Inc.
• AS8220 COLT Technology Services Group Limited
• AS3356 Level 3 Parent, LLC
• AS4637 Telstra Global
• AS701 Verizon Business
• AS2516 KDDI CORPORATION
• AS9255 Singapore Telecom
• AS10021 KVH Co.,Ltd
• AS174 Cogent Communications, LLC
• AS11351 Charter Communications Inc

Routing security

• RPKI: 0 valid, 0 invalid and 30 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 97% of announcements registered; 43 route objects.
• Listed in as-sets: AS-CHTR-SYNC, AS-HURRICANE, AS-IIJ, AS-IIJ6, AS-KDD, AS-KDDCUSTOMER2, AS-KVH, AS-PNAPTOK, AS-PROLE, AS-RETN-ACTUAL-V4, AS-RR-SYNC, AS-SH-CUST, AS-TELSTRA-INTL-CUSTOMERS, AS2497:AS-IIJ, AS2497:AS-IIJ6, AS3491:AS-CUSTOMERS-AP, AS7473:AS-CUSTOMERS:AS3758, AS7474:AS-CUSTOMERS, AS7545:AS-TPGN-CUSTOMERS, AS8220:AS-COLTDE, AS8220:AS-COLTJP, AS8220:AS-COLTSG, AS8220:AS-COLTUK.