Autonomous system
AS11336 BLACKROCK-FINANCIAL-MANAGEMENT
Unclassified ARIN
Summary
BlackRock Financial Management, Inc.
enterprise legacy
BLACKROCK-FINANCIAL-MANAGEMENT is held by BlackRock Financial Management, Inc., the operating entity of the world's largest asset manager. It is a corporate stub, not a market-facing network: RIS sees 6 IPv4 prefixes, 1,536 addresses, no IPv6, and 3 observed neighbours.
What it's used for
BlackRock's own internet edge. All six announced prefixes are /24s inside a single contiguous run of 69.52.32.0–69.52.43.0, and the block is announced by BlackRock's own AS with a handful of transit neighbours — the classic dual/triple-homed enterprise arrangement, bought for resilience rather than reach. A firm of this size runs the overwhelming majority of its estate on private addressing; the public footprint only has to carry the perimeter.
Notable
The registrant field looks split at first glance and is not. Four of the six /24s register in ARIN to BlackRock Financial Management (BLK-69-52); the other two, 69.52.35.0/24 and 69.52.40.0/24, register to Barclays Global Investors. That is corporate history showing through the routing table, not a third party: BlackRock acquired Barclays Global Investors in 2009, the deal that produced today's iShares business. The BGI records were simply never re-papered. This is the intra-group / post-acquisition pattern, and treating a name mismatch like this as evidence of leased or brokered space would be exactly the wrong call.
Interesting
None of the twelve addresses we sampled returned a PTR. That is a sample, not a survey, and it supports no inference about the block — but it is worth saying plainly, because the temptation with a finance-sector network is to read reticence as significance. The routing evidence alone is sufficient: three neighbours and 1,536 addresses announced by the asset manager itself is an enterprise perimeter. It is not hosting, not a carrier, and it serves no customers.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-29, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 1.54K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 4 |
Registry
Allocation record
- Registry
- ARIN
- Registered
- 1998-07-08
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 6 with no ROA
- ROAs
- 0 authorising AS11336
- ASPA
- no ASPA record
- IRR
- 100% registered · 6 of 6 announcements
- Route objects
- 12 naming AS11336
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 448 networks and 1,849 prefixes, as published 2026-10-29. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere