ResearchRouting table, RPKI, IRR & looking glass

AS31747 BlackRock Financial Management, Inc.

AS31747 (BLACKROCK-FINANCIAL-MANAGEMENT-2) is registered to BlackRock Financial Management, Inc. in US. It originates 29 prefixes in the global routing table.

29
IPv4 prefixes
0
IPv6 prefixes
7,680
IPv4 addresses
0%
RPKI valid
Registration

Who holds AS31747

Names from RIPE NCC’s daily list of every allocated AS number. The ASN lookup fetches the full WHOIS record live.

AS number
AS31747
Handle
BLACKROCK-FINANCIAL-MANAGEMENT-2
Organization
BlackRock Financial Management, Inc.
Country
US
ASPA
None published
Routing

What AS31747 announces

Prefixes originated by AS31747 in the RouteViews table (refreshed every four hours), each checked against the RPKI (every ten minutes) and the IRR (daily).

IPv4 prefixes
29
IPv6 prefixes
0
IPv4 addresses
7,680 (30 /24s)
RPKI valid
0 0%
RPKI invalid
0
RPKI not found
29
ROAs naming AS31747
0
With an IRR route object
28 96%
Prefixes

Announced prefixes

Each opens its own page: who announces it, the paths our collectors see, its ROAs and route objects.

IPv4 (29)
69.52.2.0/2469.52.3.0/2469.52.12.0/2469.52.13.0/2469.52.14.0/2469.52.22.0/2469.52.23.0/2469.52.33.0/2469.52.66.0/2469.52.67.0/2469.52.68.0/2469.52.69.0/2469.52.72.0/2469.52.73.0/2469.52.134.0/2469.52.135.0/2469.52.136.0/2469.52.137.0/2469.52.138.0/2469.52.139.0/2469.52.142.0/2469.52.143.0/2469.52.144.0/2469.52.145.0/2469.52.147.0/24199.242.0.0/23199.242.4.0/24199.242.5.0/24199.242.6.0/24

RPKI valid   RPKI invalid   no ROA covers it

Neighbors

Who AS31747 is reached through

The AS just before AS31747 in the paths our looking glass collectors hold, for 29 of its prefixes. Usually a transit provider, sometimes a peer. The number is how many of those prefixes it was seen on.

AS32787 PROLEXIC-TECHNOLOGIES-DDOS-MITIGATION-NETWORK 14AS8220 COLT 8AS3356 LEVEL3 5AS2516 KDDI 3AS701 UUNET 2AS4637 ASN-TELSTRA-GLOBAL 2AS11351 TWC-11351-NORTHEAST 1AS174 COGENT-174 1
IRR

Routing registry objects

From the mirrored IRR databases (RADB, the five RIRs and more). Look it up live.

Sourceas-nameMaintained by
RADBBLACK_ROCK_INVESTMENT_MANAGEMENTMAINT-RR

Route objects with origin AS31747: RADB 33 · ARIN 10

as-sets that list AS31747 (26)
AS-CHTR-SYNCAS-HURRICANEAS-IIJAS-IIJ6AS-KDDAS-KDDCUSTOMER2AS-KVHAS-LUMEN-CUSTOMERS-ASNSAS-PNAPTOKAS-PROLEAS-REACH-CUSTOMERSAS-RETN-ACTUAL-V4AS-RR-SYNCAS-SH-CUSTAS-STARHUBAS-TELSTRA-INTL-CUSTOMERSAS2497:AS-IIJAS2497:AS-IIJ6AS3491:AS-CUSTOMERS-APAS7473:AS-CUSTOMERS:AS3758AS7474:AS-CUSTOMERSAS7545:AS-TPGN-CUSTOMERSAS8220:AS-COLTDEAS8220:AS-COLTJPAS8220:AS-COLTSGAS8220:AS-COLTUK
Tools

Check AS31747 live

ASN lookup and WHOISRPKI validatorASPA validatorIRR lookup