WILLIAM BLAIR INTERNATIONAL, LTD
WILLIAM-BLAIR-CO-LLC
Data as of 2026-08-09
GLEIF verified
Limited data: only 2 ranges found registered
under this exact name. This may not reflect the organisation's full internet footprint — many companies'
web and cloud infrastructure is hosted under a third-party provider's own registration rather than their own.
LEI
213800D836LM6FFK9U60
Registered name
WILLIAM BLAIR INTERNATIONAL, LTD
Jurisdiction
Ultimate parent
No parent on file in GLEIF
Cluster stats
| Netblocks | 2 |
| IPv6 | 1 prefix (largest 2a00:2381:df1::/48) |
| Cluster ID | 218205729 |
| Registry | RIPE |
| Owner jurisdiction | GB |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | GLEIF legal-entity match |
| Legal identity | LEI 213800D836LM6FFK9U60 |
| Shared handles | clustered on 4 shared RIR contact/maintainer handles |
| Registry names | 2 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works · report an issue | |
IP Ranges (2)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 213.161.93.80/29 | Net-William-Blair-International-LTD | RIPE | ASSIGNED PA | ● low |
| 2a00:2381:df1::/48 | WILLIAM-BLAIR-CO-LLC | RIPE | AGGREGATED-BY-LIR | ● low |
IPv6 ranges (1)
| CIDR |
|---|
| 2a00:2381:df1::/48 |
Network trust
what's this?
RPKI hygiene: A
how networks compare →
100.0%
of checked blocks have valid RPKI ROA coverage
(2 of 2)
Possible discrepancies (1)
These blocks are registered to WILLIAM-BLAIR-CO-LLC but cryptographically authorized for a different, unrelated network (1 distinct holder) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.
| 2a00:2381:df1::/48 /48 | authorized for AS2856 — British Telecommunications Limited |
NIC Handles
ABOVENET-MNT
BTNET-MNT
DUMY-RIPE
DUMY-RIPE