A.R.T. ADVISORS, LLC
A.R.T. Advisors, LLC
GLEIF verified
LEI
549300579ZENHJYPC730
Registered name
A.R.T. ADVISORS, LLC
Jurisdiction
Ultimate parent
No parent on file in GLEIF
Cluster stats
| Netblocks | 17 · 2,835 IPv4 addresses |
| Registered in | United States (9) · Russia (4) · Czechia (2) · Poland (2) |
| Cluster ID | 208834759 |
| Registry | BGP |
| Owner jurisdiction | US-DE |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | GLEIF legal-entity match |
| Legal identity | LEI 549300579ZENHJYPC730 |
| Shared handles | clustered on 7 shared RIR contact/maintainer handles |
| Registry names | 6 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works | |
Footprint over time
5 weekly snapshots · JSON
23
0 netblocks since 2026-07-05
2026-07-05
peak 23
2026-07-19
IP Ranges (17)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 149.85.1.0/24 | A.R.T. Advisors, LLC | BGP | ANNOUNCED | ● high |
| 149.85.2.0/24 | A.R.T. Advisors, LLC | BGP | ANNOUNCED | ● high |
| 149.85.5.0/24 | A.R.T. Advisors, LLC | BGP | ANNOUNCED | ● high |
| 149.85.6.0/24 | A.R.T. Advisors, LLC | BGP | ANNOUNCED | ● high |
| 149.85.7.0/24 | A.R.T. Advisors, LLC | BGP | ANNOUNCED | ● high |
| 149.85.8.0/24 | A.R.T. Advisors, LLC | BGP | ANNOUNCED | ● high |
| 149.85.11.0/24 | A.R.T. Advisors, LLC | BGP | ANNOUNCED | ● high |
| 149.85.12.0/24 | A.R.T. Advisors, LLC | BGP | ANNOUNCED | ● high |
| 149.85.101.0/24 | A.R.T. Advisors, LLC | BGP | ANNOUNCED | ● high |
| 79.142.89.84/30 | ART-COM-LAN | RIPE | ASSIGNED PA | ● low |
| 79.142.90.160/30 | ART-COM-LAN | RIPE | ASSIGNED PA | ● low |
| 89.171.22.80/30 | ART-BUD | RIPE | ASSIGNED PA | ● low |
| 178.16.155.188/30 | ART-T-LAN | RIPE | ASSIGNED PA | ● low |
| 195.116.91.64/29 | ART-PEX | RIPE | ASSIGNED PA | ● low |
| 212.24.144.12/30 | ART-D | RIPE | ASSIGNED PA | ● low |
| 213.151.81.160/29 | ART-D | RIPE | ASSIGNED PA | ● low |
| 217.79.0.0/23 | ART-COM-LAN | RIPE | ASSIGNED PA | ● low |
Network trust
what's this?
RPKI hygiene: D
how networks compare →
47.1%
of checked blocks have valid RPKI ROA coverage
(8 of 17)
Possible discrepancies (1)
These blocks are registered to A.R.T. Advisors, 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.
| 217.79.0.0/23 /23 | authorized for AS8492 — "OBIT" Ltd. |
NIC Handles
AS19580
DIALTELECOM-MNT
DUMY-RIPE
DUMY-RIPE
NETIA-MNT
OBIT-MNT
TPNET