ENVIRONMENTAL SYSTEMS RESEARCH INSTITUTE, INC.
Environmental Systems Research Institute
GLEIF verified
LEI
254900SCR62ECR9DIU10
Registered name
ENVIRONMENTAL SYSTEMS RESEARCH INSTITUTE, INC.
Jurisdiction
Ultimate parent
No parent on file in GLEIF
Cluster stats
| Netblocks | 29 |
| All fragments | 82 blocks across 34 clusters |
| Cluster ID | 191735839 |
| Registry | BGP |
| Owner jurisdiction | US-CA |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | GLEIF legal-entity match |
| Legal identity | LEI 254900SCR62ECR9DIU10 |
| Shared handles | clustered on 11 shared RIR contact/maintainer handles |
| Registry names | 4 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works | |
Footprint over time
2 weekly snapshots · JSON
29
0 netblocks since 2026-07-05
2026-07-05
peak 29
2026-07-06
IP Ranges (29)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 198.102.32.0/24 | Environmental Systems Research Institute | ARIN | ● high | |
| 198.102.32.0/24 | Environmental Systems Research Institute | BGP | ANNOUNCED | ● high |
| 198.102.33.0/24 | Environmental Systems Research Institute | BGP | ANNOUNCED | ● high |
| 198.102.34.0/24 | Environmental Systems Research Institute | BGP | ANNOUNCED | ● high |
| 198.102.36.0/24 | Environmental Systems Research Institute | BGP | ANNOUNCED | ● high |
| 198.102.38.0/24 | Environmental Systems Research Institute | BGP | ANNOUNCED | ● high |
| 198.102.39.0/24 | Environmental Systems Research Institute | BGP | ANNOUNCED | ● high |
| 198.102.41.0/24 | Environmental Systems Research Institute | BGP | ANNOUNCED | ● high |
| 198.102.42.0/24 | Environmental Systems Research Institute | BGP | ANNOUNCED | ● high |
| 198.102.43.0/24 | Environmental Systems Research Institute | BGP | ANNOUNCED | ● high |
| 198.102.45.0/24 | Environmental Systems Research Institute | BGP | ANNOUNCED | ● high |
| 198.102.46.0/24 | Environmental Systems Research Institute | BGP | ANNOUNCED | ● high |
| 198.102.50.0/24 | Environmental Systems Research Institute | BGP | ANNOUNCED | ● high |
| 198.102.58.0/24 | Environmental Systems Research Institute | BGP | ANNOUNCED | ● high |
| 198.102.60.0/24 | Environmental Systems Research Institute | BGP | ANNOUNCED | ● high |
| 198.102.61.0/24 | Environmental Systems Research Institute | BGP | ANNOUNCED | ● high |
| 198.102.62.0/24 | Environmental Systems Research Institute | BGP | ANNOUNCED | ● high |
| 198.102.63.0/24 | Environmental Systems Research Institute | BGP | ANNOUNCED | ● high |
| 77.77.142.224/28 | ENVIRONMENTAL-SYSTEMS-RESEARCH-INSTITUTE-INC-GTT | RIPE | ASSIGNED PA | ● low |
| 77.77.145.64/28 | ENVIRONMENTAL-SYSTEMS-RESEARCH-INSTITUTE-INC-GTT | RIPE | ASSIGNED PA | ● low |
| 77.77.156.16/28 | ENVIRONMENTAL-SYSTEMS-RESEARCH-INSTITUTE-INC-GTT | RIPE | ASSIGNED PA | ● low |
| 81.134.245.144/29 | ENVIRONMENTAL-AIR | RIPE | ASSIGNED PA | ● low |
| 212.81.79.0/28 | ENVIRONMENTAL-SYSTEMS-RESEARCH-INSTITUTE-INC-GTT | RIPE | ASSIGNED PA | ● low |
| 212.81.113.192/28 | ENVIRONMENTAL-SYSTEMS-RESEARCH-INSTITUTE-INC-GTT | RIPE | ASSIGNED PA | ● low |
| 213.235.5.224/29 | ENVIRONMENTAL-SYSTEMS-RESEARCH-INSTITUTE-INC-GTT | RIPE | ASSIGNED PA | ● low |
| 213.235.36.192/29 | ENVIRONMENTAL-SYSTEMS-RESEARCH-INSTITUTE-INC-GTT | RIPE | ASSIGNED PA | ● low |
| 2001:668:1f:fc7b::/64 | ENVIRONMENTAL-SYSTEMS-RESEARCH-INSTITUTE-INC-GTT | RIPE | ASSIGNED | ● low |
| 2a00:2381:25f8::/48 | ENVIRONMENTAL-AIR | RIPE | AGGREGATED-BY-LIR | ● low |
| 2a00:2381:25f8::/56 | ENVIRONMENTAL-AIR | RIPE | ASSIGNED | ● low |
Network trust
what's this?
RPKI hygiene: D
how networks compare →
31.0%
of checked blocks have valid RPKI ROA coverage
(9 of 29)
Possible discrepancies (2)
These blocks are registered to Environmental Systems Research Institute 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.
| 2a00:2381:25f8::/48 /48 | authorized for AS2856 — British Telecommunications PLC |
| 2a00:2381:25f8::/56 /56 | authorized for AS2856 — British Telecommunications PLC |
NIC Handles
AS10411
AS3257-IPAM-MNT
BTNET-MNT
C00002132
DUMY-RIPE
DUMY-RIPE
ENO94-ARIN
ENO94-ARIN
ENO94-ARIN
ESRI-1
ESRIA-ARIN