ENVIRONMENTAL SYSTEMS RESEARCH INSTITUTE, INC.
Environmental Systems Research Institute
Data as of 2026-08-23
GLEIF verified
LEI
254900SCR62ECR9DIU10
Registered name
ENVIRONMENTAL SYSTEMS RESEARCH INSTITUTE, INC.
Jurisdiction
Ultimate parent
No parent on file in GLEIF
Cluster stats
| Netblocks | 26 · 4,704 IPv4 addresses |
| IPv6 | 1 prefix (largest 2001:668:1f:fc7b::/64) |
| Registered in | United States (24) · United Kingdom (2) |
| Cluster ID | 228084127 |
| 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 14 shared RIR contact/maintainer handles |
| Registry names | 4 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works · report an issue | |
Footprint over time
9 weekly snapshots · JSON
27
-2 netblocks since 2026-07-05
2026-07-05
peak 29
2026-08-23
IP Ranges (26)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 198.102.32.0/24 | Environmental Systems Research Institute | ARIN | ASSIGNMENT | ● 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 |
| 205.166.25.0/24 | Environmental Systems Corporation | ARIN | DIRECT ALLOCATION | ● 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 |
| 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 |
IPv6 ranges (1)
Network trust
what's this?
RPKI hygiene: D
how networks compare →
22.2%
of checked blocks have valid RPKI ROA coverage
(6 of 27)
No discrepancies found among checked blocks.
NIC Handles
AS10411
AS3257-IPAM-MNT
C00002132
DUMY-RIPE
DUMY-RIPE
ENO94-ARIN
ENO94-ARIN
ENO94-ARIN
ESC-9
ESRI-1
ESRIA-ARIN
JD319-ARIN
+2 more