Software Engineering Institute
Data as of 2026-08-16
BGP inherited
Cluster stats
| Netblocks | 4 · 1,536 IPv4 addresses |
| IPv6 | 1 prefix (largest 2620:8b:4000::/48) |
| All fragments | 9 blocks across 3 clusters |
| Cluster ID | 222382083 |
| Registry | BGP |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | BGP parent (inherited) |
| Shared handles | clustered on 6 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 (4)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 147.72.252.0/22 | Software Engineering Institute | BGP | ANNOUNCED | ● high |
| 192.88.209.0/24 | Software Engineering Institute | BGP | ANNOUNCED | ● high |
| 192.88.210.0/24 | Software Engineering Institute | BGP | ANNOUNCED | ● high |
| 2620:8b:4000::/48 | Software Engineering Institute | BGP | ANNOUNCED | ● high |
IPv6 ranges (1)
| CIDR |
|---|
| 2620:8b:4000::/48 |
Network trust
what's this?
RPKI hygiene: F
how networks compare →
16.7%
of checked blocks have valid RPKI ROA coverage
(1 of 6)
Possible discrepancies (1)
These blocks are registered to Software Engineering 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.
| 147.72.252.0/22 /22 | authorized for AS9 — Carnegie Mellon University |
NIC Handles
AS36407
CERT-1-Z
SIT6-ARIN
SIT6-ARIN
SIT6-ARIN
SIT6-ARIN