Cook Technical Institute
Cluster stats
Netblocks6
All fragments 37 blocks across 15 clusters
Cluster ID193394911
RegistryAPNIC
Customersfind customers using this network →
Evidence & provenance ?
Attribution unresolved
Shared handles clustered on 13 shared RIR contact/maintainer handles
Registry names 2 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works

Footprint over time

2 weekly snapshots · JSON
6 0 netblocks since 2026-07-05
2026-07-05 peak 6 2026-07-06

IP Ranges (6)

⬇ export CSV
CIDR Org name Registry Status Confidence
192.26.64.0/24 Cook Technical Institute ARIN ● high
192.82.176.0/21 Cook Technical Institute ARIN ● high
192.132.112.0/24 Cook Technical Institute ARIN ● high
199.74.32.0/20 Cook Technical Institute ARIN ● high
162.4.152.0/24 Cook_Technical_Institute APNIC ALLOCATED NON-PORTABLE ● low
162.4.153.0/24 Cook_Technical_Institute APNIC ALLOCATED NON-PORTABLE ● low

Network trust

what's this?
RPKI hygiene: A how networks compare →
100.0% of checked blocks have valid RPKI ROA coverage (6 of 6)
Possible discrepancies (6)

These blocks are registered to Cook Technical 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.

199.74.32.0/20 /20 authorized for AS5650 — Frontier Communications of America, Inc.
192.82.176.0/21 /21 authorized for AS5650 — Frontier Communications of America, Inc.
162.4.152.0/24 /24 authorized for AS5650 — Frontier Communications of America, Inc.
162.4.153.0/24 /24 authorized for AS5650 — Frontier Communications of America, Inc.
192.26.64.0/24 /24 authorized for AS5650 — Frontier Communications of America, Inc.
192.132.112.0/24 /24 authorized for AS5650 — Frontier Communications of America, Inc.

NIC Handles

AN3336-AP C11614708 C11628656 C11628661 C11634174 DCL-577 GRINI3-ARIN IUA-ARIN IUS-ARIN MAINT-NETELLY-IPXO MAINT-NETUTILS-AP NU14-AP +1 more