Cook County
BGP inherited
Cluster stats
| Netblocks | 23 |
| All fragments | 39 blocks across 14 clusters |
| Cluster ID | 205225432 |
| Registry | APNIC |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | BGP parent (inherited) |
| Shared handles | clustered on 24 shared RIR contact/maintainer handles |
| Registry names | 6 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works | |
Footprint over time
4 weekly snapshots · JSON
23
+8 netblocks since 2026-07-05
2026-07-05
peak 23
2026-07-13
IP Ranges (23)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 12.218.238.0/23 | Cook County | BGP | ANNOUNCED | ● high |
| 66.99.240.0/23 | Cook County | BGP | ANNOUNCED | ● high |
| 115.42.162.16/29 | COOK-SG | APNIC | ASSIGNED NON-PORTABLE | ● high |
| 162.217.184.0/24 | Cook County | BGP | ANNOUNCED | ● high |
| 162.217.184.0/22 | Cook County | BGP | ANNOUNCED | ● high |
| 162.217.185.0/24 | Cook County | BGP | ANNOUNCED | ● high |
| 162.217.186.0/24 | Cook County | BGP | ANNOUNCED | ● high |
| 162.217.187.0/24 | Cook County | BGP | ANNOUNCED | ● high |
| 192.6.92.0/23 | Cook Technical Institute | ARIN | ● high | |
| 192.6.196.0/23 | Cook Technical Institute | ARIN | ● high | |
| 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 | |
| 62.6.222.224/28 | COOK-AND | RIPE | ASSIGNED PA | ● low |
| 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 |
| 212.157.11.72/29 | COOK-NET1 | RIPE | ASSIGNED PA | ● low |
| 217.38.36.16/29 | COOK-AND | RIPE | ASSIGNED PA | ● low |
| 2a00:2381:2421::/48 | COOK-AND | RIPE | AGGREGATED-BY-LIR | ● low |
| 2a00:2381:2421::/56 | COOK-AND | RIPE | ASSIGNED | ● low |
| 2a00:2381:3ce6::/48 | COOK-AND | RIPE | AGGREGATED-BY-LIR | ● low |
| 2a00:2381:3ce6:200::/56 | COOK-AND | RIPE | ASSIGNED | ● low |
Network trust
what's this?
RPKI hygiene: C
how networks compare →
69.6%
of checked blocks have valid RPKI ROA coverage
(16 of 23)
Possible discrepancies (12)
These blocks are registered to Cook County but cryptographically authorized for a different, unrelated network (2 distinct holders) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.
| 2a00:2381:2421::/48 /48 | authorized for AS2856 — British Telecommunications Limited |
| 2a00:2381:3ce6::/48 /48 | authorized for AS2856 — British Telecommunications Limited |
| 2a00:2381:2421::/56 /56 | authorized for AS2856 — British Telecommunications Limited |
| 2a00:2381:3ce6:200::/56 /56 | authorized for AS2856 — British Telecommunications Limited |
| 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. |
| 192.6.92.0/23 /23 | authorized for AS5650 — Frontier Communications of America, Inc. |
| 192.6.196.0/23 /23 | 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
AS2068-AP
AS46286
BTNET-MNT
C11614703
C11614707
C11614708
C11628656
C11628661
C11634174
DCL-577
DUMY-RIPE
+12 more