Alcoa USA Corp.
BGP inherited
Cluster stats
| Netblocks | 9 · 19,447 IPv4 addresses |
| Cluster ID | 208811703 |
| 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 | |
Footprint over time
5 weekly snapshots · JSON
10
0 netblocks since 2026-07-05
2026-07-05
peak 10
2026-07-19
IP Ranges (9)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 142.79.176.0/23 | Alcoa USA Corp. | BGP | ANNOUNCED | ● high |
| 142.79.177.0/24 | Alcoa USA Corp. | BGP | ANNOUNCED | ● high |
| 142.79.178.0/23 | Alcoa USA Corp. | BGP | ANNOUNCED | ● high |
| 142.79.179.0/24 | Alcoa USA Corp. | BGP | ANNOUNCED | ● high |
| 142.79.180.0/23 | Alcoa USA Corp. | BGP | ANNOUNCED | ● high |
| 142.79.180.0/24 | Alcoa USA Corp. | BGP | ANNOUNCED | ● high |
| 142.79.182.0/24 | Alcoa USA Corp. | BGP | ANNOUNCED | ● high |
| 142.79.182.0/23 | Alcoa USA Corp. | BGP | ANNOUNCED | ● high |
| 142.79.128.0/18 | Alcoa USA Corp. | ARIN | DIRECT ALLOCATION | ● low |
Network trust
what's this?
RPKI hygiene: B
how networks compare →
88.9%
of checked blocks have valid RPKI ROA coverage
(8 of 9)
Possible discrepancies (7)
These blocks are registered to Alcoa USA Corp. 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.
| 142.79.176.0/23 /23 | authorized for AS8030 — AT&T WorldNet |
| 142.79.178.0/23 /23 | authorized for AS8030 — AT&T WorldNet |
| 142.79.180.0/23 /23 | authorized for AS8030 — AT&T WorldNet |
| 142.79.182.0/23 /23 | authorized for AS8030 — AT&T WorldNet |
| 142.79.177.0/24 /24 | authorized for AS8030 — AT&T WorldNet |
| 142.79.179.0/24 /24 | authorized for AS8030 — AT&T WorldNet |
| 142.79.180.0/24 /24 | authorized for AS8030 — AT&T WorldNet |
NIC Handles
AS399361
AUC-68-Z
COPEL173-ARIN
ZA122-ARIN
ZA122-ARIN
ZA122-ARIN