SIDERCA S.A.I.C.
AS21756 — tenaris.com
Summary
| Country |
 Argentina
|
| Organization | SIDERCA S.A.I.C. |
| Domain | tenaris.com |
| Number of IPv4 | 1,280 |
| Number of IPv6 | 3.0949× 1026 |
| AS Type | Business |
| Registry | LACNIC |
| Allocated | June 15, 2001 (about 25 years ago) |
| Updated | March 18, 2026 (about 5 months ago) |
IP Ranges
AS21756 announces 5 IPv4 ranges and 1 IPv6 range.
That's a total of 1,280 IPv4 addresses and 3.0949× 1026 IPv6 addresses.
| Prefix | Organization | Size | Registry | Status |
|---|---|---|---|---|
| 200.1.117.0/24 |
SIDERCA S.A.I.C.
|
256 | LACNIC | ASSIGNED |
| 200.9.229.0/24 |
SIDERCA S.A.I.C.
|
256 | LACNIC | ASSIGNED |
| 200.69.130.0/24 |
Claro
|
256 | LACNIC | REASSIGNED |
| 200.80.222.0/24 |
Claro
|
256 | LACNIC | REALLOCATED |
| 201.234.38.0/24 |
Cirion Technologies
|
256 | LACNIC | REALLOCATED |
| Prefix | Organization | Size | Registry | Status |
|---|---|---|---|---|
| 2801:188::/40 |
SIDERCA S.A.I.C.
|
3.0949× 1026 | LACNIC | ASSIGNED |
Peers
AS21756 does not have any direct peering agreements. Instead, its global connectivity is achieved through transit providers. While this setup ensures comprehensive reach, future peering could reduce latency and optimize route efficiency.
Upstreams
AS21756 connects to the global Internet via at least 3 upstream providers. In this setup, AS21756 acts as a customer, subscribing to these transit services to obtain full BGP routing information and ensure reliable, redundant access to external networks.
Downstreams
AS21756 currently has no downstream networks, meaning it does not serve as a transit provider to customer networks.