AS51800
Fiber Network S.R.O. — fiber.cz
Keep users in the loop.
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Summary
| Country |
 Czechia
|
| Organization | Fiber Network S.R.O. |
| Domain | fiber.cz |
| Number of IPv4 | 2,048 |
| Number of IPv6 | 7.9228× 1028 |
| AS Type | ISP |
| Registry | RIPE NCC |
| Allocated | November 05, 2010 (about 15 years ago) |
| Updated | March 27, 2020 (about 5 years ago) |
IP Ranges
AS51800 announces 1 IPv4 range and 1 IPv6 range.
That's a total of 2,048 IPv4 addresses and 7.9228× 1028 IPv6 addresses.
| Prefix | Organization | Size | Registry | Status |
|---|---|---|---|---|
| 217.28.80.0/21 |
Fiber Network S.R.O.
|
2,048 | RIPE NCC | ASSIGNED PA |
| Prefix | Organization | Size | Registry | Status |
|---|---|---|---|---|
| 2a02:28a8::/32 |
Fiber Network S.R.O.
|
7.9228× 1028 | RIPE NCC | ALLOCATED-BY-RIR |
Peers
AS51800 actively fosters the following peering relationships that enhance network performance through direct, settlement-free traffic exchange. Even with a modest number of peers, each connection serves as a strategic asset—optimizing routing, reducing latency, and minimizing transit costs.
Upstreams
AS51800 connects to the global Internet via at least 1 upstream provider. In this setup, AS51800 acts as a customer, subscribing to these transit services to obtain full BGP routing information and ensure reliable, redundant access to external networks.
Downstreams
AS51800 serves as a transit provider the following ASes, delivering the BGP routes needed for global connectivity. This downstream relationship underscores AS51800's role in extending Internet access beyond its own infrastructure.