AS203821
It4 Polska Sp. Z O.O. — it4polska.pl
Summary
| Country |
 Poland
|
| Organization | It4 Polska Sp. Z O.O. |
| Domain | it4polska.pl |
| Number of IPv4 | 768 |
| Number of IPv6 | 1.8447× 1019 |
| AS Type | ISP |
| Registry | RIPE NCC |
| Allocated | October 23, 2015 (about 9 years ago) |
| Updated | November 16, 2020 (about 4 years ago) |
IP Ranges
AS203821 announces 3 IPv4 ranges and 1 IPv6 range.
That's a total of 768 IPv4 addresses and 1.8447× 1019 IPv6 addresses.
| Prefix | Organization | Size | Registry | Status |
|---|---|---|---|---|
| 91.207.184.0/24 |
Sylwester Harasim
|
256 | RIPE NCC | ASSIGNED PI |
| 91.207.185.0/24 |
Sylwester Harasim
|
256 | RIPE NCC | ASSIGNED PI |
| 217.28.134.0/24 |
Enformatel Sp. Z O.O.
|
256 | RIPE NCC | ALLOCATED PA |
| Prefix | Organization | Size | Registry | Status |
|---|---|---|---|---|
| 2a10:f781:10:bb06::/64 |
EPIX-LORA
|
1.8447× 1019 | RIPE NCC | ALLOCATED-BY-LIR |
Peers
AS203821 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
AS203821 connects to the global Internet via at least 4 upstream providers. In this setup, AS203821 acts as a customer, subscribing to these transit services to obtain full BGP routing information and ensure reliable, redundant access to external networks.
Downstreams
AS203821 currently has no downstream networks, meaning it does not serve as a transit provider to customer networks.