AS15507 — IT3GNS-P4-AS

AS15507 announces 1 IPv4 prefixes covering 256 addresses and 1 IPv6 prefixes.

About this network

The registry lookup failed, so nothing can be said about who holds the one block.

What it's used for

• A company network. One IPv4 /24 and one IPv6 /48 announced from Poland, two hundred and fifty-six addresses, through a single observed BGP neighbour.

Notable

• The registry lookup for the single IPv4 block failed. That is a failed fetch, not an empty record, so the netname and registrant here are unknown rather than absent.
• The AS handle strings together a technology abbreviation, a service abbreviation and the company code before the usual suffix.
• The IPv6 prefix comes from a range the registry uses for assignments that travel with the holder rather than with a provider.
• Three addresses were queried for reverse DNS and none returned a name.
• Routing history first records this network several years after the numbers around it appeared.

Interesting

• A failed lookup is worth stating plainly, because the alternative reading, that the block has no registration, would be wrong and would matter. The record may be complete and simply unreachable.
• One /24 alongside a /48 is the modern minimum: the smallest globally routable piece of each protocol, held so the network can be reached under its own number.
• A single upstream means this network is reachable only while that one relationship holds. For a footprint this small that is usually a cost decision taken on purpose, but it is still a single point of failure.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 193.201.36.0/24
• 2001:678:b18::/48

Upstream networks

• AS39603 P4 Sp. z o.o.

Adjacent networks

• AS39603 P4 Sp. z o.o.