AS50163 — ALTNET-SKVELYNET

AS50163 announces 1 IPv4 prefixes covering 2,048 addresses and 1 IPv6 prefixes.

About this network

ALTNET-SKVELYNET is operated by Altnet s.r.o.

What it's used for

• The address space carries residential and small business internet access, evidenced by reverse DNS entries such as ip-0-210.skvelynet.cz and ip-254-213.skvelynet.cz.
• The network announces 2048 IPv4 addresses in a single /21 prefix (109.71.208.0/21) and one IPv6 prefix, with only 2 observed routing neighbours, indicating a local access provider rather than a transit carrier.
• Traffic consists of subscriber eyeballs for wireless and wired internet connections, along with VoIP services, as Altnet s.r.o. provides internet connectivity through its own network in the Czech Republic.

Notable

• The RDAP registrant for the announced prefix is Altnet s.r.o., matching the AS holder and the netname CZ-ALTNET-20091124.
• The address inventory is compact, consisting of a single contiguous IPv4 block and one IPv6 prefix, typical of a regional ISP managing its own allocated space.

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

Announced prefixes

• 109.71.208.0/21
• 2a03:e00::/32

Upstream networks

• AS47232 ISP Alliance a.s.
• AS15935 ha-vel internet s.r.o.

Adjacent networks

• AS47232 ISP Alliance a.s.
• AS15935 ha-vel internet s.r.o.

Routing security

• RPKI: 2 valid, 0 invalid and 0 not-found announcements; 2 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 2 route objects.
• Listed in as-sets: AS-GRAPESC-CZ, AS-HA-VEL-TRANSITCUST, AS-HURRICANEV6, AS-ISPALLIANCE-CZ, AS-RETN-ACTUAL-V4.