$ query “AS56821” --type=asn → 1 result(s)
AS56821 · KNVNET1-AS
KnVnet services s.r.o.
AS56821 belongs to KnVnet services s.r.o. and is an enterprise stub network, established in Czechia in 2018. The system announces 2 048 IPv4 addresses, and supports IPv6. Its primary geographic footprint is in Czechia.
Basic Information
- Country
- 🇨🇿 Czechia
- Category
- Business
- Network Role
- Stub Network
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- September 18, 2018
- Last Changed
- August 26, 2026
- Last Seen
- September 10, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 1 / 1
- IPv6 Prefixes (raw / aggregated)
- 2 / 2
- IPv4 Addresses
- 2 048
- Largest IPv4 Prefix
- /21 (2 048 addresses)
- Largest IPv6 Prefix
- /32
- Geolocated Countries
- 🇨🇿 Czechia (2 048 IPs)
- Prefix Changed
- August 26, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 1 upstream providing transit
- Degree
- 1 unique BGP neighbor
- Reach
- 0 networks in customer cone
Upstream Providers (1)
- AS16019 — VODAFONE-CZ-AS
Prefix Lists
IPv4 Prefixes (1 total)
- 89.239.24.0/21 (2 048 addresses (/21 prefix))
IPv6 Prefixes (2 total)
- 2a02:4007::/32
- 2a14:9880::/32