$ query “AS197451” --type=asn → 1 result(s)
AS197451 · VUTBR-AS
Brno University of Technology
AS197451 is run by Brno University of Technology and is a mid-size transit provider, established in Czechia in 2010. The system announces a respectable 67 072 IPv4 addresses, including a /16, and supports IPv6. The bulk of its IP address space is in Czechia.
Basic Information
- Country
- 🇨🇿 Czechia
- Category
- Education/Research
- Network Role
- Mid-size Transit
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- December 08, 2010
- Last Changed
- March 04, 2026
- Last Seen
- April 29, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 8 / 3
- IPv6 Prefixes (raw / aggregated)
- 4 / 4
- IPv4 Addresses
- 67 072
- Largest IPv4 Prefix
- /16 (65 536 addresses)
- Largest IPv6 Prefix
- /29
- Geolocated Countries
- 🇨🇿 Czechia (68 096 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Good — 2 flagged IPs out of 67 072 total (0.00%)
Connectivity Summary
- Upstream Providers
- 3 upstreams providing transit
- Downstream Customers
- 8 downstreams buying transit
- Degree
- 11 unique BGP neighbors
- Reach
- 12 networks in customer cone
Upstream Providers (3)
Prefix Lists
IPv4 Prefixes (8 total)
- 147.229.0.0/16 (65 536 addresses (/16 prefix))
- 185.149.204.0/22 (1 024 addresses (/22 prefix))
- 185.62.108.0/23 (512 addresses (/23 prefix))
IPv6 Prefixes (4 total)
- 2a07:6bc0::/29
- 2a03:2e4::/30
- 2a03:2e0::/32
- 2001:67c:1220::/46