$ query “AS204666” --type=asn → 1 result(s)
AS204666 · TLAPNET-CZ
Jiri Tlapak
AS204666 belongs to Jiri Tlapak and is a residential access provider, established in Czechia in 2018. The system announces a respectable 15 104 IPv4 addresses, and supports IPv6. Its primary geographic footprint is in Czechia. Prefix announcements for this AS were recently updated.
Basic Information
- Country
- 🇨🇿 Czechia
- Category
- Internet Service Provider
- Network Role
- Access Provider
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- January 29, 2018
- Last Changed
- August 18, 2026
- Last Seen
- September 14, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 38 / 16
- IPv6 Prefixes (raw / aggregated)
- 11 / 10
- IPv4 Addresses
- 15 104
- Largest IPv4 Prefix
- /20 (4 096 addresses)
- Largest IPv6 Prefix
- /29
- Geolocated Countries
- 🇨🇿 Czechia (26 624 IPs)
- Prefix Changed
- September 12, 2026
Reputation
- Reputation
- Good — 2 flagged IPs out of 15 104 total (0.01%)
Connectivity Summary
- Upstream Providers
- 2 upstreams providing transit
- Downstream Customers
- 1 downstream buying transit
- Unclassified
- 1 unclassified BGP neighbor
- Degree
- 4 unique BGP neighbors
- Reach
- 1 network in customer cone
Upstream Providers (2)
Prefix Lists
IPv4 Prefixes (38 total)
- 37.221.240.0/20 (4 096 addresses (/20 prefix))
- 185.19.0.0/22 (1 024 addresses (/22 prefix))
- 45.153.192.0/22 (1 024 addresses (/22 prefix))
- 85.255.88.0/22 (1 024 addresses (/22 prefix))
- 185.230.172.0/22 (1 024 addresses (/22 prefix))
- 185.64.220.0/22 (1 024 addresses (/22 prefix))
- 185.87.140.0/22 (1 024 addresses (/22 prefix))
- 185.97.24.0/22 (1 024 addresses (/22 prefix))
- 185.243.172.0/22 (1 024 addresses (/22 prefix))
- 91.224.90.0/23 (512 addresses (/23 prefix))
- 213.108.162.0/23 (512 addresses (/23 prefix))
- 5.59.102.0/23 (512 addresses (/23 prefix))
- 185.188.100.0/23 (512 addresses (/23 prefix))
- 185.74.60.0/24 (256 addresses (/24 prefix))
- 185.188.103.0/24 (256 addresses (/24 prefix))
- 176.119.192.0/24 (256 addresses (/24 prefix))
IPv6 Prefixes (11 total)
- 2a04:c740::/29
- 2a04:f940::/29
- 2a05:aa00::/29
- 2a06:400::/29
- 2a0a:10c0::/29
- 2a0d:1880::/29
- 2a0d:3140::/29
- 2a0f:9300::/29
- 2a0f:fec0::/29
- 2a03:d840::/32