$ query “AS51800” --type=asn → 1 result(s)
AS51800 · FIBERNET-ASN
FIBER Network s.r.o.
AS51800 is run by FIBER Network s.r.o. and is a residential access provider, registered in Czechia since 2010. The system announces 2 048 IPv4 addresses, and supports IPv6. Most of its address space is geolocated to Czechia.
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
- November 05, 2010
- Last Changed
- September 01, 2026
- Last Seen
- September 06, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 1 / 1
- IPv6 Prefixes (raw / aggregated)
- 1 / 1
- IPv4 Addresses
- 2 048
- Largest IPv4 Prefix
- /21 (2 048 addresses)
- Largest IPv6 Prefix
- /32
- Geolocated Countries
- 🇨🇿 Czechia (2 048 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 1 upstream providing transit
- Peers
- 17 networks exchanging traffic without transit
- Downstream Customers
- 1 downstream buying transit
- Degree
- 19 unique BGP neighbors
- Reach
- 1 network in customer cone
Upstream Providers (1)
- AS49025 — PROZETA-NET
Prefix Lists
IPv4 Prefixes (1 total)
- 217.28.80.0/21 (2 048 addresses (/21 prefix))
IPv6 Prefixes (1 total)
- 2a02:28a8::/32