$ query “AS42541” --type=asn → 1 result(s)
AS42541 — FIBERBY
Fiberby ApS
AS42541 is a residential access provider run by Fiberby ApS, based in Denmark since 2009. The network announces a respectable 11 008 IPv4 addresses. Supports IPv6.
- Top 5% — Top 5% of all autonomous systems by reach and degree
- #99 by Degree — Top 100 by unique BGP neighbor count
- #7 in Denmark — Top 10 by reach within country
Basic Information
- Country
- 🇩🇰 Denmark
- Category
- Internet Service Provider
- Network Role
- Access Provider
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- November 13, 2009
- Last Changed
- March 04, 2026
- Last Seen
- March 05, 2026
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 5 / 5
- IPv6 Prefixes (raw / aggregated)
- 1 / 1
- IPv4 Addresses
- 11 008
- Largest IPv4 Prefix
- /19 (8 192 addresses)
- Largest IPv6 Prefix
- /29
- Geolocated Countries
- 🇩🇰 DK (9 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Good — 1 flagged IPs out of 11 008 total (0.01%)
Connectivity Summary
- Upstream Providers
- 3 upstream autonomous systems providing transit
- Peers
- 1 465 autonomous systems exchanging traffic without transit fees
- Downstream Customers
- 6 downstream autonomous systems buying transit
- Degree
- 1 476 unique BGP neighbors (providers + customers + peers)
- Reach
- 9 — customer cone size measuring network influence
- Degree Rank
- #99
- Reach Rank
- #3 338
- Country Rank
- #7
Upstream Providers (3)
Prefix Lists
IPv4 Prefixes (5 total)
- 89.23.224.0/19 (8 192 addresses)
- 185.10.220.0/22 (1 024 addresses)
- 193.106.164.0/22 (1 024 addresses)
- 194.62.216.0/23 (512 addresses)
- 193.104.135.0/24 (256 addresses)
IPv6 Prefixes (1 total)
- 2a03:5440::/29