$ query “AS50522” --type=asn → 1 result(s)
AS50522 · SEWAN-NL
Sewan Nederland B.V.
AS50522 belongs to Sewan Nederland B.V. and is a residential access provider, established in the Netherlands in 2010. The system announces a respectable 16 384 IPv4 addresses, and supports IPv6. The bulk of its IP address space is in the Netherlands.
- Top 5% — Top 5% of all autonomous systems by reach and degree
Basic Information
- Country
- 🇳🇱 Netherlands
- Category
- Internet Service Provider
- Network Role
- Access Provider
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- February 02, 2010
- Last Changed
- May 12, 2026
- Last Seen
- June 14, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 11 / 11
- IPv6 Prefixes (raw / aggregated)
- 1 / 1
- IPv4 Addresses
- 16 384
- Largest IPv4 Prefix
- /20 (4 096 addresses)
- Largest IPv6 Prefix
- /32
- Geolocated Countries
- 🇳🇱 Netherlands (18 176 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 4 upstreams providing transit
- Peers
- 129 networks exchanging traffic without transit
- Downstream Customers
- 3 downstreams buying transit
- Unclassified
- 4 unclassified BGP neighbors
- Degree
- 140 unique BGP neighbors
- Reach
- 8 networks in customer cone
Upstream Providers (4)
Prefix Lists
IPv4 Prefixes (11 total)
- 81.173.48.0/20 (4 096 addresses (/20 prefix))
- 81.173.64.0/20 (4 096 addresses (/20 prefix))
- 109.235.32.0/21 (2 048 addresses (/21 prefix))
- 81.23.244.0/22 (1 024 addresses (/22 prefix))
- 81.173.0.0/22 (1 024 addresses (/22 prefix))
- 81.173.32.0/22 (1 024 addresses (/22 prefix))
- 81.173.96.0/22 (1 024 addresses (/22 prefix))
- 185.61.68.0/22 (1 024 addresses (/22 prefix))
- 81.173.126.0/23 (512 addresses (/23 prefix))
- 81.173.7.0/24 (256 addresses (/24 prefix))
- 81.173.125.0/24 (256 addresses (/24 prefix))
IPv6 Prefixes (1 total)
- 2a03:be00::/32