$ query “AS203993” --type=asn → 1 result(s)
AS203993 · GNA-DC1-AS
S.J.M. Steffann
AS203993 is operated by S.J.M. Steffann and serves as an educational/research access provider, registered in the Netherlands since 2015. The system announces 1 280 IPv4 addresses, and supports IPv6. Its primary geographic footprint is in the United States, with additional presence in the Netherlands.
Basic Information
- Country
- 🇳🇱 Netherlands
- Category
- Education/Research
- Network Role
- Access Provider
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- September 16, 2015
- Last Changed
- June 13, 2026
- Last Seen
- July 16, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 4 / 3
- IPv6 Prefixes (raw / aggregated)
- 4 / 3
- IPv4 Addresses
- 1 280
- Largest IPv4 Prefix
- /23 (512 addresses)
- Largest IPv6 Prefix
- /32
- Geolocated Countries
- 🇺🇸 United States (768 IPs), 🇳🇱 Netherlands (512 IPs)
- Prefix Changed
- June 13, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 2 upstreams providing transit
- Peers
- 30 networks exchanging traffic without transit
- Downstream Customers
- 1 downstream buying transit
- Unclassified
- 1 unclassified BGP neighbor
- Degree
- 34 unique BGP neighbors
- Reach
- 1 network in customer cone
Upstream Providers (2)
Prefix Lists
IPv4 Prefixes (4 total)
- 67.221.252.0/23 (512 addresses (/23 prefix))
- 185.54.92.0/23 (512 addresses (/23 prefix))
- 67.221.255.0/24 (256 addresses (/24 prefix))
IPv6 Prefixes (4 total)
- 2a00:8642::/32
- 2607:fae0:f00c::/47
- 2607:fae0:f001::/48