$ query “AS211251” --type=asn → 1 result(s)
AS211251 — A1-DC
A1 Internet BV
AS211251 is a residential access provider operated by A1 Internet BV, established in the Netherlands in 2021. The network announces 3 328 IPv4 addresses. No IPv6 support — it's 2026, just saying.
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
- May 28, 2021
- Last Changed
- March 04, 2026
- Last Seen
- March 05, 2026
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 11 / 7
- IPv6 Prefixes (raw / aggregated)
- 0 / 0
- IPv4 Addresses
- 3 328
- Largest IPv4 Prefix
- /22 (1 024 addresses)
- Geolocated Countries
- 🇳🇱 NL (8 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs out of 3 328 total (0.00%)
Connectivity Summary
- Upstream Providers
- 3 upstream autonomous systems providing transit
- Peers
- 24 autonomous systems exchanging traffic without transit fees
- Downstream Customers
- 1 downstream autonomous systems buying transit
- Degree
- 28 unique BGP neighbors (providers + customers + peers)
- Reach
- 1 — customer cone size measuring network influence
- Degree Rank
- #5 368
- Reach Rank
- #11 186
Upstream Providers (3)
Prefix Lists
IPv4 Prefixes (11 total)
- 213.171.64.0/22 (1 024 addresses)
- 79.98.176.0/23 (512 addresses)
- 213.171.68.0/23 (512 addresses)
- 213.171.72.0/23 (512 addresses)
- 79.98.179.0/24 (256 addresses)
- 91.142.132.0/24 (256 addresses)
- 213.171.74.0/24 (256 addresses)