Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Isp allocation +5
- Trust score 70 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 213.171.64.0/22 | 1.0K |
14.0%
|
A1 Internet BV | NL | — | — |
| 213.171.72.0/22 | 1.0K |
13.7%
|
A1 Internet BV | NL | Groningen | Den Horn |
| 79.98.176.0/23 | 512 |
9.0%
|
A1 Internet BV | NL | — | — |
| 213.171.68.0/23 | 512 |
4.9%
|
A1 Internet BV | NL | — | — |
| 213.171.72.0/23 | 512 |
25.8%
|
A1 Internet BV | NL | Groningen | Lettelbert |
| 79.98.179.0/24 | 256 |
47.3%
|
A1 Internet BV | NL | — | — |
| 91.142.132.0/24 | 256 |
0.0%
|
A1 Internet BV | NL | — | — |
| 213.171.74.0/24 | 256 |
3.1%
|
A1 Internet BV | NL | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS211251 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 213.171.75.0/24 | 13,553 | 2026-07-31 04:30:42 |
| 213.171.68.0/23 | 11,601 | 2026-07-31 04:39:11 |
| 91.142.132.0/24 | 11,590 | 2026-07-31 04:39:11 |
| 213.171.66.0/23 | 11,582 | 2026-07-31 04:39:11 |
| 79.98.179.0/24 | 11,578 | 2026-07-31 04:39:11 |
| 213.171.64.0/23 | 11,574 | 2026-07-31 04:39:11 |
| 79.98.176.0/24 | 11,551 | 2026-07-31 04:39:11 |
| 79.98.177.0/24 | 11,545 | 2026-07-31 04:39:11 |
| 213.171.74.0/24 | 11,517 | 2026-07-31 04:39:11 |
| 213.171.73.0/24 | 6,267 | 2026-07-31 03:26:05 |
| 213.171.67.0/24 | 6,259 | 2026-07-31 03:26:05 |
| 213.171.72.0/24 | 6,259 | 2026-07-31 03:26:05 |
Frequently Asked Questions
What is AS211251?
AS211251 is an Autonomous System Number assigned to A1 Internet BV. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS211251 announce?
AS211251 announces 3.6K IPv4 addresses distributed across 8 routed CIDR prefixes. The network is registered in The Netherlands.
Who operates AS211251?
AS211251 is operated by A1 Internet BV. The organization is based in The Netherlands. You can view all IP ranges and related ASNs on the organization page.
What country is AS211251 registered in?
AS211251 is registered in The Netherlands. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
