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 v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 109.125.0.0/18 | 16.4K |
5.9%
|
Eir Broadband | IE | — | — |
| 212.129.80.0/20 | 4.1K |
45.8%
|
Eir Broadband | IE | Leinster | Dublin |
| 212.129.72.0/21 | 2.0K |
91.7%
|
Eir Broadband | IE | Leinster | Dublin |
| 212.129.68.0/22 | 1.0K |
0.0%
|
Eir Broadband | IE | — | — |
| 185.51.72.0/23 | 512 |
99.4%
|
Eir Broadband | IE | — | — |
| 212.129.66.0/23 | 512 |
0.4%
|
Eir Broadband | IE | — | — |
| 212.129.64.0/24 | 256 |
9.8%
|
Eir Broadband | IE | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS15751 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 |
|---|---|---|
| 212.129.72.0/21 | 4,302 | 2026-07-18 12:00:51 |
| 109.125.0.0/18 | 4,252 | 2026-07-18 12:00:51 |
| 212.129.68.0/22 | 4,224 | 2026-07-18 12:00:51 |
| 185.51.72.0/23 | 4,217 | 2026-07-18 12:00:51 |
| 212.129.64.0/24 | 4,202 | 2026-07-18 12:00:51 |
| 212.129.66.0/23 | 4,201 | 2026-07-18 12:00:51 |
| 212.129.80.0/20 | 4,131 | 2026-07-18 12:00:51 |
Frequently Asked Questions
What is AS15751?
AS15751 is an Autonomous System Number assigned to Eir Broadband. 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 AS15751 announce?
AS15751 announces 24.8K IPv4 addresses distributed across 7 routed CIDR prefixes. The network is registered in Ireland.
Who operates AS15751?
AS15751 is operated by Eir Broadband. The organization is based in Ireland. You can view all IP ranges and related ASNs on the organization page.
What country is AS15751 registered in?
AS15751 is registered in Ireland. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
