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
- Trust score 65 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 87.248.116.0/23 | 512 |
49.8%
|
Yahoo-UK Limited | GB | — | — |
| 87.248.113.0/24 | 256 |
99.6%
|
Yahoo-UK Limited | GB | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS203219 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 |
|---|---|---|
| 87.248.113.0/24 | 4,220 | 2026-07-24 02:24:42 |
| 87.248.117.0/24 | 4,215 | 2026-07-24 02:24:42 |
| 87.248.116.0/24 | 4,200 | 2026-07-24 02:24:42 |
Frequently Asked Questions
What is AS203219?
AS203219 is an Autonomous System Number assigned to Yahoo-UK Limited. 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 AS203219 announce?
AS203219 announces 768 IPv4 addresses distributed across 2 routed CIDR prefixes. The network is registered in The Netherlands.
Who operates AS203219?
AS203219 is operated by Yahoo-UK Limited. The organization is based in The Netherlands. You can view all IP ranges and related ASNs on the organization page.
What country is AS203219 registered in?
AS203219 is registered in The Netherlands. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
