AS12519
FastNet International Ltd
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 v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →Present at 3 internet exchanges: LINX LON1: Main, LONAP: LON0, LINX LON2
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 82.148.32.0/19 | 8.2K |
96.7%
|
FastNet International Ltd | GB | England | Stanmore |
| 87.252.32.0/19 | 8.2K |
88.8%
|
FastNet International Ltd | GB | England | Kensington |
| 212.42.160.0/19 | 8.2K |
89.1%
|
FastNet International Ltd | GB | England | Haywards Heath |
| 81.31.64.0/20 | 4.1K |
86.7%
|
FastNet International Ltd | GB | England | Brighton |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS12519 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 |
|---|---|---|
| 82.148.32.0/19 | 3,951 | 2026-07-20 12:20:53 |
| 87.252.32.0/19 | 3,854 | 2026-07-20 12:20:54 |
| 81.31.64.0/20 | 3,776 | 2026-07-20 12:20:53 |
| 212.42.160.0/19 | 3,687 | 2026-07-20 12:21:34 |
Frequently Asked Questions
What is AS12519?
AS12519 is an Autonomous System Number assigned to FastNet International Ltd. 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 AS12519 announce?
AS12519 announces 28.7K IPv4 addresses distributed across 4 routed CIDR prefixes. The network is registered in United Kingdom.
Who operates AS12519?
AS12519 is operated by FastNet International Ltd. The organization is based in United Kingdom. You can view all IP ranges and related ASNs on the organization page.
What country is AS12519 registered in?
AS12519 is registered in United Kingdom. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
