AS204997
First Server Limited
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
- Active-threat / abuse risk −12
- Trust score 53 / 100
Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →
⚠ 4 MOAS prefixes — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS204997 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.
| Prefix | Origin ASNs | Last detected (UTC) |
|---|---|---|
| 185.204.3.130/32 | AS50113, AS56630, AS202984, AS204997 | 2026-10-27 09:51:36 |
| 139.28.223.118/32 | AS50113, AS204997 | 2026-10-27 09:51:36 |
| 157.228.136.236/32 | AS50113, AS204997 | 2026-10-26 04:06:25 |
| 185.255.134.120/32 | AS50113, AS204997 | 2026-10-26 04:06:25 |
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS204997 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 |
|---|---|---|
| 45.144.64.0/24 | 205,674 | 2026-10-27 09:24:35 |
| 45.144.65.0/24 | 205,504 | 2026-10-27 09:24:35 |
| 45.144.66.0/24 | 205,453 | 2026-10-27 09:24:35 |
| 46.17.104.0/24 | 205,292 | 2026-10-27 09:24:35 |
| 45.144.67.0/24 | 205,278 | 2026-10-27 09:24:35 |
| 91.217.81.0/24 | 195,878 | 2026-10-27 09:24:35 |
| 104.128.132.0/24 | 191,997 | 2026-10-27 09:24:35 |
| 104.128.136.0/24 | 191,907 | 2026-10-27 09:24:35 |
| 104.128.141.0/24 | 191,768 | 2026-10-27 09:24:35 |
| 104.128.140.0/24 | 191,444 | 2026-10-27 09:24:35 |
| 104.128.137.0/24 | 191,037 | 2026-10-27 09:24:35 |
| 147.78.65.0/24 | 189,395 | 2026-10-27 09:24:35 |
| 147.78.67.0/24 | 189,304 | 2026-10-27 09:24:35 |
| 139.28.223.0/24 | 189,252 | 2026-10-27 09:24:35 |
| 147.78.64.0/24 | 189,234 | 2026-10-27 09:24:35 |
| 147.78.66.0/24 | 189,131 | 2026-10-27 09:24:35 |
| 139.28.222.0/24 | 188,951 | 2026-10-27 09:24:35 |
| 135.136.191.0/24 | 188,551 | 2026-10-27 09:24:35 |
| 135.136.188.0/24 | 187,814 | 2026-10-27 09:24:35 |
| 178.253.45.0/24 | 187,551 | 2026-10-27 09:24:35 |
| 185.104.248.0/24 | 187,258 | 2026-10-27 09:24:35 |
| 178.253.44.0/24 | 187,187 | 2026-10-27 09:24:35 |
| 185.17.3.0/24 | 187,075 | 2026-10-27 09:24:35 |
| 135.136.180.0/24 | 186,684 | 2026-10-27 09:24:35 |
| 178.253.38.0/24 | 185,844 | 2026-10-27 09:24:35 |
| 178.253.39.0/24 | 185,668 | 2026-10-27 09:24:35 |
| 185.174.138.0/24 | 185,604 | 2026-10-27 09:24:35 |
| 185.189.14.0/24 | 185,506 | 2026-10-27 09:24:35 |
| 185.139.69.0/24 | 185,263 | 2026-10-27 09:24:35 |
| 185.189.15.0/24 | 185,109 | 2026-10-27 09:24:35 |
| 185.139.71.0/24 | 185,100 | 2026-10-27 09:24:35 |
| 185.180.231.0/24 | 184,984 | 2026-10-27 09:24:35 |
| 185.189.12.0/24 | 184,858 | 2026-10-27 09:24:35 |
| 185.139.70.0/24 | 184,832 | 2026-10-27 09:24:35 |
| 185.139.68.0/24 | 184,771 | 2026-10-27 09:24:35 |
| 185.188.183.0/24 | 184,723 | 2026-10-27 09:24:35 |
| 185.189.13.0/24 | 184,683 | 2026-10-27 09:24:35 |
| 185.188.182.0/24 | 184,576 | 2026-10-27 09:24:35 |
| 185.255.132.0/24 | 184,206 | 2026-10-27 09:24:35 |
| 185.204.3.0/24 | 184,189 | 2026-10-27 09:24:35 |
| 185.255.134.0/24 | 184,148 | 2026-10-27 09:24:35 |
| 185.252.147.0/24 | 184,136 | 2026-10-27 09:24:35 |
| 185.195.27.0/24 | 184,089 | 2026-10-27 09:24:35 |
| 185.212.148.0/24 | 184,006 | 2026-10-27 09:24:35 |
| 185.255.133.0/24 | 183,985 | 2026-10-27 09:24:35 |
| 185.195.25.0/24 | 183,977 | 2026-10-27 09:24:35 |
| 185.252.146.0/24 | 183,872 | 2026-10-27 09:24:35 |
| 185.104.249.0/24 | 183,846 | 2026-10-27 09:24:35 |
| 185.244.173.0/24 | 183,728 | 2026-10-27 09:24:35 |
| 185.204.2.0/24 | 183,642 | 2026-10-27 09:24:35 |
Showing top 50 of 94 announced prefixes by sample volume.
Frequently Asked Questions
What is AS204997?
AS204997 is an Autonomous System Number assigned to First Server 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 AS204997 announce?
AS204997 announces 16.1K IPv4 addresses distributed across 32 routed CIDR prefixes. The network is registered in United Kingdom.
Who operates AS204997?
AS204997 is operated by First Server Limited. The organization is based in United Kingdom. You can view all IP ranges and related ASNs on the organization page.
What country is AS204997 registered in?
AS204997 is registered in United Kingdom. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
