AS204339
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
- Trust score 65 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS204339 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 |
|---|---|---|
| 46.17.105.0/24 | 56,124 | 2026-09-10 15:06:16 |
| 45.138.73.0/24 | 54,925 | 2026-09-10 15:06:51 |
| 45.138.74.0/24 | 54,900 | 2026-09-10 15:06:51 |
| 45.9.72.0/24 | 54,657 | 2026-09-10 15:06:51 |
| 46.8.218.0/24 | 48,213 | 2026-09-10 15:07:25 |
| 46.8.96.0/24 | 48,104 | 2026-09-10 15:07:05 |
| 46.8.178.0/24 | 48,084 | 2026-09-10 15:07:25 |
| 46.8.179.0/24 | 48,062 | 2026-09-10 15:07:25 |
| 91.217.76.0/24 | 45,597 | 2026-09-10 15:07:05 |
| 95.81.120.0/24 | 44,280 | 2026-09-10 15:06:51 |
| 95.81.119.0/24 | 44,226 | 2026-09-10 15:07:05 |
| 95.81.93.0/24 | 44,194 | 2026-09-10 15:06:51 |
| 91.186.209.0/24 | 44,012 | 2026-09-10 15:06:51 |
| 91.186.208.0/24 | 43,977 | 2026-09-10 15:06:51 |
| 91.186.210.0/24 | 43,974 | 2026-09-10 15:06:51 |
| 95.214.9.0/24 | 43,409 | 2026-09-10 15:06:23 |
| 91.186.211.0/24 | 42,635 | 2026-09-10 15:06:51 |
| 91.186.220.0/24 | 42,497 | 2026-09-10 15:07:05 |
| 91.186.221.0/24 | 42,481 | 2026-09-10 15:07:05 |
| 91.186.223.0/24 | 42,471 | 2026-09-10 15:07:05 |
| 91.186.222.0/24 | 41,984 | 2026-09-10 15:07:05 |
| 83.147.194.0/24 | 40,564 | 2026-09-10 15:07:25 |
| 157.228.152.0/24 | 34,837 | 2026-09-10 15:07:16 |
| 157.228.153.0/24 | 34,823 | 2026-09-10 15:07:16 |
| 104.128.131.0/24 | 33,497 | 2026-09-10 15:07:25 |
| 135.136.189.0/24 | 29,938 | 2026-09-10 15:06:30 |
| 185.40.7.0/24 | 29,832 | 2026-09-10 15:06:30 |
| 185.58.204.0/24 | 29,689 | 2026-09-10 15:07:05 |
| 185.252.144.0/24 | 29,667 | 2026-09-10 15:07:25 |
| 185.217.197.0/24 | 29,666 | 2026-09-10 15:06:30 |
| 185.106.93.0/24 | 29,655 | 2026-09-10 15:06:51 |
| 185.106.94.0/24 | 29,640 | 2026-09-10 15:06:51 |
| 185.102.136.0/24 | 29,636 | 2026-09-10 15:07:05 |
| 185.233.82.0/24 | 29,615 | 2026-09-10 15:06:51 |
| 185.117.116.0/24 | 29,541 | 2026-09-10 15:06:30 |
| 185.200.190.0/24 | 29,503 | 2026-09-10 15:06:35 |
| 193.124.182.0/24 | 29,347 | 2026-09-10 15:07:05 |
| 193.124.190.0/24 | 29,341 | 2026-09-10 15:07:05 |
| 193.124.183.0/24 | 29,282 | 2026-09-10 15:07:05 |
| 135.136.181.0/24 | 27,816 | 2026-09-10 15:06:23 |
| 132.243.21.0/24 | 27,673 | 2026-09-10 15:06:51 |
| 132.243.20.0/24 | 27,659 | 2026-09-10 15:06:51 |
| 132.243.22.0/24 | 27,635 | 2026-09-10 15:06:51 |
| 132.243.23.0/24 | 27,630 | 2026-09-10 15:06:51 |
| 178.253.31.0/24 | 23,300 | 2026-09-10 15:06:51 |
| 157.228.189.0/24 | 1,831 | 2026-09-10 15:07:05 |
| 157.228.188.0/24 | 1,829 | 2026-09-10 15:07:05 |
| 45.9.72.147/32 | 42 | 2026-06-26 19:44:40 |
| 135.136.181.92/32 | 6 | 2026-06-30 13:00:58 |
| 132.243.23.246/32 | 2 | 2026-08-07 10:59:39 |
Showing top 50 of 56 announced prefixes by sample volume.
Frequently Asked Questions
What is AS204339?
AS204339 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 AS204339 announce?
AS204339 announces 12.0K IPv4 addresses distributed across 34 routed CIDR prefixes. The network is registered in United Kingdom.
Who operates AS204339?
AS204339 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 AS204339 registered in?
AS204339 is registered in United Kingdom. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
