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 v1.2.1 — a transparent heuristic, not a definitive verdict. How it works →
About Nominet UK
Nominet UK is currently delegated by IANA to be the manager of the .uk domain name. Nominet directly manages registrations directly under .uk, and some of the second level domains .co.uk, .org.uk, .sch.uk, .me.uk, .net.uk, .ltd.uk and .plc.uk.
⚠ 17 MOAS prefixes — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS43519 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) |
|---|---|---|
| 103.49.80.0/24 | AS43519, AS137502 | 2026-10-15 08:59:09 |
| 103.49.81.0/24 | AS43519, AS137502 | 2026-10-15 08:59:09 |
| 103.49.82.0/24 | AS43519, AS137502 | 2026-10-15 08:59:09 |
| 213.248.216.0/24 | AS43519, AS137502 | 2026-10-15 08:59:09 |
| 43.230.50.0/24 | AS43519, AS137502 | 2026-10-15 08:59:09 |
| 213.248.217.0/24 | AS43519, AS137502 | 2026-10-15 08:59:09 |
| 213.248.254.0/24 | AS43519, AS138177 | 2026-10-15 08:59:09 |
| 103.49.83.0/24 | AS43519, AS137502 | 2026-10-15 08:59:09 |
| 213.248.222.0/24 | AS43519, AS137502 | 2026-10-15 08:59:09 |
| 43.230.51.0/24 | AS43519, AS137502 | 2026-10-15 08:59:09 |
| 213.248.223.0/24 | AS43519, AS137502 | 2026-10-15 08:59:09 |
| 213.248.220.0/24 | AS43519, AS137502 | 2026-10-15 08:59:09 |
| 213.248.221.0/24 | AS43519, AS137502 | 2026-10-15 08:59:09 |
| 43.230.48.0/24 | AS43519, AS137502 | 2026-10-15 08:59:09 |
| 213.248.218.0/24 | AS43519, AS137502 | 2026-10-15 08:59:09 |
Showing the 15 most recently detected of 17 MOAS prefixes. Many multi-origin prefixes on large networks are benign (anycast); see all MOAS anomalies.
Network profile
Source: PeeringDB →Present at 7 internet exchanges: LINX LON2, SFMIX, LINX Manchester, LINX LON1: Main, LINX NoVA, AMS-IX, LONAP: LON0
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 213.248.216.0/21 | 2.0K |
0.6%
|
Nominet UK | GB | — | — |
| 43.230.48.0/22 | 1.0K |
0.6%
|
Nominet UK | AU | — | — |
| 103.49.80.0/22 | 1.0K |
0.6%
|
Nominet UK | AU | — | — |
| 213.248.200.0/22 | 1.0K |
21.2%
|
Nominet UK | GB | — | — |
| 213.248.224.0/22 | 1.0K |
50.6%
|
Nominet UK | GB | — | — |
| 51.149.0.0/23 | 512 |
0.4%
|
Nominet UK | GB | — | — |
| 51.149.254.0/23 | 512 |
0.4%
|
Nominet UK | GB | — | — |
| 194.227.194.0/23 | 512 |
0.0%
|
Nominet UK | GB | — | — |
| 212.148.212.0/23 | 512 |
0.0%
|
Nominet UK | GB | — | — |
| 213.248.204.0/23 | 512 |
76.2%
|
Nominet UK | GB | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS43519 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 |
|---|---|---|
| 51.149.0.0/24 | 23,938 | 2026-10-15 08:26:16 |
| 194.227.194.0/24 | 22,706 | 2026-10-15 08:26:14 |
| 212.148.213.0/24 | 22,212 | 2026-10-15 08:23:24 |
| 51.149.255.0/24 | 21,299 | 2026-10-15 08:33:08 |
| 213.248.216.0/24 | 20,986 | 2026-10-15 08:03:10 |
| 213.248.219.0/24 | 20,797 | 2026-10-15 08:03:10 |
| 213.248.224.0/24 | 20,520 | 2026-10-15 08:26:17 |
| 213.248.203.0/24 | 20,496 | 2026-10-15 08:26:16 |
| 213.248.217.0/24 | 20,431 | 2026-10-15 08:03:10 |
| 213.248.218.0/24 | 20,399 | 2026-10-15 08:03:10 |
| 43.230.48.0/24 | 19,882 | 2026-10-15 08:33:08 |
| 43.230.51.0/24 | 19,852 | 2026-10-15 08:33:08 |
| 213.248.227.0/24 | 19,691 | 2026-10-15 08:23:26 |
| 43.230.50.0/24 | 19,603 | 2026-10-15 08:33:08 |
| 43.230.49.0/24 | 19,484 | 2026-10-15 08:33:08 |
| 51.149.254.0/24 | 15,994 | 2026-10-15 08:33:08 |
| 212.148.212.0/24 | 15,948 | 2026-10-15 08:26:11 |
| 213.248.201.0/24 | 15,421 | 2026-10-15 08:26:14 |
| 213.248.202.0/24 | 15,063 | 2026-10-15 08:26:11 |
| 213.248.226.0/24 | 14,959 | 2026-10-15 08:26:17 |
| 213.248.222.0/24 | 13,906 | 2026-10-15 08:33:08 |
| 213.248.223.0/24 | 13,891 | 2026-10-15 08:33:08 |
| 213.248.221.0/24 | 13,883 | 2026-10-15 08:33:08 |
| 213.248.220.0/24 | 13,847 | 2026-10-15 08:33:08 |
| 213.248.204.0/24 | 13,490 | 2026-10-15 08:26:11 |
| 213.248.200.0/24 | 12,379 | 2026-10-15 08:33:10 |
| 51.149.1.0/24 | 11,902 | 2026-10-15 08:26:16 |
| 194.227.195.0/24 | 11,199 | 2026-10-15 08:26:13 |
| 103.49.83.0/24 | 10,393 | 2026-10-15 08:47:20 |
| 103.49.82.0/24 | 10,234 | 2026-10-15 08:47:20 |
| 213.248.225.0/24 | 10,214 | 2026-10-15 08:26:17 |
| 103.49.80.0/24 | 10,206 | 2026-10-15 08:47:20 |
| 103.49.81.0/24 | 10,174 | 2026-10-15 08:47:20 |
| 213.248.205.0/24 | 8,886 | 2026-10-15 08:26:13 |
| 213.248.254.0/24 | 1,463 | 2026-10-15 05:16:05 |
Frequently Asked Questions
What is AS43519?
AS43519 is an Autonomous System Number assigned to Nominet UK. 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 AS43519 announce?
AS43519 announces 8.7K IPv4 addresses distributed across 10 routed CIDR prefixes. The network is registered in United Kingdom.
Who operates AS43519?
AS43519 is operated by Nominet UK. The organization is based in United Kingdom. You can view all IP ranges and related ASNs on the organization page.
What country is AS43519 registered in?
AS43519 is registered in United Kingdom. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
