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
- Academic allocation +6
- Trust score 71 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS1851 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 |
|---|---|---|
| 130.220.0.0/16 | 8,450 | 2026-07-23 17:20:21 |
| 43.241.200.0/22 | 8,355 | 2026-07-23 17:19:31 |
| 103.37.128.0/22 | 8,313 | 2026-07-23 17:20:03 |
| 129.127.0.0/16 | 8,048 | 2026-07-23 17:20:20 |
| 45.121.132.0/22 | 8,032 | 2026-07-23 17:19:33 |
| 192.43.228.0/24 | 7,995 | 2026-07-23 17:20:49 |
| 203.9.156.0/24 | 7,967 | 2026-07-23 17:21:00 |
| 192.160.71.0/24 | 7,937 | 2026-07-23 17:20:50 |
| 192.43.227.0/24 | 7,935 | 2026-07-23 17:20:49 |
| 203.26.136.0/24 | 7,932 | 2026-07-23 17:21:00 |
Frequently Asked Questions
What is AS1851?
AS1851 is an Autonomous System Number assigned to Adelaide University. 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 AS1851 announce?
AS1851 announces 134.9K IPv4 addresses distributed across 17 routed CIDR prefixes. The network is registered in Australia.
Who operates AS1851?
AS1851 is operated by Adelaide University. The organization is based in Australia. You can view all IP ranges and related ASNs on the organization page.
What country is AS1851 registered in?
AS1851 is registered in Australia. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
