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 →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 168.132.0.0/16 | 65.5K |
0.1%
|
Optus Customer Network | AU | Victoria | Melbourne |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS18191 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 |
|---|---|---|
| 168.132.220.0/22 | 8,258 | 2026-07-18 12:01:36 |
| 168.132.121.0/24 | 8,225 | 2026-07-18 12:01:36 |
| 168.132.0.0/16 | 7,611 | 2026-07-18 12:01:39 |
| 168.132.0.0/17 | 7,526 | 2026-07-18 12:01:39 |
| 168.132.128.0/17 | 7,522 | 2026-07-18 12:01:39 |
Frequently Asked Questions
What is AS18191?
AS18191 is an Autonomous System Number assigned to OPTUS CUSTOMER NETWORK. 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 AS18191 announce?
AS18191 announces 65.5K IPv4 addresses distributed across 1 routed CIDR prefixes. The network is registered in Australia.
Who operates AS18191?
AS18191 is operated by Optus Customer Network. The organization is based in Australia. You can view all IP ranges and related ASNs on the organization page.
What country is AS18191 registered in?
AS18191 is registered in Australia. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
