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Autonomous System

AS133537

Downer New Zealand Limited

Announced IPs
256
CIDR prefixes
1
ASN
AS133537

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.

65/100
Moderate
How this score is built

Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

Top CIDR ranges

CIDRIPsPTR DensityOrganizationCountryStateCity
103.148.241.0/24 256
0.4%
Downer New Zealand Limited NZ

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS133537 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

PrefixAnnouncement samplesLast seen
103.148.241.0/24 28,912 2026-07-31 01:23:40

Frequently Asked Questions

What is AS133537?

AS133537 is an Autonomous System Number assigned to Downer New Zealand 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 AS133537 announce?

AS133537 announces 256 IPv4 addresses distributed across 1 routed CIDR prefixes. The network is registered in New Zealand.

Who operates AS133537?

AS133537 is operated by Downer New Zealand Limited. The organization is based in New Zealand. You can view all IP ranges and related ASNs on the organization page.

What country is AS133537 registered in?

AS133537 is registered in New Zealand. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-07-31 01:40:32 UTC
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