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Autonomous System

AS400816

Stupp Fiber, LLC

Announced IPs
1,280
CIDR prefixes
12
ASN
AS400816

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.

70/100
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

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS400816 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

PrefixAnnouncement samplesLast seen
204.154.9.0/24 13,709 2026-07-31 10:10:07
204.154.11.0/24 13,686 2026-07-31 10:10:07
204.154.10.0/24 5,949 2026-07-31 10:10:07
204.154.8.0/24 5,945 2026-07-31 10:10:07
204.154.8.0/22 4,977 2026-07-31 10:10:07
204.154.12.0/24 4,976 2026-07-31 10:10:07

Frequently Asked Questions

What is AS400816?

AS400816 is an Autonomous System Number assigned to Stupp Fiber, LLC. 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 AS400816 announce?

AS400816 announces 1.3K IPv4 addresses distributed across 12 routed CIDR prefixes. The network is registered in United States.

Who operates AS400816?

AS400816 is operated by Stupp Fiber, LLC. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.

What country is AS400816 registered in?

AS400816 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-07-31 10:40:31 UTC
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