AS54113
FASTLY

AS54113 announces 377,088 IPv4 addresses across 128 routed ranges, registered in US. Figures come from the public global routing table and are refreshed daily.

Is AS54113 datacenter space?

Yes, at least in part. Address space announced by AS54113 appears in Fastly's own published IP ranges, which means the provider documents this space as its infrastructure. Traffic from it carries the dch signal in Maskbreak's verdict, worth 40 points toward the 0–100 risk score — enough to reach the review band on its own, never enough to block.

See Fastly IP ranges for the full published footprint.

What an AS number does and does not tell you

An autonomous system number identifies who announces a block of addresses to the internet's routing table. It is an organisational fact, and a durable one — useful for attributing traffic to a hosting company, a carrier, or a university.

It is not a risk signal. A residential ISP's AS carries the household traffic of millions of ordinary customers and, at the same time, whatever residential proxy exits have been installed on those customers' devices. A hosting AS carries scrapers and legitimate server-to-server integrations in the same ranges. Scoring an address on the reputation of its AS produces exactly the false positives that make fraud tooling untrustworthy.

Announced IPv4 ranges

All 128 announced ranges.

Check a specific address

The AS tells you who announces a range. An address check answers whether one address inside it is a Tor exit or sits in a published cloud range — for example 16.5.61.0, the first address in this AS's announced space; whether a visitor is on a VPN or proxy needs a live visit. The free lookup tool takes any address, and the IP intelligence hub explains what each signal means.

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