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ASN LANDING PAGE

AS57821

NONATTACHED-AS - Nonattached Network e.V.

Last updated · Apr 4, 2026

Country

—

Total prefixes

2

IPv4 prefixes

1

IPv6 prefixes

1

ASN summary

How to read the scale of AS57821

NONATTACHED-AS - Nonattached Network e.V. currently shows 2 prefixes and 40 upstream, downstream, or peer relationships. Larger prefix inventories often indicate broader network footprint, but they should still be read together with country and peering context.

When is an ASN page most useful?

ASN landing pages are more useful than a single IP page when you want cloud provider attribution, routing research, infrastructure comparison, or network topology analysis at the organization level.

How should you read the country, organization, and role of AS57821?

NONATTACHED-AS - Nonattached Network e.V. is currently associated with an unknown region. Country data is only a starting point; the more important signals are the organization name, website, prefix volume, and peering relationships that reveal whether the network behaves like a cloud platform, ISP, CDN, or enterprise backbone.

What should you inspect next after the AS57821 page?

This page is currently showing live ASN data that can be used for peer, prefix, and network scale analysis. The most useful next step is usually to return to a related IP landing page, then compare that concrete address with this ASN profile and with broader topic pages for routing, cloud attribution, or WHOIS ownership analysis.

Search intents this ASN page helps cover

AS57821 ASN lookupAS57821 BGPAS57821 peersAS57821 prefixesAS57821 upstreamsNONATTACHED-AS - Nonattached Network e.V. ASN

Upstreams

Detailed data for this ASN is not available right now.

Downstreams

Detailed data for this ASN is not available right now.

Peers

AS12586

AS12586

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AS6939

AS6939

—

AS57463

AS57463

—

AS24482

AS24482

—

AS44901

AS44901

—

AS25091

AS25091

—

AS52025

AS52025

—

AS58299

AS58299

—

AS41051

AS41051

—

AS25394

AS25394

—

AS8298

AS8298

—

AS29551

AS29551

—

AS13101

AS13101

—

AS8804

AS8804

—

AS8495

AS8495

—

AS212635

AS212635

—

AS25220

AS25220

—

AS57433

AS57433

—

AS59790

AS59790

—

AS29404

AS29404

—

AS207960

AS207960

—

AS210667

AS210667

—

AS12817

AS12817

—

AS14840

AS14840

—

AS39083

AS39083

—

AS47138

AS47138

—

AS51184

AS51184

—

AS59238

AS59238

—

AS59570

AS59570

—

AS61430

AS61430

—

AS209185

AS209185

—

AS211869

AS211869

—

AS212049

AS212049

—

AS213045

AS213045

—

AS6774

AS6774

—

AS8793

AS8793

—

AS9498

AS9498

—

AS12759

AS12759

—

AS13335

AS13335

—

AS15844

AS15844

—

Prefix inventory

PrefixNameCountry
193.160.39.0/24AS57821—
2001:67c:26f4::/48AS57821—

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AS8075 · Microsoft

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AS16509 · Amazon

A useful ASN landing page for understanding AWS and large cloud-network ownership.

Related lookups and next steps

WHOIS vs ASN Ownership Guide

Continue from this ASN into the differences between WHOIS ownership and ASN ownership.

Routing Troubleshooting and Network Analysis

Continue from this ASN into route troubleshooting and network analysis.

Cloud Network and ASN Comparison

Useful when you want to compare this ASN against larger cloud and edge networks.

WHOIS and IP Ownership Guide

Continue from the ASN page into WHOIS and ownership verification.

Frequently asked questions about this ASN page

What does AS57821 represent?

AS57821 is an autonomous system number used to identify an independently operated network. The current page associates it with NONATTACHED-AS - Nonattached Network e.V. in an unknown region, which helps determine whether it behaves like a cloud provider, ISP, CDN, or enterprise backbone.

What are peers, upstreams, and prefixes useful for on the AS57821 page?

They help explain the scale, interconnection depth, and route structure of AS57821. Richer peering and upstream data often indicate broader network reach, but they should still be interpreted together with prefixes and related IP landing pages.

What should you do after reviewing AS57821?

The best next step is usually to return to a concrete IP landing page to see how a specific address maps into AS57821, then continue into cloud, WHOIS, or routing topic pages to understand the network in a broader context.

Related topics

WHOIS vs ASN Ownership Guide

Understand why WHOIS ownership and ASN ownership can differ, and how to combine both when deciding who really owns or operates an IP.

WHOIS and IP Ownership Guide

Use WHOIS, ASN, prefixes, and organization data to determine who ultimately owns an IP, range, or resolved domain target.

BGP and ASN Basics Guide

Learn what ASN, BGP routes, prefixes, upstreams, downstreams, and peers mean, then explore real ASN pages.

Cloud Network and ASN Comparison

Compare large cloud and edge networks such as Google, Cloudflare, Microsoft, and Amazon through their ASN landing pages.