Country
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ASN LANDING PAGE
AS21859
ZEN-ECN - Zenlayer Inc
Last updated · Apr 4, 2026
Total prefixes
1782
IPv4 prefixes
1640
IPv6 prefixes
142
ASN summary
How to read the scale of AS21859
ZEN-ECN - Zenlayer Inc currently shows 1782 prefixes and 80 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 AS21859?
ZEN-ECN - Zenlayer Inc 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 AS21859 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
AS21859 ASN lookupAS21859 BGPAS21859 peersAS21859 prefixesAS21859 upstreamsZEN-ECN - Zenlayer Inc ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
AS135377
AS135377
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AS62610
AS62610
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AS24429
AS24429
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AS139341
AS139341
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AS142002
AS142002
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AS139057
AS139057
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AS5065
AS5065
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AS13444
AS13444
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AS45903
AS45903
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AS400866
AS400866
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AS396986
AS396986
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AS136744
AS136744
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AS150436
AS150436
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AS63473
AS63473
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AS132203
AS132203
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AS17497
AS17497
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AS151397
AS151397
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AS151373
AS151373
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AS52129
AS52129
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AS395793
AS395793
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AS9516
AS9516
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AS38854
AS38854
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AS393437
AS393437
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AS401783
AS401783
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AS214143
AS214143
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AS137280
AS137280
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AS202736
AS202736
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AS213607
AS213607
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AS215152
AS215152
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AS138152
AS138152
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AS18464
AS18464
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AS132139
AS132139
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AS41717
AS41717
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AS131618
AS131618
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AS137443
AS137443
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AS54113
AS54113
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AS45102
AS45102
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AS63731
AS63731
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AS197537
AS197537
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AS138571
AS138571
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Peers
AS4229
AS4229
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AS1299
AS1299
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AS2914
AS2914
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AS174
AS174
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AS6453
AS6453
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AS6939
AS6939
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AS3257
AS3257
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AS4788
AS4788
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AS20764
AS20764
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AS3356
AS3356
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AS38082
AS38082
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AS6762
AS6762
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AS7195
AS7195
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AS9498
AS9498
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AS3491
AS3491
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AS8966
AS8966
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AS8529
AS8529
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AS9299
AS9299
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AS3462
AS3462
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AS18403
AS18403
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AS12389
AS12389
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AS7552
AS7552
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AS198803
AS198803
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AS6461
AS6461
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AS12956
AS12956
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AS9260
AS9260
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AS200612
AS200612
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AS39386
AS39386
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AS1221
AS1221
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AS4775
AS4775
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AS12365
AS12365
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AS30844
AS30844
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AS24203
AS24203
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AS63956
AS63956
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AS4766
AS4766
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AS9002
AS9002
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AS9457
AS9457
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AS8220
AS8220
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AS17494
AS17494
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AS135905
AS135905
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Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 101.33.12.0/24 | AS21859 | — |
| 101.33.13.0/24 | AS21859 | — |
| 101.33.14.0/24 | AS21859 | — |
| 101.33.15.0/24 | AS21859 | — |
| 101.55.23.0/24 | AS21859 | — |
| 102.177.183.0/24 | AS21859 | — |
| 103.100.171.0/24 | AS21859 | — |
| 103.102.134.0/24 | AS21859 | — |
| 103.103.246.0/24 | AS21859 | — |
| 103.103.247.0/24 | AS21859 | — |
| 103.116.148.0/24 | AS21859 | — |
| 103.122.176.0/24 | AS21859 | — |
| 103.122.177.0/24 | AS21859 | — |
| 103.122.178.0/24 | AS21859 | — |
| 103.122.179.0/24 | AS21859 | — |
| 103.123.242.0/23 | AS21859 | — |
| 103.146.83.0/24 | AS21859 | — |
| 103.149.156.0/23 | AS21859 | — |
| 103.155.100.0/24 | AS21859 | — |
| 103.155.86.0/23 | AS21859 | — |
| 103.156.78.0/23 | AS21859 | — |
| 103.188.121.0/24 | AS21859 | — |
| 103.193.125.0/24 | AS21859 | — |
| 103.193.126.0/24 | AS21859 | — |
| 103.193.127.0/24 | AS21859 | — |
| 103.198.20.0/24 | AS21859 | — |
| 103.206.20.0/22 | AS21859 | — |
| 103.206.20.0/24 | AS21859 | — |
| 103.206.21.0/24 | AS21859 | — |
| 103.206.22.0/24 | AS21859 | — |
| 103.206.23.0/24 | AS21859 | — |
| 103.207.165.0/24 | AS21859 | — |
| 103.21.138.0/24 | AS21859 | — |
| 103.215.125.0/24 | AS21859 | — |
| 103.215.126.0/24 | AS21859 | — |
| 103.225.84.0/24 | AS21859 | — |
| 103.225.85.0/24 | AS21859 | — |
| 103.225.86.0/24 | AS21859 | — |
| 103.225.87.0/24 | AS21859 | — |
| 103.226.125.0/24 | AS21859 | — |
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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 AS21859 represent?
AS21859 is an autonomous system number used to identify an independently operated network. The current page associates it with ZEN-ECN - Zenlayer Inc 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 AS21859 page?
They help explain the scale, interconnection depth, and route structure of AS21859. 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 AS21859?
The best next step is usually to return to a concrete IP landing page to see how a specific address maps into AS21859, 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.