Country
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ASN LANDING PAGE
AS17621
CNCGROUP-SH China Unicom Shanghai network
Last updated · Apr 4, 2026
Total prefixes
781
IPv4 prefixes
378
IPv6 prefixes
403
ASN summary
How to read the scale of AS17621
CNCGROUP-SH China Unicom Shanghai network currently shows 781 prefixes and 42 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 AS17621?
CNCGROUP-SH China Unicom Shanghai network 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 AS17621 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
AS17621 ASN lookupAS17621 BGPAS17621 peersAS17621 prefixesAS17621 upstreamsCNCGROUP-SH China Unicom Shanghai network ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
AS10212
AS10212
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AS37963
AS37963
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AS45079
AS45079
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AS59083
AS59083
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AS63570
AS63570
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AS109
AS109
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AS9814
AS9814
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AS137759
AS137759
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AS9809
AS9809
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AS56000
AS56000
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AS24141
AS24141
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AS10100
AS10100
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AS58850
AS58850
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AS7609
AS7609
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AS56006
AS56006
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AS146842
AS146842
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AS23853
AS23853
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AS139148
AS139148
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AS56013
AS56013
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AS151247
AS151247
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AS139138
AS139138
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AS137758
AS137758
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AS38375
AS38375
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AS38381
AS38381
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AS17739
AS17739
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AS137746
AS137746
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AS135432
AS135432
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AS59019
AS59019
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AS17775
AS17775
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AS45073
AS45073
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AS55992
AS55992
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AS63538
AS63538
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AS146792
AS146792
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AS37965
AS37965
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AS45110
AS45110
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AS58593
AS58593
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AS59078
AS59078
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AS55956
AS55956
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AS55996
AS55996
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AS63603
AS63603
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Peers
Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 101.52.212.0/22 | AS17621 | — |
| 101.52.216.0/22 | AS17621 | — |
| 101.52.220.0/22 | AS17621 | — |
| 101.52.248.0/22 | AS17621 | — |
| 101.52.252.0/22 | AS17621 | — |
| 103.108.244.0/24 | AS17621 | — |
| 103.111.64.0/24 | AS17621 | — |
| 103.140.14.0/23 | AS17621 | — |
| 103.144.159.0/24 | AS17621 | — |
| 103.147.124.0/24 | AS17621 | — |
| 103.156.68.0/23 | AS17621 | — |
| 103.164.32.0/24 | AS17621 | — |
| 103.200.220.0/24 | AS17621 | — |
| 103.200.222.0/24 | AS17621 | — |
| 103.200.223.0/24 | AS17621 | — |
| 103.200.224.0/24 | AS17621 | — |
| 103.202.100.0/22 | AS17621 | — |
| 103.202.104.0/22 | AS17621 | — |
| 103.202.108.0/22 | AS17621 | — |
| 103.202.112.0/22 | AS17621 | — |
| 103.202.120.0/22 | AS17621 | — |
| 103.202.124.0/22 | AS17621 | — |
| 103.202.128.0/22 | AS17621 | — |
| 103.202.132.0/22 | AS17621 | — |
| 103.202.136.0/22 | AS17621 | — |
| 103.202.140.0/22 | AS17621 | — |
| 103.202.144.0/22 | AS17621 | — |
| 103.202.92.0/22 | AS17621 | — |
| 103.202.96.0/22 | AS17621 | — |
| 103.231.16.0/24 | AS17621 | — |
| 103.234.128.0/24 | AS17621 | — |
| 103.234.129.0/24 | AS17621 | — |
| 103.234.131.0/24 | AS17621 | — |
| 103.238.184.0/24 | AS17621 | — |
| 103.24.116.0/24 | AS17621 | — |
| 103.24.118.0/23 | AS17621 | — |
| 103.250.192.0/22 | AS17621 | — |
| 103.250.192.0/24 | AS17621 | — |
| 103.250.193.0/24 | AS17621 | — |
| 103.36.136.0/24 | AS17621 | — |
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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 AS17621 represent?
AS17621 is an autonomous system number used to identify an independently operated network. The current page associates it with CNCGROUP-SH China Unicom Shanghai network 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 AS17621 page?
They help explain the scale, interconnection depth, and route structure of AS17621. 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 AS17621?
The best next step is usually to return to a concrete IP landing page to see how a specific address maps into AS17621, 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.