Country
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ASN LANDING PAGE
AS17621
CNCGROUP-SH - China Unicom Shanghai network
Last updated · Jul 20, 2026
Total prefixes
802
IPv4 prefixes
380
IPv6 prefixes
422
ASN summary
How to read the scale of AS17621
CNCGROUP-SH - China Unicom Shanghai network currently reports 802 prefixes and 42 upstream, downstream, or peer relationships. These counts describe the current dataset; they do not by themselves prove network quality, reach, or service use.
What can an ASN page answer?
An ASN page shows the public organization label, country or region, BGP prefixes, and available peer and upstream relationships. It adds network context but cannot confirm a website host, physical facility, security status, or service quality.
How should you read the organization and region fields?
CNCGROUP-SH - China Unicom Shanghai network is currently associated with an unknown region. These values come from public network sources and are useful lookup clues; an organization label, registration region, and actual service location may differ.
How should you verify the AS17621 result?
The page shows ASN data returned by the current upstream query; interpret it with the update time. Open representative IP pages from the same network and compare prefixes, source labels, and query times. Verify operator or service claims with the relevant registry or network operator.
How to verify this ASN result
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
—
AS59083
AS59083
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AS45079
AS45079
—
AS10100
AS10100
—
AS63570
AS63570
—
AS109
AS109
—
AS9809
AS9809
—
AS24141
AS24141
—
AS137759
AS137759
—
AS58850
AS58850
—
AS7609
AS7609
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AS146842
AS146842
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AS23853
AS23853
—
AS56006
AS56006
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AS139148
AS139148
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AS151247
AS151247
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AS56013
AS56013
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AS139138
AS139138
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AS38375
AS38375
—
AS137746
AS137746
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AS137758
AS137758
—
AS38381
AS38381
—
AS17739
AS17739
—
AS139184
AS139184
—
AS17775
AS17775
—
AS135432
AS135432
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AS59019
AS59019
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AS55992
AS55992
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AS63538
AS63538
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AS37965
AS37965
—
AS45110
AS45110
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AS58593
AS58593
—
AS59078
AS59078
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AS137715
AS137715
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AS45073
AS45073
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AS55996
AS55996
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AS55956
AS55956
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AS18244
AS18244
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AS45061
AS45061
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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 | — |
| 103.164.32.0/24 | 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 | — |
| 103.200.232.0/24 | 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
Frequently asked questions about this ASN page
What does AS17621 represent?
AS17621 is an autonomous system number. The current source associates it with CNCGROUP-SH - China Unicom Shanghai network and the region field an unknown region; those values add network context but do not prove a specific service, physical location, or quality level.
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?
Open a concrete IP page to check how the address maps into AS17621, then compare the prefix, source labels, and query time. Verify operator or service claims with the relevant registry or network operator.
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