Country
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ASN LANDING PAGE
AS21559
OSNET - OSNET
Last updated · Jul 20, 2026
Total prefixes
43
IPv4 prefixes
42
IPv6 prefixes
1
ASN summary
How to read the scale of AS21559
OSNET - OSNET currently reports 43 prefixes and 76 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?
OSNET - OSNET 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 AS21559 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
AS21559 ASN lookupAS21559 BGPAS21559 peersAS21559 prefixesAS21559 upstreamsOSNET - OSNET ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
AS271945
AS271945
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AS395502
AS395502
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AS395471
AS395471
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AS396502
AS396502
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AS399126
AS399126
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AS393573
AS393573
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AS46868
AS46868
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AS62931
AS62931
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AS40414
AS40414
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AS46941
AS46941
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AS393678
AS393678
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AS36435
AS36435
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AS54835
AS54835
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AS400154
AS400154
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AS399881
AS399881
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AS400354
AS400354
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AS397072
AS397072
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AS397399
AS397399
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AS63393
AS63393
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AS3838
AS3838
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AS398317
AS398317
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AS30294
AS30294
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AS397470
AS397470
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AS396899
AS396899
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AS10524
AS10524
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AS14534
AS14534
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AS397359
AS397359
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AS397598
AS397598
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AS46869
AS46869
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AS396377
AS396377
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AS399294
AS399294
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AS27213
AS27213
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AS21944
AS21944
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AS40880
AS40880
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AS6208
AS6208
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AS22109
AS22109
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AS22555
AS22555
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AS6939
AS6939
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Peers
AS6939
AS6939
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AS3257
AS3257
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AS174
AS174
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AS6762
AS6762
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AS12956
AS12956
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AS1299
AS1299
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AS3303
AS3303
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AS20080
AS20080
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AS13786
AS13786
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AS1828
AS1828
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AS52320
AS52320
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AS64126
AS64126
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AS19151
AS19151
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AS271253
AS271253
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AS4230
AS4230
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AS199524
AS199524
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AS61573
AS61573
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AS24482
AS24482
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AS36236
AS36236
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AS37468
AS37468
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AS286
AS286
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AS263237
AS263237
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AS137409
AS137409
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AS14840
AS14840
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AS263152
AS263152
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AS61568
AS61568
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AS9002
AS9002
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AS35280
AS35280
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AS37721
AS37721
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AS49544
AS49544
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AS51185
AS51185
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AS60171
AS60171
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AS264409
AS264409
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AS7195
AS7195
—
AS11367
AS11367
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AS393573
AS393573
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AS20326
AS20326
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AS23379
AS23379
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Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 104.218.240.0/22 | AS21559 | — |
| 104.218.241.0/24 | AS21559 | — |
| 104.238.192.0/22 | AS21559 | — |
| 104.238.232.0/23 | AS21559 | — |
| 149.18.21.0/24 | AS21559 | — |
| 149.18.39.0/24 | AS21559 | — |
| 154.64.208.0/21 | AS21559 | — |
| 154.64.216.0/21 | AS21559 | — |
| 167.94.224.0/23 | AS21559 | — |
| 167.94.225.0/24 | AS21559 | — |
| 172.93.2.0/23 | AS21559 | — |
| 173.239.206.0/24 | AS21559 | — |
| 173.239.228.0/24 | AS21559 | — |
| 192.228.98.0/23 | AS21559 | — |
| 192.254.109.0/24 | AS21559 | — |
| 192.254.96.0/20 | AS21559 | — |
| 192.254.96.0/24 | AS21559 | — |
| 192.254.97.0/24 | AS21559 | — |
| 198.52.240.0/22 | AS21559 | — |
| 198.52.240.0/24 | AS21559 | — |
| 198.52.241.0/24 | AS21559 | — |
| 199.116.62.0/24 | AS21559 | — |
| 200.5.16.0/20 | AS21559 | — |
| 200.5.22.0/24 | AS21559 | — |
| 200.5.23.0/24 | AS21559 | — |
| 204.77.10.0/23 | AS21559 | — |
| 204.77.11.0/24 | AS21559 | — |
| 208.81.58.0/23 | AS21559 | — |
| 208.81.59.0/24 | AS21559 | — |
| 2604:1cc0::/32 | AS21559 | — |
| 38.107.88.0/21 | AS21559 | — |
| 38.2.160.0/19 | AS21559 | — |
| 38.87.232.0/21 | AS21559 | — |
| 67.206.200.0/21 | AS21559 | — |
| 69.24.197.0/24 | AS21559 | — |
| 69.24.198.0/24 | AS21559 | — |
| 69.24.199.0/24 | AS21559 | — |
| 69.24.200.0/24 | AS21559 | — |
| 72.46.156.0/23 | AS21559 | — |
| 72.46.157.0/24 | AS21559 | — |
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Related lookups and next steps
Frequently asked questions about this ASN page
What does AS21559 represent?
AS21559 is an autonomous system number. The current source associates it with OSNET - OSNET 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 AS21559 page?
They help explain the scale, interconnection depth, and route structure of AS21559. 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 AS21559?
Open a concrete IP page to check how the address maps into AS21559, then compare the prefix, source labels, and query time. Verify operator or service claims with the relevant registry or network operator.
Related topics
BGP and ASN Basics Guide
Use real IP and ASN pages to understand ASNs, BGP prefixes, peers, upstreams, and downstreams, including the limits of each snapshot.
Routing Troubleshooting and Network Analysis
Build troubleshooting context from an IP, BGP prefix, ASN, and public network relationships without treating static route data as a packet path.
Cloud Network and ASN Comparison
Compare representative cloud and edge networks by ASN, announced prefixes, peers, upstreams, and downstreams without inferring a specific host or customer workload.