Country
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ASN LANDING PAGE
AS39521
TNGNET TNGNET B.V.
Last updated · Jul 20, 2026
Total prefixes
51
IPv4 prefixes
47
IPv6 prefixes
4
ASN summary
How to read the scale of AS39521
TNGNET TNGNET B.V. currently reports 51 prefixes and 47 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?
TNGNET TNGNET B.V. 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 AS39521 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
AS39521 ASN lookupAS39521 BGPAS39521 peersAS39521 prefixesAS39521 upstreamsTNGNET TNGNET B.V. ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
Peers
AS6939
AS6939
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AS61138
AS61138
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AS6206
AS6206
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AS5511
AS5511
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AS174
AS174
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AS6830
AS6830
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AS50673
AS50673
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AS33891
AS33891
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AS34019
AS34019
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AS5405
AS5405
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AS6057
AS6057
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AS8298
AS8298
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AS34177
AS34177
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AS35280
AS35280
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AS47147
AS47147
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AS49434
AS49434
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AS25091
AS25091
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AS50304
AS50304
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AS50629
AS50629
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AS137409
AS137409
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AS3214
AS3214
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AS3399
AS3399
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AS6424
AS6424
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AS24482
AS24482
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AS212635
AS212635
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AS559
AS559
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AS1764
AS1764
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AS3170
AS3170
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AS8218
AS8218
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AS12637
AS12637
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AS12779
AS12779
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AS15547
AS15547
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AS15605
AS15605
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AS24961
AS24961
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AS25160
AS25160
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AS25220
AS25220
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AS29140
AS29140
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AS31027
AS31027
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AS34288
AS34288
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AS39122
AS39122
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Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 143.20.104.0/24 | AS39521 | — |
| 143.20.124.0/24 | AS39521 | — |
| 143.20.125.0/24 | AS39521 | — |
| 143.20.54.0/24 | AS39521 | — |
| 143.20.6.0/24 | AS39521 | — |
| 143.20.61.0/24 | AS39521 | — |
| 143.20.62.0/24 | AS39521 | — |
| 167.148.40.0/24 | AS39521 | — |
| 185.144.56.0/22 | AS39521 | — |
| 188.191.49.0/24 | AS39521 | — |
| 188.191.50.0/24 | AS39521 | — |
| 188.191.51.0/24 | AS39521 | — |
| 212.107.4.0/22 | AS39521 | — |
| 217.194.153.0/24 | AS39521 | — |
| 2a05:e4c0::/32 | AS39521 | — |
| 2a05:e4c1::/32 | AS39521 | — |
| 2a05:e4c7::/36 | AS39521 | — |
| 2a07:3bc0::/29 | AS39521 | — |
| 45.10.16.0/24 | AS39521 | — |
| 45.10.17.0/24 | AS39521 | — |
| 45.10.18.0/24 | AS39521 | — |
| 45.130.100.0/22 | AS39521 | — |
| 45.88.5.0/24 | AS39521 | — |
| 45.88.6.0/24 | AS39521 | — |
| 45.88.7.0/24 | AS39521 | — |
| 45.95.40.0/24 | AS39521 | — |
| 45.95.41.0/24 | AS39521 | — |
| 5.22.204.0/22 | AS39521 | — |
| 68.164.0.0/22 | AS39521 | — |
| 68.165.140.0/22 | AS39521 | — |
| 68.165.176.0/22 | AS39521 | — |
| 68.165.208.0/22 | AS39521 | — |
| 72.244.124.0/22 | AS39521 | — |
| 74.0.132.0/22 | AS39521 | — |
| 74.0.160.0/22 | AS39521 | — |
| 74.0.200.0/22 | AS39521 | — |
| 74.0.248.0/22 | AS39521 | — |
| 82.21.112.0/24 | AS39521 | — |
| 82.21.116.0/24 | AS39521 | — |
| 82.21.126.0/24 | AS39521 | — |
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Related lookups and next steps
Frequently asked questions about this ASN page
What does AS39521 represent?
AS39521 is an autonomous system number. The current source associates it with TNGNET TNGNET B.V. 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 AS39521 page?
They help explain the scale, interconnection depth, and route structure of AS39521. 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 AS39521?
Open a concrete IP page to check how the address maps into AS39521, then compare the prefix, source labels, and query time. Verify operator or service claims with the relevant registry or network operator.
Related topics
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Routing Troubleshooting and Network Analysis
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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.