Country
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ASN LANDING PAGE
AS21574
AS21574 - Century Telecom Ltda
Last updated · Jul 20, 2026
Total prefixes
7
IPv4 prefixes
6
IPv6 prefixes
1
ASN summary
How to read the scale of AS21574
AS21574 - Century Telecom Ltda currently reports 7 prefixes and 80 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?
AS21574 - Century Telecom Ltda 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 AS21574 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
AS21574 ASN lookupAS21574 BGPAS21574 peersAS21574 prefixesAS21574 upstreamsAS21574 - Century Telecom Ltda ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
AS52928
AS52928
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AS273663
AS273663
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AS61712
AS61712
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AS28296
AS28296
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AS263475
AS263475
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AS52631
AS52631
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AS266260
AS266260
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AS264385
AS264385
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AS273350
AS273350
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AS52907
AS52907
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AS262566
AS262566
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AS269084
AS269084
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AS53196
AS53196
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AS52532
AS52532
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AS52712
AS52712
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AS262387
AS262387
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AS271338
AS271338
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AS268229
AS268229
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AS270837
AS270837
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AS270897
AS270897
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AS265497
AS265497
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AS272753
AS272753
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AS263356
AS263356
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AS272487
AS272487
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AS271251
AS271251
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AS265424
AS265424
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AS264455
AS264455
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AS274795
AS274795
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AS269248
AS269248
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AS274798
AS274798
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AS267008
AS267008
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AS271072
AS271072
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AS272479
AS272479
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AS269199
AS269199
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AS262624
AS262624
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AS61945
AS61945
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AS264374
AS264374
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AS271049
AS271049
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AS267070
AS267070
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AS267497
AS267497
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Peers
AS263444
AS263444
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AS7195
AS7195
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AS3356
AS3356
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AS1031
AS1031
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AS6939
AS6939
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AS174
AS174
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AS16735
AS16735
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AS34549
AS34549
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AS34019
AS34019
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AS5405
AS5405
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AS35280
AS35280
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AS35625
AS35625
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AS25091
AS25091
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AS34177
AS34177
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AS29691
AS29691
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AS39351
AS39351
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AS8298
AS8298
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AS29632
AS29632
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AS29075
AS29075
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AS24961
AS24961
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AS34927
AS34927
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AS8758
AS8758
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AS48362
AS48362
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AS20764
AS20764
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AS12779
AS12779
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AS47147
AS47147
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AS24482
AS24482
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AS199524
AS199524
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AS25160
AS25160
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AS35360
AS35360
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AS553
AS553
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AS31510
AS31510
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AS42541
AS42541
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AS199938
AS199938
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AS31027
AS31027
—
AS58057
AS58057
—
AS559
AS559
—
AS64475
AS64475
—
AS209823
AS209823
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AS58299
AS58299
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Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 168.227.200.0/22 | AS21574 | — |
| 186.249.224.0/20 | AS21574 | — |
| 187.1.176.0/20 | AS21574 | — |
| 187.1.176.0/24 | AS21574 | — |
| 187.1.178.0/24 | AS21574 | — |
| 200.169.0.0/20 | AS21574 | — |
| 2804:23ec::/32 | AS21574 | — |
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Related lookups and next steps
Frequently asked questions about this ASN page
What does AS21574 represent?
AS21574 is an autonomous system number. The current source associates it with AS21574 - Century Telecom Ltda 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 AS21574 page?
They help explain the scale, interconnection depth, and route structure of AS21574. 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 AS21574?
Open a concrete IP page to check how the address maps into AS21574, 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
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