Country
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ASN LANDING PAGE
AS21574
Century Telecom Ltda
Last updated · Apr 4, 2026
Total prefixes
6
IPv4 prefixes
5
IPv6 prefixes
1
ASN summary
How to read the scale of AS21574
Century Telecom Ltda currently shows 6 prefixes and 80 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 AS21574?
Century Telecom Ltda 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 AS21574 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
AS21574 ASN lookupAS21574 BGPAS21574 peersAS21574 prefixesAS21574 upstreamsCentury 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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AS264014
AS264014
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AS52631
AS52631
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AS52907
AS52907
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AS269084
AS269084
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AS264385
AS264385
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AS262387
AS262387
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AS263475
AS263475
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AS266260
AS266260
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AS53196
AS53196
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AS262566
AS262566
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AS28296
AS28296
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AS28133
AS28133
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AS264421
AS264421
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AS273590
AS273590
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AS273350
AS273350
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AS268229
AS268229
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AS271338
AS271338
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AS270897
AS270897
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AS271062
AS271062
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AS270837
AS270837
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AS268725
AS268725
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AS272487
AS272487
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AS263356
AS263356
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AS52712
AS52712
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AS265497
AS265497
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AS271251
AS271251
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AS262674
AS262674
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AS272479
AS272479
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AS265437
AS265437
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AS262624
AS262624
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AS273714
AS273714
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AS267008
AS267008
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AS264374
AS264374
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AS266149
AS266149
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AS269248
AS269248
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AS274496
AS274496
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AS61945
AS61945
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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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AS16735
AS16735
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AS34019
AS34019
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AS35280
AS35280
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AS5405
AS5405
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AS34549
AS34549
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AS58057
AS58057
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AS8298
AS8298
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AS8758
AS8758
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AS39351
AS39351
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AS9002
AS9002
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AS37468
AS37468
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AS35625
AS35625
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AS25091
AS25091
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AS34177
AS34177
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AS29632
AS29632
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AS20764
AS20764
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AS29691
AS29691
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AS3214
AS3214
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AS34927
AS34927
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AS29075
AS29075
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AS48362
AS48362
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AS24482
AS24482
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AS199524
AS199524
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AS209823
AS209823
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AS12779
AS12779
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AS24961
AS24961
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AS37100
AS37100
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AS49544
AS49544
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AS1828
AS1828
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AS6057
AS6057
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AS553
AS553
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AS25160
AS25160
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AS31510
AS31510
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AS31027
AS31027
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AS199938
AS199938
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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 | — |
| 187.1.178.0/24 | AS21574 | — |
| 200.169.0.0/20 | AS21574 | — |
| 2804:23ec::/32 | AS21574 | — |
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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 AS21574 represent?
AS21574 is an autonomous system number used to identify an independently operated network. The current page associates it with Century Telecom Ltda 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 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?
The best next step is usually to return to a concrete IP landing page to see how a specific address maps into AS21574, 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.