Country
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ASN LANDING PAGE
AS28580
Cilnet Comunicacao e Informatica S.A.
Last updated · Apr 4, 2026
Total prefixes
318
IPv4 prefixes
293
IPv6 prefixes
25
ASN summary
How to read the scale of AS28580
Cilnet Comunicacao e Informatica S.A. currently shows 318 prefixes and 43 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 AS28580?
Cilnet Comunicacao e Informatica S.A. 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 AS28580 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
AS28580 ASN lookupAS28580 BGPAS28580 peersAS28580 prefixesAS28580 upstreamsCilnet Comunicacao e Informatica S.A. ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
Peers
AS37468
AS37468
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AS3356
AS3356
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AS28649
AS28649
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AS6939
AS6939
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AS35280
AS35280
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AS6057
AS6057
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AS28634
AS28634
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AS36236
AS36236
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AS199524
AS199524
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AS262427
AS262427
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AS263152
AS263152
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AS263237
AS263237
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AS264479
AS264479
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AS271253
AS271253
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AS6424
AS6424
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AS22548
AS22548
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AS24482
AS24482
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AS29049
AS29049
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AS39120
AS39120
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AS51185
AS51185
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AS60503
AS60503
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AS198150
AS198150
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AS61573
AS61573
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AS52320
AS52320
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AS14840
AS14840
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AS28624
AS28624
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AS52863
AS52863
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AS52873
AS52873
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AS7195
AS7195
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AS7713
AS7713
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AS37721
AS37721
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AS52887
AS52887
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AS61855
AS61855
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AS266462
AS266462
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AS267976
AS267976
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AS268989
AS268989
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Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 138.0.180.0/22 | AS28580 | — |
| 138.0.180.0/23 | AS28580 | — |
| 138.0.180.0/24 | AS28580 | — |
| 138.0.181.0/24 | AS28580 | — |
| 138.0.182.0/23 | AS28580 | — |
| 138.0.182.0/24 | AS28580 | — |
| 138.0.183.0/24 | AS28580 | — |
| 138.122.68.0/22 | AS28580 | — |
| 138.122.68.0/23 | AS28580 | — |
| 138.122.68.0/24 | AS28580 | — |
| 138.122.69.0/24 | AS28580 | — |
| 138.122.70.0/23 | AS28580 | — |
| 138.122.70.0/24 | AS28580 | — |
| 138.122.71.0/24 | AS28580 | — |
| 138.186.180.0/22 | AS28580 | — |
| 138.186.180.0/23 | AS28580 | — |
| 138.186.180.0/24 | AS28580 | — |
| 138.186.181.0/24 | AS28580 | — |
| 138.186.182.0/23 | AS28580 | — |
| 138.186.182.0/24 | AS28580 | — |
| 138.186.183.0/24 | AS28580 | — |
| 143.0.232.0/22 | AS28580 | — |
| 168.194.228.0/22 | AS28580 | — |
| 168.194.228.0/23 | AS28580 | — |
| 168.194.228.0/24 | AS28580 | — |
| 168.194.229.0/24 | AS28580 | — |
| 168.194.230.0/23 | AS28580 | — |
| 168.194.230.0/24 | AS28580 | — |
| 168.194.231.0/24 | AS28580 | — |
| 168.194.4.0/22 | AS28580 | — |
| 168.194.4.0/23 | AS28580 | — |
| 168.194.4.0/24 | AS28580 | — |
| 168.194.5.0/24 | AS28580 | — |
| 168.194.6.0/23 | AS28580 | — |
| 168.194.6.0/24 | AS28580 | — |
| 168.194.7.0/24 | AS28580 | — |
| 168.90.184.0/22 | AS28580 | — |
| 168.90.184.0/23 | AS28580 | — |
| 168.90.184.0/24 | AS28580 | — |
| 168.90.185.0/24 | AS28580 | — |
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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 AS28580 represent?
AS28580 is an autonomous system number used to identify an independently operated network. The current page associates it with Cilnet Comunicacao e Informatica S.A. 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 AS28580 page?
They help explain the scale, interconnection depth, and route structure of AS28580. 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 AS28580?
The best next step is usually to return to a concrete IP landing page to see how a specific address maps into AS28580, 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.