Country
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ASN LANDING PAGE
AS21738
ROZINT - Rozint
Last updated · Apr 4, 2026
Total prefixes
12
IPv4 prefixes
6
IPv6 prefixes
6
ASN summary
How to read the scale of AS21738
ROZINT - Rozint currently shows 12 prefixes and 42 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 AS21738?
ROZINT - Rozint 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 AS21738 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
AS21738 ASN lookupAS21738 BGPAS21738 peersAS21738 prefixesAS21738 upstreamsROZINT - Rozint ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
AS401710
AS401710
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AS402247
AS402247
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AS53388
AS53388
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AS54852
AS54852
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AS14923
AS14923
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AS216242
AS216242
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AS151349
AS151349
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AS200242
AS200242
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AS216324
AS216324
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AS270142
AS270142
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AS30114
AS30114
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AS216052
AS216052
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AS26006
AS26006
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AS399542
AS399542
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AS214430
AS214430
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AS58057
AS58057
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AS200160
AS200160
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AS23459
AS23459
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AS30690
AS30690
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AS213880
AS213880
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AS401859
AS401859
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AS54148
AS54148
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AS53899
AS53899
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AS216107
AS216107
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AS207852
AS207852
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AS147039
AS147039
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AS212895
AS212895
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AS209199
AS209199
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AS202340
AS202340
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AS210250
AS210250
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AS328112
AS328112
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Peers
Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 140.235.156.0/24 | AS21738 | — |
| 2.59.255.0/24 | AS21738 | — |
| 216.40.92.0/22 | AS21738 | — |
| 23.150.40.0/24 | AS21738 | — |
| 23.150.41.0/24 | AS21738 | — |
| 2602:2b7:40::/48 | AS21738 | — |
| 2602:2b7:55::/48 | AS21738 | — |
| 2602:2b7:600::/48 | AS21738 | — |
| 2602:2b7:d00::/40 | AS21738 | — |
| 2602:2b7:e1::/48 | AS21738 | — |
| 2602:2b7:e2::/48 | AS21738 | — |
| 43.255.189.0/24 | AS21738 | — |
Related ASN pages
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AS13335 · Cloudflare
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AS8075 · Microsoft
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AS16509 · Amazon
A useful ASN landing page for understanding AWS and large cloud-network ownership.
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 AS21738 represent?
AS21738 is an autonomous system number used to identify an independently operated network. The current page associates it with ROZINT - Rozint 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 AS21738 page?
They help explain the scale, interconnection depth, and route structure of AS21738. 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 AS21738?
The best next step is usually to return to a concrete IP landing page to see how a specific address maps into AS21738, 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.