Country
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ASN LANDING PAGE
AS43037
SEZNAM-CZ - Seznam.cz, a.s.
Last updated · Apr 4, 2026
Total prefixes
12
IPv4 prefixes
6
IPv6 prefixes
6
ASN summary
How to read the scale of AS43037
SEZNAM-CZ - Seznam.cz, a.s. currently shows 12 prefixes and 41 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 AS43037?
SEZNAM-CZ - Seznam.cz, a.s. 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 AS43037 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
AS43037 ASN lookupAS43037 BGPAS43037 peersAS43037 prefixesAS43037 upstreamsSEZNAM-CZ - Seznam.cz, a.s. ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
Peers
AS5610
AS5610
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AS6939
AS6939
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AS29208
AS29208
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AS9002
AS9002
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AS5405
AS5405
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AS34549
AS34549
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AS35280
AS35280
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AS3214
AS3214
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AS8758
AS8758
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AS20562
AS20562
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AS20764
AS20764
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AS29632
AS29632
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AS34019
AS34019
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AS35625
AS35625
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AS6057
AS6057
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AS8283
AS8283
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AS12779
AS12779
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AS12859
AS12859
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AS20485
AS20485
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AS25091
AS25091
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AS29075
AS29075
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AS29691
AS29691
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AS34177
AS34177
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AS34927
AS34927
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AS37100
AS37100
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AS37468
AS37468
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AS39351
AS39351
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AS41327
AS41327
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AS48362
AS48362
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AS52320
AS52320
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AS137409
AS137409
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AS8218
AS8218
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AS8298
AS8298
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AS14840
AS14840
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AS30781
AS30781
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AS33891
AS33891
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AS553
AS553
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AS559
AS559
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AS1764
AS1764
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AS1828
AS1828
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Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 185.66.188.0/22 | AS43037 | — |
| 2a02:598:2::/48 | AS43037 | — |
| 2a02:598:3333::/48 | AS43037 | — |
| 2a02:598:4444::/48 | AS43037 | — |
| 2a02:598::/32 | AS43037 | — |
| 2a02:598:a::/48 | AS43037 | — |
| 2a02:598:b::/48 | AS43037 | — |
| 77.75.72.0/23 | AS43037 | — |
| 77.75.74.0/24 | AS43037 | — |
| 77.75.75.0/24 | AS43037 | — |
| 77.75.76.0/23 | AS43037 | — |
| 77.75.78.0/23 | AS43037 | — |
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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 AS43037 represent?
AS43037 is an autonomous system number used to identify an independently operated network. The current page associates it with SEZNAM-CZ - Seznam.cz, a.s. 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 AS43037 page?
They help explain the scale, interconnection depth, and route structure of AS43037. 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 AS43037?
The best next step is usually to return to a concrete IP landing page to see how a specific address maps into AS43037, 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.