Country
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ASN LANDING PAGE
AS45903
CMCTELECOM-VN CMC Telecom Infrastructure Company
Last updated · Apr 4, 2026
Total prefixes
489
IPv4 prefixes
349
IPv6 prefixes
140
ASN summary
How to read the scale of AS45903
CMCTELECOM-VN CMC Telecom Infrastructure Company currently shows 489 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 AS45903?
CMCTELECOM-VN CMC Telecom Infrastructure Company 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 AS45903 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
AS45903 ASN lookupAS45903 BGPAS45903 peersAS45903 prefixesAS45903 upstreamsCMCTELECOM-VN CMC Telecom Infrastructure Company ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
AS38732
AS38732
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AS38733
AS38733
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AS45538
AS45538
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AS135983
AS135983
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AS55309
AS55309
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AS38247
AS38247
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AS131127
AS131127
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AS24173
AS24173
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AS38244
AS38244
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AS45543
AS45543
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AS55318
AS55318
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AS63741
AS63741
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AS396986
AS396986
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AS56147
AS56147
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AS131421
AS131421
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AS131398
AS131398
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AS55313
AS55313
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AS56150
AS56150
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AS38253
AS38253
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AS140745
AS140745
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AS140765
AS140765
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AS140810
AS140810
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AS150837
AS150837
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AS135947
AS135947
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AS63731
AS63731
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AS154552
AS154552
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AS152940
AS152940
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AS55306
AS55306
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AS135938
AS135938
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AS38726
AS38726
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AS151868
AS151868
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AS139341
AS139341
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AS154144
AS154144
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AS56144
AS56144
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AS131436
AS131436
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AS63743
AS63743
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AS153013
AS153013
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AS131364
AS131364
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AS138995
AS138995
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AS131351
AS131351
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Peers
AS9304
AS9304
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AS15412
AS15412
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AS3491
AS3491
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AS2914
AS2914
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AS23764
AS23764
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AS3356
AS3356
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AS21859
AS21859
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AS5511
AS5511
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AS7473
AS7473
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AS6939
AS6939
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AS8220
AS8220
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AS4766
AS4766
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AS58453
AS58453
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AS703
AS703
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AS4635
AS4635
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AS24482
AS24482
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AS8298
AS8298
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AS35280
AS35280
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AS5405
AS5405
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AS137409
AS137409
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AS34549
AS34549
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AS49544
AS49544
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AS8758
AS8758
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AS34019
AS34019
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AS9002
AS9002
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AS20485
AS20485
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AS36236
AS36236
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AS18106
AS18106
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AS29691
AS29691
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AS25091
AS25091
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AS1103
AS1103
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AS34927
AS34927
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AS12779
AS12779
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AS3214
AS3214
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AS199524
AS199524
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AS34177
AS34177
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AS24173
AS24173
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AS37721
AS37721
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AS6057
AS6057
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AS52320
AS52320
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Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 101.99.0.0/21 | AS45903 | — |
| 101.99.0.0/23 | AS45903 | — |
| 101.99.1.0/24 | AS45903 | — |
| 101.99.10.0/24 | AS45903 | — |
| 101.99.11.0/24 | AS45903 | — |
| 101.99.12.0/22 | AS45903 | — |
| 101.99.12.0/23 | AS45903 | — |
| 101.99.12.0/24 | AS45903 | — |
| 101.99.13.0/24 | AS45903 | — |
| 101.99.14.0/24 | AS45903 | — |
| 101.99.15.0/24 | AS45903 | — |
| 101.99.16.0/21 | AS45903 | — |
| 101.99.16.0/22 | AS45903 | — |
| 101.99.16.0/23 | AS45903 | — |
| 101.99.17.0/24 | AS45903 | — |
| 101.99.18.0/23 | AS45903 | — |
| 101.99.2.0/23 | AS45903 | — |
| 101.99.2.0/24 | AS45903 | — |
| 101.99.20.0/23 | AS45903 | — |
| 101.99.20.0/24 | AS45903 | — |
| 101.99.21.0/24 | AS45903 | — |
| 101.99.22.0/24 | AS45903 | — |
| 101.99.23.0/24 | AS45903 | — |
| 101.99.24.0/21 | AS45903 | — |
| 101.99.24.0/23 | AS45903 | — |
| 101.99.24.0/24 | AS45903 | — |
| 101.99.25.0/24 | AS45903 | — |
| 101.99.26.0/23 | AS45903 | — |
| 101.99.26.0/24 | AS45903 | — |
| 101.99.27.0/24 | AS45903 | — |
| 101.99.28.0/23 | AS45903 | — |
| 101.99.28.0/24 | AS45903 | — |
| 101.99.29.0/24 | AS45903 | — |
| 101.99.30.0/23 | AS45903 | — |
| 101.99.31.0/24 | AS45903 | — |
| 101.99.32.0/21 | AS45903 | — |
| 101.99.32.0/23 | AS45903 | — |
| 101.99.34.0/24 | AS45903 | — |
| 101.99.35.0/24 | AS45903 | — |
| 101.99.36.0/24 | AS45903 | — |
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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 AS45903 represent?
AS45903 is an autonomous system number used to identify an independently operated network. The current page associates it with CMCTELECOM-VN CMC Telecom Infrastructure Company 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 AS45903 page?
They help explain the scale, interconnection depth, and route structure of AS45903. 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 AS45903?
The best next step is usually to return to a concrete IP landing page to see how a specific address maps into AS45903, 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.