Country
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ASN LANDING PAGE
AS18403
FPT-VN - FPT Telecom Company
Last updated · Jul 20, 2026
Total prefixes
8123
IPv4 prefixes
4668
IPv6 prefixes
3455
ASN summary
How to read the scale of AS18403
FPT-VN - FPT Telecom Company currently reports 8123 prefixes and 80 upstream, downstream, or peer relationships. These counts describe the current dataset; they do not by themselves prove network quality, reach, or service use.
What can an ASN page answer?
An ASN page shows the public organization label, country or region, BGP prefixes, and available peer and upstream relationships. It adds network context but cannot confirm a website host, physical facility, security status, or service quality.
How should you read the organization and region fields?
FPT-VN - FPT Telecom Company is currently associated with an unknown region. These values come from public network sources and are useful lookup clues; an organization label, registration region, and actual service location may differ.
How should you verify the AS18403 result?
The page shows ASN data returned by the current upstream query; interpret it with the update time. Open representative IP pages from the same network and compare prefixes, source labels, and query times. Verify operator or service claims with the relevant registry or network operator.
How to verify this ASN result
AS18403 ASN lookupAS18403 BGPAS18403 peersAS18403 prefixesAS18403 upstreamsFPT-VN - FPT Telecom Company ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
AS149107
AS149107
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AS150895
AS150895
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AS21859
AS21859
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AS140810
AS140810
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AS45896
AS45896
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AS135067
AS135067
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AS131429
AS131429
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AS38244
AS38244
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AS140766
AS140766
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AS135918
AS135918
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AS151858
AS151858
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AS140825
AS140825
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AS150698
AS150698
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AS131423
AS131423
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AS135977
AS135977
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AS151872
AS151872
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AS45557
AS45557
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AS135967
AS135967
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AS24085
AS24085
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AS135964
AS135964
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AS45894
AS45894
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AS150828
AS150828
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AS56150
AS56150
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AS131353
AS131353
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AS139057
AS139057
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AS140807
AS140807
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AS140799
AS140799
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AS63760
AS63760
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AS45552
AS45552
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AS149096
AS149096
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AS140815
AS140815
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AS140822
AS140822
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AS149078
AS149078
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AS135912
AS135912
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AS131402
AS131402
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AS135932
AS135932
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AS131365
AS131365
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AS131366
AS131366
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AS63765
AS63765
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AS153391
AS153391
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Peers
AS4637
AS4637
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AS1299
AS1299
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AS5511
AS5511
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AS3356
AS3356
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AS4229
AS4229
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AS3491
AS3491
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AS2914
AS2914
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AS6939
AS6939
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AS6453
AS6453
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AS8220
AS8220
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AS7473
AS7473
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AS35280
AS35280
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AS5405
AS5405
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AS8966
AS8966
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AS34019
AS34019
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AS34927
AS34927
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AS34549
AS34549
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AS35625
AS35625
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AS49544
AS49544
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AS58453
AS58453
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AS3303
AS3303
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AS13786
AS13786
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AS8298
AS8298
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AS34177
AS34177
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AS137409
AS137409
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AS29691
AS29691
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AS8758
AS8758
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AS6057
AS6057
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AS39351
AS39351
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AS14840
AS14840
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AS25091
AS25091
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AS12859
AS12859
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AS41327
AS41327
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AS38008
AS38008
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AS24482
AS24482
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AS12779
AS12779
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AS24961
AS24961
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AS60068
AS60068
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AS13030
AS13030
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AS25152
AS25152
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Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 1.52.0.0/14 | AS18403 | — |
| 1.52.0.0/18 | AS18403 | — |
| 1.52.0.0/20 | AS18403 | — |
| 1.52.0.0/23 | AS18403 | — |
| 1.52.10.0/24 | AS18403 | — |
| 1.52.100.0/24 | AS18403 | — |
| 1.52.109.0/24 | AS18403 | — |
| 1.52.11.0/24 | AS18403 | — |
| 1.52.110.0/24 | AS18403 | — |
| 1.52.111.0/24 | AS18403 | — |
| 1.52.112.0/20 | AS18403 | — |
| 1.52.112.0/24 | AS18403 | — |
| 1.52.113.0/24 | AS18403 | — |
| 1.52.114.0/24 | AS18403 | — |
| 1.52.115.0/24 | AS18403 | — |
| 1.52.116.0/24 | AS18403 | — |
| 1.52.117.0/24 | AS18403 | — |
| 1.52.118.0/24 | AS18403 | — |
| 1.52.119.0/24 | AS18403 | — |
| 1.52.12.0/24 | AS18403 | — |
| 1.52.120.0/23 | AS18403 | — |
| 1.52.122.0/23 | AS18403 | — |
| 1.52.124.0/23 | AS18403 | — |
| 1.52.126.0/24 | AS18403 | — |
| 1.52.127.0/24 | AS18403 | — |
| 1.52.128.0/18 | AS18403 | — |
| 1.52.128.0/20 | AS18403 | — |
| 1.52.128.0/24 | AS18403 | — |
| 1.52.129.0/24 | AS18403 | — |
| 1.52.13.0/24 | AS18403 | — |
| 1.52.130.0/24 | AS18403 | — |
| 1.52.131.0/24 | AS18403 | — |
| 1.52.132.0/24 | AS18403 | — |
| 1.52.133.0/24 | AS18403 | — |
| 1.52.134.0/24 | AS18403 | — |
| 1.52.135.0/24 | AS18403 | — |
| 1.52.136.0/24 | AS18403 | — |
| 1.52.137.0/24 | AS18403 | — |
| 1.52.138.0/24 | AS18403 | — |
| 1.52.139.0/24 | AS18403 | — |
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Related lookups and next steps
Frequently asked questions about this ASN page
What does AS18403 represent?
AS18403 is an autonomous system number. The current source associates it with FPT-VN - FPT Telecom Company and the region field an unknown region; those values add network context but do not prove a specific service, physical location, or quality level.
What are peers, upstreams, and prefixes useful for on the AS18403 page?
They help explain the scale, interconnection depth, and route structure of AS18403. 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 AS18403?
Open a concrete IP page to check how the address maps into AS18403, then compare the prefix, source labels, and query time. Verify operator or service claims with the relevant registry or network operator.
Related topics
BGP and ASN Basics Guide
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Routing Troubleshooting and Network Analysis
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Cloud Network and ASN Comparison
Compare representative cloud and edge networks by ASN, announced prefixes, peers, upstreams, and downstreams without inferring a specific host or customer workload.