Country
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ASN LANDING PAGE
AS3300
BT - British Telecommunications PLC
Last updated · Apr 4, 2026
Total prefixes
151
IPv4 prefixes
122
IPv6 prefixes
29
ASN summary
How to read the scale of AS3300
BT - British Telecommunications PLC currently shows 151 prefixes and 62 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 AS3300?
BT - British Telecommunications PLC 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 AS3300 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
AS3300 ASN lookupAS3300 BGPAS3300 peersAS3300 prefixesAS3300 upstreamsBT - British Telecommunications PLC ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
AS7246
AS7246
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AS22683
AS22683
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AS136767
AS136767
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AS40659
AS40659
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AS212565
AS212565
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AS45187
AS45187
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AS399449
AS399449
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AS19812
AS19812
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AS78
AS78
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AS133782
AS133782
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AS26478
AS26478
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AS27000
AS27000
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AS141399
AS141399
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AS72
AS72
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AS48647
AS48647
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AS393493
AS393493
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AS18872
AS18872
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AS6220
AS6220
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AS55290
AS55290
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AS40126
AS40126
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AS26380
AS26380
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AS12200
AS12200
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Peers
AS1299
AS1299
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AS4637
AS4637
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AS2914
AS2914
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AS4657
AS4657
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AS3491
AS3491
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AS6939
AS6939
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AS9002
AS9002
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AS6762
AS6762
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AS30844
AS30844
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AS6461
AS6461
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AS3303
AS3303
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AS33891
AS33891
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AS8220
AS8220
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AS2497
AS2497
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AS37468
AS37468
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AS18106
AS18106
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AS199524
AS199524
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AS1828
AS1828
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AS49544
AS49544
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AS35280
AS35280
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AS14907
AS14907
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AS36236
AS36236
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AS16735
AS16735
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AS4230
AS4230
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AS14840
AS14840
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AS1403
AS1403
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AS19151
AS19151
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AS22652
AS22652
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AS52320
AS52320
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AS9304
AS9304
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AS45489
AS45489
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AS55720
AS55720
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AS2518
AS2518
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AS23764
AS23764
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AS7713
AS7713
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AS4635
AS4635
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AS24482
AS24482
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AS8359
AS8359
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AS31713
AS31713
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AS57304
AS57304
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Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 136.238.168.0/24 | AS3300 | — |
| 136.238.185.0/24 | AS3300 | — |
| 136.238.187.0/24 | AS3300 | — |
| 136.238.229.0/24 | AS3300 | — |
| 136.238.232.0/24 | AS3300 | — |
| 136.238.238.0/24 | AS3300 | — |
| 136.238.239.0/24 | AS3300 | — |
| 136.238.240.0/24 | AS3300 | — |
| 136.238.241.0/24 | AS3300 | — |
| 136.238.243.0/24 | AS3300 | — |
| 185.249.5.0/24 | AS3300 | — |
| 185.249.6.0/24 | AS3300 | — |
| 192.157.130.0/23 | AS3300 | — |
| 192.157.132.0/22 | AS3300 | — |
| 192.157.136.0/21 | AS3300 | — |
| 192.157.144.0/20 | AS3300 | — |
| 192.157.160.0/23 | AS3300 | — |
| 192.237.64.0/18 | AS3300 | — |
| 192.92.18.0/24 | AS3300 | — |
| 192.92.19.0/24 | AS3300 | — |
| 192.92.20.0/22 | AS3300 | — |
| 192.92.24.0/21 | AS3300 | — |
| 192.92.32.0/19 | AS3300 | — |
| 192.92.80.0/23 | AS3300 | — |
| 192.92.82.0/24 | AS3300 | — |
| 194.33.52.0/24 | AS3300 | — |
| 195.206.69.0/24 | AS3300 | — |
| 195.206.70.0/24 | AS3300 | — |
| 198.137.75.0/24 | AS3300 | — |
| 198.178.237.0/24 | AS3300 | — |
| 198.178.239.0/24 | AS3300 | — |
| 198.207.127.0/24 | AS3300 | — |
| 198.207.64.0/18 | AS3300 | — |
| 198.207.64.0/22 | AS3300 | — |
| 198.207.67.0/24 | AS3300 | — |
| 198.207.72.0/22 | AS3300 | — |
| 198.207.74.0/24 | AS3300 | — |
| 198.207.75.0/24 | AS3300 | — |
| 198.207.76.0/22 | AS3300 | — |
| 198.207.78.0/24 | AS3300 | — |
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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 AS3300 represent?
AS3300 is an autonomous system number used to identify an independently operated network. The current page associates it with BT - British Telecommunications PLC 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 AS3300 page?
They help explain the scale, interconnection depth, and route structure of AS3300. 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 AS3300?
The best next step is usually to return to a concrete IP landing page to see how a specific address maps into AS3300, 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.