Country
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ASN LANDING PAGE
AS21928
T-MOBILE-AS21928 - T-Mobile USA
Last updated · Apr 4, 2026
Total prefixes
577
IPv4 prefixes
323
IPv6 prefixes
254
ASN summary
How to read the scale of AS21928
T-MOBILE-AS21928 - T-Mobile USA currently shows 577 prefixes and 43 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 AS21928?
T-MOBILE-AS21928 - T-Mobile USA 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 AS21928 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
AS21928 ASN lookupAS21928 BGPAS21928 peersAS21928 prefixesAS21928 upstreamsT-MOBILE-AS21928 - T-Mobile USA ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
Peers
AS6461
AS6461
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AS3356
AS3356
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AS174
AS174
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AS6939
AS6939
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AS58453
AS58453
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AS9002
AS9002
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AS137409
AS137409
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AS35280
AS35280
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AS37468
AS37468
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AS60068
AS60068
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AS4230
AS4230
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AS6057
AS6057
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AS7922
AS7922
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AS9505
AS9505
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AS20205
AS20205
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AS33891
AS33891
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AS49544
AS49544
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AS1828
AS1828
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AS7195
AS7195
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AS13786
AS13786
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AS18678
AS18678
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AS45489
AS45489
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AS52025
AS52025
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AS64289
AS64289
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AS1031
AS1031
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AS7575
AS7575
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AS9304
AS9304
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AS17639
AS17639
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AS18106
AS18106
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AS19151
AS19151
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AS20080
AS20080
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AS21700
AS21700
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AS24482
AS24482
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AS32621
AS32621
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AS34927
AS34927
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AS36236
AS36236
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AS39120
AS39120
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AS41327
AS41327
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AS51185
AS51185
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AS52320
AS52320
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Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 100.128.0.0/9 | AS21928 | — |
| 104.152.20.0/22 | AS21928 | — |
| 162.160.0.0/11 | AS21928 | — |
| 162.173.20.0/24 | AS21928 | — |
| 162.173.24.0/21 | AS21928 | — |
| 162.173.32.0/21 | AS21928 | — |
| 162.173.40.0/21 | AS21928 | — |
| 162.173.48.0/21 | AS21928 | — |
| 162.184.0.0/15 | AS21928 | — |
| 162.186.0.0/17 | AS21928 | — |
| 162.186.128.0/17 | AS21928 | — |
| 162.187.0.0/17 | AS21928 | — |
| 162.187.128.0/17 | AS21928 | — |
| 162.190.0.0/16 | AS21928 | — |
| 162.191.0.0/16 | AS21928 | — |
| 167.20.0.0/16 | AS21928 | — |
| 168.73.0.0/17 | AS21928 | — |
| 168.73.128.0/17 | AS21928 | — |
| 170.206.0.0/17 | AS21928 | — |
| 170.206.128.0/17 | AS21928 | — |
| 172.32.0.0/11 | AS21928 | — |
| 172.56.0.0/16 | AS21928 | — |
| 172.56.0.0/23 | AS21928 | — |
| 172.56.10.0/23 | AS21928 | — |
| 172.56.100.0/23 | AS21928 | — |
| 172.56.102.0/23 | AS21928 | — |
| 172.56.104.0/21 | AS21928 | — |
| 172.56.104.0/23 | AS21928 | — |
| 172.56.106.0/23 | AS21928 | — |
| 172.56.108.0/23 | AS21928 | — |
| 172.56.110.0/23 | AS21928 | — |
| 172.56.112.0/21 | AS21928 | — |
| 172.56.112.0/23 | AS21928 | — |
| 172.56.114.0/23 | AS21928 | — |
| 172.56.116.0/23 | AS21928 | — |
| 172.56.118.0/23 | AS21928 | — |
| 172.56.12.0/23 | AS21928 | — |
| 172.56.120.0/21 | AS21928 | — |
| 172.56.120.0/23 | AS21928 | — |
| 172.56.122.0/23 | AS21928 | — |
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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 AS21928 represent?
AS21928 is an autonomous system number used to identify an independently operated network. The current page associates it with T-MOBILE-AS21928 - T-Mobile USA 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 AS21928 page?
They help explain the scale, interconnection depth, and route structure of AS21928. 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 AS21928?
The best next step is usually to return to a concrete IP landing page to see how a specific address maps into AS21928, 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.