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AS21928

#uncarrier

United States (US)

ASN Information

AS NumberAS21928
AS NameT-MOBILE-AS21928
OrganizationT-MOBILE-AS21928 - T-Mobile USA, Inc.
Also known as#uncarrier
CountryUnited States (US)
RegistryARIN
ASN TypeCable/DSL/ISP
Last Seen
Announcement Count542
IPv4 Prefix Count284
IPv6 Prefix Count258
RPKI StatusValid ×37Unknown (could not be determined) ×13
IRR RecordsView IRR route objects
Websitehttp://www.t-mobile.com ↗

AS Path to AS21928

  1. 49544i3Dnet i3D.net B.V
  2. 21928Origin

Most common path, seen 12× in route collector data, latest at a collector in London (2026-10-22 05:26:08 UTC). Prepends collapsed.

Route Collectors (Visibility)

Sydney: 11 peer session(s)São Paulo: 16 peer session(s)Johannesburg: 19 peer session(s)Singapore: 22 peer session(s)Amsterdam: 24 peer session(s)London: 28 peer session(s)Eugene, OR: 56 peer session(s)
High (10+ peers)Medium (3–9)Low (1–2)

Approximate route collector locations, coloured by peer sessions carrying this AS's routes.

Announced Prefixes (542)

View All →
PrefixFamilyRPKILast Seen
65.76.0.0/16IPv4ValidNot looked up yet
66.94.0.0/19IPv4ValidNot looked up yet
66.94.3.0/24IPv4Not checkedNot looked up yet
66.94.4.0/24IPv4Not checkedNot looked up yet
66.94.5.0/24IPv4Not checkedNot looked up yet
66.94.6.0/24IPv4Not checkedNot looked up yet
66.94.7.0/24IPv4Not checkedNot looked up yet
66.94.8.0/24IPv4Not checkedNot looked up yet

Peers (48)

View All →
ASNameRelationshipPathsLast Seen
AS6461ZAYO-6461 - Zayo BandwidthUpstream (inferred)326
AS4637ASN-TELSTRA-GLOBAL - Telstra GlobalUpstream (inferred)77
AS3356LEVEL3 - Level 3 Parent, LLCUpstream (inferred)12
AS49544i3Dnet i3D.net B.VUpstream (inferred)12
AS174COGENT-174 - Cogent Communications, LLCUpstream (inferred)1
AS4766KIXS-AS-KR-KR - Korea TelecomUpstream (inferred)1
AS1031PEER1-1031 - PEER 1031 LLCUpstream (inferred)Inferred—
AS4230AS4230 - CLARO S.A.Upstream (inferred)Inferred—

Neighbours seen next to AS21928 in public AS paths. These are not confirmed BGP sessions; peer IP addresses and locations are not published by these sources.

Public Peering Exchange Points (10)

IX Updates →
ExchangeLocationIPv4IPv6SpeedRS peerUpdated
Any2DenverDenver, US206.51.46.1212605:6c00:303:303::121300GYes
Any2WestLos Angeles and Silicon Valley, US206.72.211.222001:504:13::211:22300GYes
Boston Internet ExchangeBoston, Massachusetts, US206.108.236.822001:504:24:1::55a8:1200GYes
DET-iXDetroit, US209.124.52.782607:f790:100::78800GYes
FL-IXMiami, US206.41.108.202001:504:40:108::1:20200GYes
MICEMinneapolis, MN, US206.108.255.1792001:504:27::55a8:0:1400GYes
MICEMinneapolis, MN, US206.108.255.2432001:504:27::55a8:0:2400GNo
NYIIX New YorkNew York, US198.32.160.2452001:504:1::a502:1928:1200GYes
PR-IXSan Juan, PR204.138.0.592620:102:b000::59200GYes
SFMIXSan Francisco, US206.197.187.252001:504:30::ba02:1928:1100GYes
SIX SeattleSeattle, US206.81.81.352001:504:16::55a8200GYes

IX ports registered by AS21928 (self-reported by the network).

Interconnection Facilities (16)

View all →
FacilityCityCountry
Equinix DC1-DC15,DC21-DC22 - AshburnAshburnUnited States
Digital Realty ATL13 - AtlantaAtlantaUnited States
Markley Group One Summer Street BostonBostonUnited States
Equinix CH1/CH2/CH4 - ChicagoChicagoUnited States
Equinix DA - Dallas (previously Infomart Dallas)DallasUnited States
CoreSite - Denver (DE1)DenverUnited States
Databank Houston West (HOU1) (HOU2)HoustonUnited States
Equinix LA1 - Los AngelesLos AngelesUnited States
Equinix MI1 - Miami, NOTAMiamiUnited States
Digital Realty NYC (111 8th Ave)New YorkUnited States
165 Halsey Meet-Me RoomNewarkUnited States
T5@DallasPlanoUnited States
Digital Realty SFO (200 Paul)San FranciscoUnited States
Equinix SV1/SV5/SV10 - Silicon Valley, San JoseSan JoseUnited States
Equinix SE2/SE3 - SeattleSeattleUnited States

Data centres where AS21928 says it can interconnect (self-reported).

IRR AS-SET and Peering Policy

IRR AS-SETAS-21928
Member of AS-SETsSee IRR page
Peering policySelective
Multiple locationsNot Required
Ratio requirementNo
ContractNot Required
TrafficNot available
Traffic ratioMostly Inbound
Geographic scopeNorth America
Max prefixes (IPv4 / IPv6)1000 / 1000
Unicast / IPv6 / MulticastYes / Yes / No
Looking glassNot available
Route serverNot available

Contact Information (1)

RoleNameEmailPhone
PolicyPeering grouppeering@t-mobile.com—

Only contacts the network has chosen to publish are shown.

Upstreams (27)

View all →
ASNameRelationshipPathsLast Seen
AS6461ZAYO-6461 - Zayo BandwidthUpstream (inferred)326
AS4637ASN-TELSTRA-GLOBAL - Telstra GlobalUpstream (inferred)77
AS3356LEVEL3 - Level 3 Parent, LLCUpstream (inferred)12
AS49544i3Dnet i3D.net B.VUpstream (inferred)12
AS174COGENT-174 - Cogent Communications, LLCUpstream (inferred)1
AS4766KIXS-AS-KR-KR - Korea TelecomUpstream (inferred)1
AS1031PEER1-1031 - PEER 1031 LLCUpstream (inferred)Inferred—
AS4230AS4230 - CLARO S.A.Upstream (inferred)Inferred—
AS6057AS6057 - Administracion Nacional de TelecomunicacionesUpstream (inferred)Inferred—
AS6424EDGOO EDGOO NETWORKS UNIPESSOAL LDAUpstream (inferred)Inferred—
AS6939HURRICANE - Hurricane Electric LLCUpstream (inferred)Inferred—
AS7195AS7195 - EDGEUNO S.A.SUpstream (inferred)Inferred—

Downstreams (3)

ASNameRelationshipPathsLast Seen
AS16550GOOGLE-PRIVATE-CLOUD - Google LLCDownstream (inferred)Inferred—
AS22140T-MOBILE-AS22140 - T-Mobile USA, Inc.Downstream (inferred)Inferred—
AS400318VERSA-01 - Versa Networks, Inc.Downstream (inferred)Inferred—

Registry and network details

Registered holderT-MOBILE-AS21928 - T-Mobile USA, Inc.
RegisteredYes
Peering policySelective
IRR AS-setAS-21928
Registry record last modifiedNot available
MaintainersNot available
Internet exchanges10
Facilities16
Network profile updated

Data updated . See limitations.