Tier-1 Backbone / Wireless 5G United States

AS1239 — T-Mobile USA

Major US cellular carrier and 5G Home Internet provider, operating the combined T-Mobile and Sprint Tier-1 optical backbone.

Are you on this network?

Your ASN: AS15169 (Google LLC)

Test whether an IP address is routed through AS1239 (T-Mobile USA) or flagged as a VPN / Datacenter node:

Network Registry Specifications

Autonomous System Number: AS1239 (1239)

Organization Name: Sprint / T-Mobile Wireless

Country of Registration: United States

Network Classification: Tier-1 Backbone / Wireless 5G

Peering & Exchange Policy: Pioneered commercial IPv6-only mobile networks with 464XLAT translation for legacy IPv4 connections.