• A Strategic Initiative to Advance America's Telecommunications Infrastructure

Roaming & IPX Hubs

Enable Roaming. Expand Reach. Exchange Mobile Services at Scale.

Roaming & IPX Hubs

As mobile subscribers move across borders and networks adopt LTE and 5G roaming, roaming hubs and IPX providers play a critical role in enabling interoperability — across voice, data, messaging, and signaling.

Yet operating a high-availability, compliant, and monetizable roaming exchange requires global coverage, multi-protocol integration, signaling security, and seamless peering.

USTelco delivers a full-stack platform for Roaming and IPX Hubs — including signaling transit, IPX transport, GRX/GTP tunneling, Diameter/SS7 interconnect, and roaming security. We help you scale your hub, simplify partner onboarding, and maintain full control over QoS, compliance, and fraud prevention.

USTelco

What We Deliver

Diameter & SS7 Roaming Exchange

Hosted STP and DRA for S6a, Cx, Gx, Sh

SCCP, MAP, CAP for legacy interworking

GT-based routing, IMSI translation, MNP querying

Real-time monitoring and traffic diagnostics

Global IPX & GRX Backbone

QoS-assured MPLS and DIA delivery

Class Selector (CS) enforcement, IP packet shaping

GTP-C/U anchoring with support for LTE and 5G roaming

Multi-region PoPs with redundant architecture

Roaming Partner Enablement

Pre-integrated interconnects with 500+ networks

Streamlined provisioning (IMSI, APN, GT routing)

Hosted roaming agreements, traffic clearing models

Optional SIM test tools and silent roaming detection

Security & Compliance Layer

Integrated signaling firewall (SS7, Diameter, SIP, HTTP/2)

Detection of fake attach, location tracking, and spoofing

Compliance with GSMA FS.11 / FS.19 and 5G SEPP requirements

Real-time alerting and per-network threat analysis

USTelco

Use Cases

Tourism & Travel SIMs

Support global reach with flexible IMSI/routing logic

Regulatory Projects

Centralize lawful compliance and SIM routing in-country

Roaming Hubs & Clearinghouses

Enable connectivity between multiple MNOs and MVNOs

Regional IPX Providers

Extend roaming to global partners without building new links

Private Mobile Networks

Bridge campus or enterprise networks to global roaming ecosystems

Platform Capabilities

LayerFunctionality
DiameterRelay, Agent, Edge, and Proxy modes
SS7MTP, SCCP, TCAP, MAP, CAP interworking
IPX TransportMPLS, DIA, QoS tiering, Class Selector 4–6
GTP-C/U AnchoringData session control, usage reporting, anti-theft
ENUM/DNS RoutingIMSI, APN, SIP URI mapping, roaming fallback logic

Standards & Frameworks

Commercial Models Supported

ModelDescription
Clearinghouse ModeEnable bilateral and multilateral roaming agreements
Transit Provider ModelRoute traffic across IMS, LTE, 5G, and legacy networks
SIM Exchange HubsManage IMSI hosting and multi-brand profile access
Sponsored RoamingBridge travel SIMs or MVNOs to national MNOs

Why USTelco?

STIR/SHAKEN safeguards America from robocalls.

Power roaming like a Tier 1

USTelco helps you scale, secure, and monetize your roaming exchange — without building it from scratch.