

OPERATIONAL CHALLENGES
Operational bottlenecks and regulatory risk in modern networks
IP-to-subscriber correlation has evolved into a high-risk bottleneck. Modern networks require correlating high data volumes from dynamic sources, increasing the potential for errors, missed deadlines, and non-compliance with national and EU regulations.
Common challenges include:
MANAGING MASSIVE CG-NAT DATA VOLUMES
The primary challenge is to accurately correlating massive volumes of shared IPv4 addresses (CG-NAT) to the correct individual subscriber. Manual processes are unsustainable, costly, and significantly increase legal risk exposure.
ACCURATE CORRELATION IN IPV6 NETWORKS
While IPv6 reduces shared IP issues, ensuring full legal traceability requires specialized tools to capture and correlate the correct identifiers within the new protocol framework.
DYNAMIC ASSIGNMENT COMPLEXITY IN FIXED NETWORKS
REX manages all forms of dynamic IP allocation in fixed networks. We automate the crucial correlation between temporary assignment logs and the permanent subscriber identity, eliminating manual data stitching.
THE REX AUTOMATED WORKFLOW
From IP search to final data handover
REX is an ISO 27001:2022 certified telecom data platform, built for operational efficiency. It automatically manages all data ingestion, correlation, and report generation, enabling your team to focus solely on compliance decisions.
SIMPLE SEARCH INITIATION
The operator enters the IP address and timeframe into an optimized, role-based interface, triggering the correlation platform engine instantly.
AUTOMATED CORRELATION & MATCHING
The REX Platform instantaneously ingests and correlates all complex data sources, including CG-NAT logs, DHCP, and RADIUS records, in historical and real-time to pinpoint the precise subscriber identity (IMSI/MSISDN).
VERIFIED RESULTS AND HANDOVER
The verified data is compiled into a handover report that meets all legal requirements and is delivered to Lawful Authorities (LEA). Result available in < 30s. This speed ensures you meet strict national and EU deadlines.

The secure compliance advantages
REX: Your guarantee for legal validity and risk mitigation
JUDICIAL EVIDENCE & CHAIN OF CUSTODY
Reports are generated with a complete Chain of Custody and automated timestamps, securing the evidential value and legal validity in court. Output ETSI formats are compliant with European standards, including potential E-codex readiness for secure data exchange.
REGULATORY COMPLIANCE & AUDIT
Guarantees full regulatory compliance. Includes detailed, immutable audit logs and strict, role-based access to meet data privacy and NIS2 readiness requirements.
COMPREHENSIVE NETWORK COVERAGE
Seamlessly supports all complex network environments: IPv4, IPv6, CG-NAT, and all dynamic assignment protocols. No data is left uncorrelated, minimizing exposure to incomplete requests.
OPERATIONAL RISK REDUCTION
By automating the entire workflow, REX minimizes manual handling errors, drastically reduces operational costs, and ensures <30 second compliance, mitigating the risk of regulatory fines or non-compliance penalties.
TRUSTED BY LEADING OPERATORS FOR LAWFUL COMPLIANCE
Reports we previously had to wait several hours for are now generated in minutes or even seconds.

TERJE RUDIN
Product Manager Police Response Center & NOC @Telenor Norway
PROVEN IN FIELD
Built for Telecom Operators.
Trusted by Authorities.
Subtonomy REX is a future-proof SaaS platform tailored for telecom operators to meet legal data retention and lawful request obligations with unmatched speed, integrity, and efficiency.
Trusted by Tier-1 European operators, REX consolidates retention and geolocation data into a single, secure application — purpose-built for today’s demands and tomorrow’s expectations.
Why Telecom Operators
choose REX for Legal Data Retention
INSTANT SEARCH RESULTS WITHIN 30 SEC
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Lightning fast individual records available within 30 seconds
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Preprocessed data enables immediate delivery to authorities
ONE SYSTEM - ALL DATA
Streamlined workflow in ONE consolidated system
Consolidates CDRs, NAT logs, passive probes, CRM, and network data
Eliminates silos and manual searches across disparate systems
AUTOMATION-FIRST APPROACH
Accurate results removes human error and reduces legal risk
Easy-to-use GUI speeds oresponse time, new onboarding and reduces reliance on skilled staff
Increases team efficiency and reduces operational costs
GDPR COMPLIANT & ISO 27001 CERTIFIED
Built-in controls for access, audit logging, and data minimization
Ensures only lawful and verified requests are processed
SECURE BY DESIGN
Fully on-premise deployment
Flexible retention times configured by type of record
Role-based access, secure transfer, and complete traceability
Complies with national and international standards (ETSI TS102 657 & custom national formats)
FUTUREPROOF FOR UPCOMING LEGISLATIONS
Designed to adapt to evolving legal frameworks and network techniques
Highly flexible in terms of data formats, delivery logic, and access models
Frequently Asked Questions about IP address tracebility
Your Questions, Answered.
We understand that data retention involves complex technical, legal, and security details. To provide clarity, we've gathered straightforward answers to the most common questions about the REX platform, its capabilities, and its compliance.
The primary challenge is automatically and rapidly correlating subscriber data from fragmented sources such as shared CG-NAT addresses and dynamic fixed-network assignments. REX automates this process to eliminate manual effort and ensure regulatory compliance within strict deadlines.
REX generates reports with a complete Chain of Custody, which includes traceable audit logs and verified timestamps for every step of the correlation process. This ensures that the disclosed data has full evidential value and is accepted by Law Enforcement Agencies (LEA) in court.
Yes. REX is specifically designed for the hybrid network environment and handles correlation for IPv4, IPv6, CG-NAT, and all dynamic IP assignment methods. Data is sourced from all relevant network and reference systems to ensure 100% traceability regardless of the underlying protocol.
REX is optimized for operational speed and delivering verified IP-to-subscriber correlation results and location information within 30 seconds. This speed is crucial for meeting legal deadlines and improving operational efficiency.
Yes. REX can be deployed on-premise and is ISO 27001:2022 certified. It incorporates detailed audit logs, role-based access controls, and adherence to strict security standards to protect sensitive customer data and comply with data privacy regulations.
Let’s Talk Future-Ready Retention
Subtonomy REX isn’t just a system, it’s your trusted partner for lawful data retention. Reduce integration effort, respond faster to lawful demands, and ensure end-to-end control.
Contact us to learn more or book a demo.