CDR (Call Detail Record) Analysis & Investigation is the systematic process of examining telecommunications metadata to uncover communication patterns, establish suspect movements, and map hidden criminal networks. It serves as a cornerstone of modern digital forensics for law enforcement, intelligence units, and private security teams.
Because it strictly evaluates metadata rather than the actual content of phone calls or text messages, it provides highly reliable, legally compliant evidence that tracks the “who, when, where, and how long” of mobile network events. Core Data Fields Captured in a CDR
When a mobile user interacts with a network, the Mobile Network Operator (MNO) generates a log file containing several critical fields:
Identifiers: Originating and receiving phone numbers, IMEI (handset hardware ID), and IMSI (SIM card identifier).
Temporal Data: Exact date, time of initiation, and the overall duration of the call or data session.
Event Type: Classification of the event, such as an incoming/outgoing voice call, SMS text, or GPRS/IP data session.
Geospatial Markers: Cell tower IDs (Cell-IDs) reflecting the physical sectors that handled the beginning and end of the communication. Key Analytical Techniques in Investigations
Investigators pass raw, unformatted telecom files into specialized software to perform four primary types of analysis: CDR Analysis & Investigation – Ketan Computers
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