Call Detail Record


A Call Detail Record (CDR) is a data record produced by a telephone exchange or other telecommunications equipment, that documents the details of a telephone call or other telecommunications transaction that passes through the equipment. It typically includes information like the time the call was made, its duration, the calling party’s number, and the called party’s number. This record is essential in billing processes, troubleshooting, and call tracking.


The phonetics of the keyword “Call Detail Record” is: /kɔːl diːteɪl rɪkɔːrd/.

Key Takeaways

<ol><li>Call Detail Record or CDR is a data record produced by a telephone exchange or other telecommunications equipment that documents the details of a telephone call or other telecommunication transaction (e.g., text message) that passes through the facility or device. </li><li>CDR contains various attributes of the call, like the time the call was made, duration of the call, the calling telephone number, and the receiving telephone number, etc. It is uniquely identified by a call identifier.</li><li>It is an important source used in telecommunication services for billing, network analysis, customer profiling, fraud detection, and the likes. Additionally, Law enforcement and intelligence agencies often access CDRs as part of investigations.</li></ol>


The technology term “Call Detail Record” (CDR) is significant because it provides detailed information about calls made through a telephone service provider. CDRs are crucial for a variety of reasons, including billing, analyzing call patterns, auditing, fraud detection, and network management. They contain specifics about the date, duration, and destination of the call, the type of call (voice or data), and other service-specific factors. Notably, they assist Telecom service providers in charging their customers correctly, maintaining network efficiency, as well as in understanding user behavior – all critical for improving service delivery and customer satisfaction.


Call Detail Record (CDR) is an essential tool utilized in the telecommunications industry that plays a crucial role in operational management, as well as in helping businesses maximize their profits and improve customer service. It is a data record produced by a telephone exchange or other telecommunication service provider that documents the details of a telephone call or other telecommunications transaction that passes through that facility or device. With CDR, service providers can create billing records, as it contains details such as call duration, the number called, the time the call was placed, and the overall cost of the call. Moreover, Call Detail Record provides significant data that can be analyzed for better decision-making, providing insights on call patterns, customer behavior, and network performance. Apart from billing information, CDR can be used for performance evaluation and service improvement. For example, network operators may use CDR data to review network performance and improve service quality, while businesses or marketers might use the data to evaluate the success of promotional campaigns, by analyzing the volume of calls generated in response to advertisements. Hence, CDR can significantly help in evaluating and enhancing the efficiency of the telecom operation.


1. Telecom Billing: In telecommunications, one major application of Call Detail Records (CDR) is for billing purposes. Every time a call is made or a text is sent, a CDR is generated by the service provider to track the usage of the service. These records denote the time of the call, its duration, the numbers involved, and other relevant information. The data is then used to generate customer bills at the end of the billing period.2. Fraud Detection: Another example of the usage of CDR is in detecting fraudulent activities. Companies can analyze CDR to spot any unusual activities, such as a high volume of international calls being made at odd hours. This can help in early detection of SIM card cloning or other frauds, protecting both the company and the customer.3. Network Management & Optimization: Telecom providers use CDRs to manage their network better and optimize it for peak performance. They can analyze the data to find out the call patterns, peak hours, call drop rates and adjust their infrastructure accordingly. This helps in improving their service quality and customer satisfaction.

Frequently Asked Questions(FAQ)

Q: What is a Call Detail Record (CDR)?A: A Call Detail Record (CDR) is a data record produced by a telephone exchange or other telecommunication service. It contains detailed information about a specific phone call, including the source and destination numbers, call duration, time of call, and other important information.Q: What kind of information is typically included in a CDR?A: A CDR may include information such as call origin, call destination, call start and end time, call duration, call type (e.g., voice, SMS, data), billing information, and details about the route the call took through the network.Q: What is the importance of CDRs in telecommunications?A: CDRs are primarily used for billing purposes, to provide a detailed record of the services used by a customer. They can also be used for traffic analysis, fraud detection, and network management. Q: How are CDRs used for billing purposes?A: The data in a CDR can be used to calculate the cost of a call based on factors like call duration, distance, time of day, and call type. This allows telecommunication providers to accurately bill their customers for the services they use.Q: Can CDRs be used in legal proceedings?A: Yes, CDRs may be used as evidence in legal proceedings. They can provide a historical record of a person’s communication activities, which may be relevant in certain situations. However, the use of CDRs in legal proceedings is governed by privacy laws and regulations which vary between jurisdictions.Q: Are CDRs only used in telecommunication industries?A: While CDRs originated in the telecommunication industry, their use has expanded to other industries as well. Any business that provides services on a usage basis could benefit from the detailed usage data a CDR provides.Q: How long are CDRs retained?A: The retention period for CDRs varies based on a service provider’s policies and the regulations of the country in which they operate. Some may retain CDRs for a few months, while others might retain them for years. Q: Are CDRs secure?A: Telecommunication companies and service providers typically implement stringent measures to ensure the security and confidentiality of CDRs, due to the sensitive nature of the information they contain. However, like any data, they can be vulnerable if not properly protected. As such, security is a crucial aspect of CDR management.

Related Finance Terms

  • Telecommunication
  • Data Retention
  • VoIP (Voice over Internet Protocol)
  • Subscriber Identity Module (SIM Card)
  • Billing System

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