Mitigating the Threat of International Spoof Calls: Joint Efforts by the DoT and Telecom Service Providers

Sharisha Sahay
Sharisha Sahay
Research Analyst - Policy & Advocacy, CyberPeace
PUBLISHED ON
Feb 20, 2025
10

On 22nd October 2024, Jyotiraditya Scindia, Union Minister for Communications, launched the (DoT) Department of Telecoms’ International Incoming Spoofed Calls Prevention System. This was introduced in light of efforts toward preventing international fraudulent calls that enable cyber crimes. A recent report as per PIB claims for the system to have been effective and played a role in a 90% reduction in the number of spoofed international calls, its instances falling from 1.35 Crore to 6 Lakhs within two months of the launch of the system.

International spoof calls are calls that masquerade as numbers originating from within the country when displayed on the target's mobile screen. This is done by manipulating the calling line identity or the CLI, commonly known as the phone number. Previous cases reported mention that such spoof calls have been used for conducting financial scams, impersonating government officials to carry out digital arrests, and inducing panic. Instances of threats of disconnecting numbers by TRAI officials, and narcotics officials on finding drugs or even contraband through couriers are also rampant. 

International Incoming Spoofed Calls Prevention System 

As was addressed in the Budget in 2024, the system was previously called the Centralised International Out Roamer (CIOR), and the DoT was allocated Rs.38.76 crore for the same. The Digital Intelligence Unit (DIU) under the DoT is another project that aims to investigate and research fraudulent use of telecom resources, including messages, scams, and spam - the budget for which has been increased from 50 to 85 crores.

The International Incoming Spoofed Calls Prevention System was implemented in two phases, the first one was at the level of the telephone companies (telcos). Telcos can verify their subscribers and Indian SIMs based on the Indian Telecom Service Providers (TSPs) international long-distance (ILD) network. When a user with an Indian number travels abroad, the roaming feature gets activated, and all calls hit the ILD network of the TSP. This allows the TSP to verify whether the numbers starting with +91 are genuinely making calls from abroad or from India. However, a TSP can only verify numbers that are issued with their TSP ILD network and not those of other TSPs. This issue was addressed in the second phase, as the DIU of DoT and the TSPs built an integrated system so that a centralised database could be used to check for genuine subscribers. 

CyberPeace Outlook

A press release on 23rd December 2024 encouraged the TSPs to label incoming International calls as International calls on the mobile screen of the receiver. Some of them have already started adding labels and are sending awareness messages informing their subscribers of tips on staying safe from scams. Apart from these, there are also applications available online that help in identifying callers and their location, however, these are at the behest of the users' efforts and have moderate trust value. At the level of the public, the practice of blocking unknown international numbers and not calling back, along with awareness regarding country codes is encouraged. Coordinated and updated efforts on the part of the Government and the TSPs are much appreciated in today's time as scammers continue to find new ways to commit cyber crimes using telecommunication resources.

References

  1. https://www.hindustantimes.com/india-news/jyotiraditya-scindia-launches-dot-system-to-block-spam-international-calls-101729615441509.html
  2. https://www.business-standard.com/india-news/centre-launches-system-to-block-international-spoofed-calls-curb-fraud-124102300449_1.html
  3. https://www.opindia.com/2024/12/number-of-spoofed-international-calls-used-in-cyber-crimes-goes-down-by-90-in-2-months/
  4. https://www.cnbctv18.com/technology/telecom/telecom-department-anti-spoofed-international-calls-19529459.htm
  5. https://pib.gov.in/PressReleaseIframePage.aspx?PRID=2067113
  6. https://pib.gov.in/PressReleasePage.aspx?PRID=2087644
  7. https://www.hindustantimes.com/india-news/display-international-call-for-calls-from-abroad-to-curb-scams-dot-to-telecos-101735050551449.html 

PUBLISHED ON
Feb 20, 2025
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