{"id":6475,"date":"2023-10-05T14:17:14","date_gmt":"2023-10-05T13:17:14","guid":{"rendered":"https:\/\/www.gsma.com\/solutions-and-impact\/technologies\/security\/?page_id=6475"},"modified":"2026-06-02T13:42:47","modified_gmt":"2026-06-02T12:42:47","slug":"gtleasing","status":"publish","type":"page","link":"https:\/\/www.gsma.com\/solutions-and-impact\/technologies\/security\/gtleasing\/","title":{"rendered":"GSMA Global Title Leasing Code of Conduct"},"content":{"rendered":"\n
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GSMA Global Title Leasing Code of Conduct<\/t-isac><\/t-isac><\/t-isac><\/h1>\n\n\n\n

Increasing transparency, reducing risk<\/p>\n\n\n\n

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Global Titles enable information to be exchanged within and between networks, so that mobile services work regardless of whether a user is in their home network or roaming<\/h2>\n\n\n\n

A Global Title (GT) is an address used for routing signalling messages (using the signalling connection Control Part \/ SCCP protocol) on telecommunications networks. National authorities allocate numbering resources to communications providers, which reserve and use part of those numbers for use as GTs. In mobile networks, GTs enable information to be exchanged within and between networks, so that mobile services work regardless of whether a user is in his\/her home network or roaming.<\/p>\n\n\n\n

The practice of leasing GTs (by a \u201cGT lessor\u201d to a \u201cGT lessee\u201d) has enabled additional entities (GT lessees) to gain access to the global SS7 network and to exchange signalling messages using GTs associated with the GT lessor. This reduces routing transparency, and has led to concerns that such GT leasing practices introduce security risks for mobile network operators and their customers.<\/p>\n\n\n\n

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Download the Global Title Leasing Code of Conduct (PRD FS.52)<\/h2>\n\n\n\n

This document addresses the leasing of Global Titles used within SS7 networks, motivations for this practice, how they are used and a code of conduct to prevent abuse and the introduction of undesirable risks for mobile network operators (MNOs) and their customers<\/p>\n\n\n\n

Learn more<\/a><\/div>\n<\/div>\n\n\n\n
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What’s in the code of conduct?<\/h3>\n\n\n\n

GSMA members have developed a GT leasing reference document (FS.52) that describes GT leasing motivations, benefits, issues and concerns. The document also contains a code of conduct detailing requirements and guidelines intended to minimise risks associated with GT leasing. GT lessors and transit carriers involved in GT leasing arrangements are invited to voluntarily declare to the GSMA that they adhere to the GT leasing code of conduct, as evidence of their commitment to routing transparency and to reduce the risks for mobile network operators and their customers. The names of such companies will be added to this website as code of conduct signatories.<\/p>\n\n\n\n

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The names of such companies will be added to this website as code of conduct signatories.<\/p>\n\n\n\n

Mobile operators and transit carriers that are not involved in GT leasing are also invited to declare this, along with their support for the code of conduct. These companies will be added to this website as code of conduct supporters.<\/p>\n\n\n\n

Find out more about the code of conduct from Stephen Ornadel, Senior Vice President, Mobileum. <\/p>\n<\/div>\n\n\n\n