Investigation into Tismi’s compliance with its obligations under the General Conditions of Entitlement (GCs)

Ffonau a band eang Strwythur telathrebu Gorfodi
Published: 18 October 2024
Last updated: 24 June 2025

Open

Investigation into

Tismi BV (Tismi)

Case opened

18 October 2024

Summary

Investigation into whether the communication provider, Tismi, has failed to comply with obligations under General Conditions B1 which relate to the effective and efficient use of telephone numbers. 

Relevant legal provision(s)

General Conditions (GC) B1.4, B1.6, B1.8, B1.9(b) and/or B1.9 (c).

Direction under section 49 of the Communications Act 2003 and General Condition B4.4 of Ofcom’s General Conditions of Entitlement

In accordance with section 49 of the Communications Act 2003 and General Condition B4.4 of Ofcom’s General Conditions of Entitlement, Ofcom has issued a direction to Tismi B.V. (Tismi), registered company number KVK-32081827, and part of Link Mobility.

Ofcom has received information that indicates that mobile numbers allocated to Tismi by Ofcom have been linked to serious fraud or misuse.

Based on the information received by Ofcom, we have issued a formal direction to Tismi, requiring Tismi to block all calls and messages sent to or from specific mobile numbers allocated to it by Ofcom. Tismi was sent the direction on 20 June 2025 which requires Tismi to comply with the requirements set in the direction by 24 June 2025. 

Annex A11 of Ofcom’s Regulatory Enforcement Guidelines sets out the process that Ofcom will usually follow when it issues a direction under GC B4.4.

Ofcom has today opened an investigation into Tismi’s compliance with its obligations under the General Conditions of Entitlement (GCs). 

The investigation relates to concerns that numbers Ofcom has allocated to Tismi are/were being misused, including to facilitate scams. This has given us concerns as to whether Tismi is complying with its obligations, specifically:  

  • GC B1.6 which states that “where Telephone Numbers have been Allocated to the Communications Provider, that provider shall secure that such Telephone Numbers are Adopted or otherwise used effectively and efficiently”;
  • GC B1.8 which states that “the Communications Provider shall take all reasonably practicable steps to secure that its Customers, in using Telephone Numbers, comply (where applicable) with the provisions of [GC B1], the provisions of the National Telephone Numbering Plan and the Non-provider Numbering Condition”; and:
  • GC B1.9(c) which states that “the Communications Provider shall not transfer use of Telephone Numbers from the National Telephone Numbering Plan unless… the Telephone Numbers are Adopted or otherwise used effectively and efficiently”.

We also have some information that gives us concern as to whether numbers are being used in accordance with the National Telephone Numbering Plan and therefore shall also investigate whether Tismi is complying with obligations under:

  • GC B1.4 which states that a “Communications Provider may only use (or, where specified, Adopt) a Telephone Number listed in Part C of the National Telephone Numbering Plan where such use or Adoption is in accordance with the designation attributed to that Telephone Number”; and
  • GC B1.9(b) which states that “the Communications Provider shall not transfer use of Telephone Numbers from the National Telephone Numbering Plan unless… the Telephone Numbers are used in accordance with the National Telephone Numbering Plan”;

This investigation will seek to establish the facts surrounding this matter and examine whether there are reasonable grounds to believe that Tismi is contravening, or has contravened, the above GCs.

We will gather further information and publish an update to our investigation in due course.

Contact

Enforcement Team (enforcement@ofcom.org.uk)  

Case reference

CW/01289/10/24

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