> For the complete documentation index, see [llms.txt](https://docs.colt.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.colt.net/product/porting-information.md).

# PORTING INFORMATION

To help keep things consistent when your switching to our services, number portability is available for both retail and wholesale services. If you wish to keep your existing numbers when using our Voice, VoIP or IN Services, you must follow the instructions listed below to bring these numbers over to the Colt network.

On this page, you will find all the information you need to do this, alongside country-specific information and other helpful resources.

### GENERAL RESOURCES

#### COLT PORTING DESK CONTACT ESCALATION MATRIX

Who to contact in the event of any issues affecting your service, sorted by country.

{% file src="/files/A8p4stmwWD2unRPkOznH" %}

#### PORTING MATRIX

Our information matrix for all types of ports available with us.

{% file src="/files/TZp2CoGYjIyh5pGRPQHQ" %}

#### COUNTRY PORTING COVERAGE (EUROPE)

Porting agreements that we have in place with carriers across Europe.

{% file src="/files/qWYSkeCHAmQ2a0zbXfmf" %}

### RECENT UPDATES

<table><thead><tr><th width="170">DATE</th><th>CATEGORY</th><th>ACTIONS</th></tr></thead><tbody><tr><td>May 6, 2026</td><td>Porting Matrix</td><td>The Porting Matrix has been updated with the following changes: updated rejections reasons for CZ port out (GSIP + IN), updated port out details for Singapore (GSIP), and updated port details for South Korea (GSIP)</td></tr><tr><td>February 26, 2026</td><td>Porting Matrix Updates</td><td>The Porting Matrix has been updated with the following changes: (1)Additional information has been added for South Korea (Global Geo)</td></tr><tr><td>January 6, 2026</td><td>Migration to new docs site</td><td>All porting information has now been migrated to the new Docs platform. Please use the feedback tools on this site to provide your feedback.</td></tr><tr><td>September 5, 2025</td><td>Global porting forms</td><td>(1) The Romanian LOA has now been added into the Global IN section. (2) An additional porting form for Bulgaria has been uploaded.</td></tr></tbody></table>

<table data-header-hidden><thead><tr><th valign="bottom"></th></tr></thead><tbody><tr><td valign="bottom"><p>*Updated rejection reasons for CZ port out <em>(GSIP + IN)</em></p><p>*Updated port out details for Singapore <em>(GSIP)</em></p><p>*Updated port details for South Korea <em>(GSIP)</em></p></td></tr></tbody></table>