---
title: "US Porting Scheduling Guide"
slug: "us-porting-scheduling-guide"
updated: 2026-10-01T14:13:15Z
published: 2026-10-01T14:13:15Z
canonical: "learn.calltower.com/us-porting-scheduling-guide"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://learn.calltower.com/llms.txt
> Use this file to discover all available pages before exploring further.

# US Porting Scheduling Guide

*Article Owner: John Lodden*

Port times are scheduled within carrier-supported windows to help ensure assistance is available if an issue occurs.

Below is the PDF for the Standard and Large or carrier-manages port windows

> [!CAUTION]
> **IMPORTANT SCHEDULING REQUIREMENTS**
> 
> ***Standard windows: Ports should be scheduled within the standard hours shown above.***
> 
> • Early exceptions: Requests from 5:00 AM to 7:30 AM ET are exceptions, not standard scheduling.
> 
> • Required validation: Every early exception must be carrier-supported and validated and approved by CallTower Telecom before confirmation.
> 
> • Final confirmation: Requested dates and times are not final until the supported interval is confirmed.
> 
> Timing factors: Carrier, order size, account structure, number type, time zone, and daylight-saving differences may affect availability.

## Scheduling Guide

[PDF document](https://cdn.us.document360.io/4662144b-ab1f-4796-8b7b-e9f9c609894f/Images/Documentation/US_Port_Scheduling_Guide v.2(1).pdf?sv=2026-02-06&spr=https&st=2026-11-05T01%3A16%3A42Z&se=2026-11-05T02%3A16%3A42Z&sr=c&sp=r&sig=accETrsF9cCkgcqCBBMEwf73qhv9SDPMWgD4z%2BZfaM8%3D)