---
title: Domain Contact Management
description: "Domain Contacts Setup Guide # How to Change Domain Contacts Instructions for changing the **Domain Contacts** (**Registrant Contact** / **Administrative Contact** / **Technical Contact** / **Billing Contact**) for your domain from the [client portal](https://bestnetllc.co.jp/en/encyclopedia/client-portal-en/). In this guide, domain contact names…"
url: "https://bestnetllc.co.jp/en/docs/domain-contact-management/"
updated: "2026-10-19"
category: domain
---

# Domain Contact Management

Domain Contacts Setup Guide

# How to Change Domain Contacts

Instructions for changing the **Domain Contacts** (**Registrant Contact** / **Administrative Contact** / **Technical Contact** / **Billing Contact**) for your domain from the [client portal](https://bestnetllc.co.jp/en/encyclopedia/client-portal-en/).

In this guide, domain contact names are always listed in English (**Registrant Contact**, etc.).

## Overview

You can change various Domain Contacts from the “Contact Information” section on the domain details screen. When entering information, please register names, addresses, company names, etc. in **English (Roman characters)**.

## Prerequisites

- You are logged into the [client portal](https://bestnetllc.co.jp/en/encyclopedia/client-portal-en/)
- The target domain is displayed in the portal’s “Domain” list
- You have prepared the contact information to be entered (name, address, company name, etc.) in **English (Roman characters)**

## Operating Procedures

### 1Open the “Domain” list

Open **“Domain”** from the left menu to display the domain list screen.

### 2Open the details of the domain you want to change

In the domain list, click the **arrow (→)** at the right end of the target domain row to open the details screen.

![Open domain details from the domain list screen](https://bestnetllc.co.jp/wp-content/uploads/2025/12/01_domain-list_open-domain-details_no-annotation.png)

### 3Open “Contact Information”

From the left menu on the domain details screen (“Domain Details”), click **“Contact Information”**.

![Open contact information from the left menu on the domain details screen](https://bestnetllc.co.jp/wp-content/uploads/2025/12/02_domain-details_click-contact-information_no-annotation.png)

### 4Set Registrant Contact

In the **Registrant Contact** section (displayed as “Registrant Contact” on the screen) under “Contact Information”, select the setup method.

- **Custom**: Manually enter information into the form
- **Use an existing contact**: Select an existing contact from the dropdown

If entering manually, fill in the following items in **English (Roman characters)**.

- First Name / Last Name
- Company Name
- Email Address
- Address / City / State
- Postal Code
- Country
- Phone

![Screen to select the Registrant Contact setup method](https://bestnetllc.co.jp/wp-content/uploads/2025/12/03_registrant-contact_select-method_no-annotation.png)

### 5Set Administrative Contact and Technical Contact

Next, set the **Administrative Contact** and **Technical Contact**.

Setup methods available for each contact type

- **Custom**: Manually enter into the form
- **Same as Registrant**: Use the same information as Registrant Contact
- **Use an existing contact**: Select an existing contact

![Setup screen for Administrative Contact and Technical Contact](https://bestnetllc.co.jp/wp-content/uploads/2025/12/04_admin-tech-contact_same-as-registrant_no-annotation.png)

### 6Set Billing Contact

Set the **Billing Contact** in the same manner.

- **Custom**: Manually enter into the form
- **Same as Registrant**: Use the same information as Registrant Contact
- **Use an existing contact**: Select an existing contact

![Billing Contact setup screen](https://bestnetllc.co.jp/wp-content/uploads/2025/12/05_billing-contact_same-as-registrant_no-annotation.png)

### 7Save changes

After setting all contacts (**Registrant Contact** / **Administrative Contact** / **Technical Contact** / **Billing Contact**), click **“Save Changes”** at the bottom of the screen.

![Save changes button](https://bestnetllc.co.jp/wp-content/uploads/2025/12/06_save-changes_no-annotation.png)

## Additional Notes and Cautions

- Contacts available for selection through “Use an existing contact” are obtained from the **“Contact Management”** section registered on the account side.
- Depending on the registry (TLD), there may be restrictions on contact changes. If an error is displayed after saving, review the entered information (English characters, required fields).
- Changes may take time to reflect.