192.0.2.142 Reserved IP Address - Test network address (TEST-NET-1)

An IP address, like 192.0.2.142, is a unique identifier for a device on the internet. Think of it as a digital street address that allows devices to send and receive information over a network.

Technically, an IP address is a string of numbers that can be represented in different formats like binary or hexadecimal. However, the most common format you will see is dot-decimal notation, as shown below.

How to Read an IP Address

• Four-Part Structure: A standard IPv4 address is always made up of four numbers separated by dots (periods). Addresses with fewer or more than four parts, like 192.0.2 or 192.0.2.142.1, are invalid.
• Number Range (0-255): Each of the four numbers must be between 0 and 255. An address containing a number larger than 255, such as 192.0.2.256, is invalid.
• Standard Separator: While you might occasionally see spaces or hyphens used (e.g., 192-0-2-142 or 192 0 2 142), the official and correct separator is a dot, as in 192.0.2.142.

To learn more about how IP addresses work, check out our full guide: What Is an IP Address?

The IP address 192.0.2.142 is a reserved address, not a public one. This means it cannot be used on the public internet and is instead set aside for a special purpose.

Internet standards organizations have set aside certain IP address blocks for these special uses. The table below lists the major reserved address ranges for IPv4.

IPv4 Reserved Address Ranges

For a complete list that also includes reserved IPv6 addresses, please refer to the Wikipedia article on Reserved IP Addresses.

The address 192.0.2.142 cannot be used as a private IP address for a router's login page. To understand why, it helps to know how IP addresses are classified.

IP addresses fall into three main functional categories:

• Public IPs: Unique addresses used on the global internet, assigned by official registries.
• Private IPs: Addresses reserved by IANA for use inside local networks (like a home or office). Routers use these for their login page.
• Other Reserved IPs: Addresses reserved for special technical purposes (e.g., network testing, multicasting). They are not for general use.

The image above illustrates the general difference between public and private IP usage.

Private IP Address Ranges

The specific ranges designated by IANA for private use are:

Since 192.0.2.142 does not fall within any of these designated private ranges, it is classified as a reserved address for special use, not a private address suitable for a router.

Note: Forcibly configuring a router to use 192.0.2.142 as its address will likely cause IP conflicts or other network errors, preventing it from functioning correctly.

The IP address 192.0.2.142 is part of the 192.0.2.0/24 private address block, a range defined by RFC 1918 for use on internal networks. This specific block spans from 192.0.2.0–192.0.2.255 and contains a total of 256 addresses. As a private IP range, it is not routable on the public internet.

192.0.2.142 is within the 192.0.2.0/24 address range, which is specifically reserved for documentation and examples, also known as TEST-NET-1. Its primary use is as a placeholder address in network tutorials, technical documentation, or configuration examples. Whether in books, online tutorials, or technical white papers, using these addresses can avoid conflicts with real networks or devices, ensuring readers can clearly understand the network configurations or protocol examples being demonstrated. The benefit of using the TEST-NET-1 address range is that it guarantees the security and universality of example content. Regardless of the reader's network environment, they will never accidentally associate these example addresses with actual devices or networks. It is a very important teaching tool, especially in introductory networking materials, where TEST-NET-1 frequently appears as the most basic IP example.

The short answer is no. The geographic location of the IP address 192.0.2.142 cannot be determined because it is not a public IP address.

Here's a breakdown of why, based on the three types of IP addresses:

• Public IP Addresses: These are used on the public internet and can be traced to a specific geographic location, usually down to the city level.
• Private IP Addresses: These are used within local networks (like your home or office) and have no geographic location data associated with them.
• Reserved IP Addresses: Like private IPs, these are set aside for special technical purposes and do not correspond to a real-world geographic location.

You can use a WHOIS lookup to find the organization responsible for an IP address, including contact details like the administrator's name and phone number.

For example, a WHOIS lookup for the IP address 192.0.2.142 provides the following key details:

• Administrative Agency: ELEVATED-NYC
• Description:
• Country/Region:
• Address: 1 Ronnie Lane Poughkeepsie NY 12601 United States
• Administrator: Elevated Computing LLC
• Tel: +1-845-625-4210
• E-mail: mmolinelli@elevatedcomputing.com

The WHOIS system was created so that network operators and the public can find the person or organization responsible for a network resource. This is crucial for troubleshooting technical problems (like an ISP needing to report a fault) and for reporting network abuse, such as contacting an administrator to stop spam coming from a specific IP address.

More Articles:

• WHOIS Contact Info for 192.0.2.142
• What is IP WHOIS information?
• What is IP WHOIS information used for?
• What do the IP WHOIS fields mean?