The Las Vegas metropolitan area, including Henderson (Henderson, NV), primarily uses area codes 702 and 725.

702 is the original code assigned to all of Southern Nevada, and 725 was added due to a shortage of phone numbers caused by population growth. Both codes are used throughout the Las Vegas metropolitan area, including Henderson.

The U.S. phone number system consists of an area code (3 digits) + phone number (7 digits) = a total of 10 digits. Even within the same area code, calls between regions must dial the full 10 digits. In the past, it was sufficient to dial only 7 digits within the same area code, but with the overlap of multiple area codes, 10-digit dialing has become the standard.

The emergency phone number is 911, which is common nationwide. To request police, fire, or emergency services in Henderson, you can connect by dialing 911. For non-emergency police inquiries, you can contact the Henderson Police Department at (702) 267-4911. General inquiries for Henderson City Hall can be made at (702) 267-2323.

Mobile services are provided by major U.S. carriers AT&T, T-Mobile, and Verizon in Henderson. 5G coverage is also available in most major areas of Henderson, with particularly reliable signals expected around downtown and shopping malls. However, some outskirts near Black Mountain may experience weaker signals.

Discount mobile phone (MVNO) services popular among Korean and Asian consumers are also active in the Las Vegas-Henderson area. Affordable plans using the networks of major carriers like Mint Mobile, Visible, and US Mobile are available, and members of the Korean community may also use services from KT Americas or LG U+ in the U.S.

Home internet services are primarily covered by Spectrum (Charter Communications) and AT&T Internet in Henderson residential areas. Gigabit internet service is available in some areas, and monthly fees vary depending on the type of service and contract terms. Many new contracts often come with promotional rates, so it's advisable to compare different providers.

Landline usage is declining, but it is still used in some homes and businesses. Spectrum, AT&T, and Google Fiber (in some areas) offer bundled packages that include TV, internet, and phone services. Landline numbers are still convenient for contacting public institutions and medical facilities that use automated response systems (IVR).

Regarding zip codes and phone numbers, if you move to a new address in Henderson, you must report a change of address to the U.S. Postal Service (USPS), which can be done online at usps.com. Number portability is also legally guaranteed, allowing you to keep your existing phone number even if you change carriers.

To make an international call to Korea, dial the international call code 011 + Korea country code 82 + area code (excluding the leading 0, such as Seoul 2, Busan 51) + number. For example, to call Seoul 02-1234-5678, you would dial 011-82-2-1234-5678. On smartphones, you can use the + symbol to enter +82-2-1234-5678. Instead of incurring international call charges from your carrier, you can use apps like KakaoTalk, Google Meet, or Zoom to make free calls in a Wi-Fi environment.

If you are moving to or visiting Henderson, preparing a U.S. SIM card or eSIM before your arrival will allow you to use it right from the airport. Local SIM cards can also be purchased at Las Vegas Airport or AT&T, T-Mobile, and Verizon stores in Henderson. You can buy a prepaid SIM card without a visa or permanent residency, even as a traveler.