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Original
2026-01-01
Modified
2026-03-10
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<p><strong>E.164</strong>is an international<a>phone number</a>format recommended by the International Telecommunication Union (ITU).</p>
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<p><strong>E.164</strong>is an international<a>phone number</a>format recommended by the International Telecommunication Union (ITU).</p>
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<p>Each device on the public switched telephone network (PSTN) has a unique number.</p>
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<p>Each device on the public switched telephone network (PSTN) has a unique number.</p>
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<p>An E.164 number consists of up to 15 digits:</p>
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<p>An E.164 number consists of up to 15 digits:</p>
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<ol><li><strong>Country code:</strong>The first digits identify the country or region (e.g., +1 for the United States, +44 for the United Kingdom).</li>
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<ol><li><strong>Country code:</strong>The first digits identify the country or region (e.g., +1 for the United States, +44 for the United Kingdom).</li>
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<li><strong>Area code:</strong>These numbers represent an area or mobile network code within the country (e.g., 212 for New York City). Note that this is also called a “dialing code” in some regions.</li>
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<li><strong>Area code:</strong>These numbers represent an area or mobile network code within the country (e.g., 212 for New York City). Note that this is also called a “dialing code” in some regions.</li>
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<li><strong>Local phone number:</strong>This is a unique number assigned to a person or a business.</li>
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<li><strong>Local phone number:</strong>This is a unique number assigned to a person or a business.</li>
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</ol><p>An E.164 number is a string of digits without spaces, dashes, or parentheses. For example, a New York City number in this format would be +12125551234.</p>
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</ol><p>An E.164 number is a string of digits without spaces, dashes, or parentheses. For example, a New York City number in this format would be +12125551234.</p>
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<p>The plus sign (+) before the number means you don’t need to manually add an international dialing prefix like 00 or 011 when sending a text.</p>
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<p>The plus sign (+) before the number means you don’t need to manually add an international dialing prefix like 00 or 011 when sending a text.</p>
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<h2>What role does E.164 have in SMS marketing?</h2>
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<h2>What role does E.164 have in SMS marketing?</h2>
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<p>E.164 simplifies national and global<a>SMS</a>marketing by providing a universal phone number format.</p>
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<p>E.164 simplifies national and global<a>SMS</a>marketing by providing a universal phone number format.</p>
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<p>E.164 lets you send SMS worldwide using country codes. This means you can send special offers to subscribers in Australia (+61) or announce new products in Germany (+49).</p>
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<p>E.164 lets you send SMS worldwide using country codes. This means you can send special offers to subscribers in Australia (+61) or announce new products in Germany (+49).</p>
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<p>A marketing automation platform like Klaviyo makes it easy to send SMS messages to international audiences. Import the phone numbers on your<a>subscriber list</a>to Klaviyo, segment them according to their location, and send them geo-targeted SMS messages. Klaviyo removes any extra symbols, letters, or spaces from your phone numbers to be in the E.164 format.</p>
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<p>A marketing automation platform like Klaviyo makes it easy to send SMS messages to international audiences. Import the phone numbers on your<a>subscriber list</a>to Klaviyo, segment them according to their location, and send them geo-targeted SMS messages. Klaviyo removes any extra symbols, letters, or spaces from your phone numbers to be in the E.164 format.</p>
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<p><a>Sign up for Klaviyo</a>today to optimize your SMS marketing efforts.</p>
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<p><a>Sign up for Klaviyo</a>today to optimize your SMS marketing efforts.</p>
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