{"id":3024,"date":"2026-09-18T18:02:39","date_gmt":"2026-09-18T12:32:39","guid":{"rendered":"https:\/\/www.smsgatewaycenter.com\/blog\/?post_type=docs&p=3024"},"modified":"2026-09-18T18:02:40","modified_gmt":"2026-09-18T12:32:40","password":"","slug":"what-are-dlt-variable-tags-and-which-one-should-i-use","status":"publish","type":"docs","link":"https:\/\/www.smsgatewaycenter.com\/blog\/kb\/what-are-dlt-variable-tags-and-which-one-should-i-use\/","title":{"rendered":"What are DLT variable tags, and which one should I use?"},"content":{"rendered":"\n

Under TRAI’s direction of 18 November 2025, every variable in a DLT content template must be tagged with the type of data it will hold<\/strong>, instead of using the generic {#var#}<\/code>. Operators check each value you send against its tag, and messages that fail the check are rejected once enforcement is fully on.<\/p>\n\n\n\n

The six tags<\/h2>\n\n\n\n
Tag<\/th>Use it for<\/th>Rules<\/th><\/tr><\/thead>
{#numeric#}<\/code><\/td>OTPs, amounts, account or order numbers made only of digits<\/td>Digits 0\u20139 only; up to 40 characters<\/td><\/tr>
{#alphanumeric#}<\/code><\/td>Names, reference IDs, ticket numbers<\/td>Letters and numbers; up to 40 characters; must not contain a link<\/td><\/tr>
{#url#}<\/code><\/td>Website and landing-page links<\/td>Up to 120 characters; must match a whitelisted URL CTA<\/td><\/tr>
{#urlott#}<\/code><\/td>App download and OTT links, such as WhatsApp links<\/td>Up to 120 characters; must match a CTA registered under OTT or APK<\/td><\/tr>
{#cbn#}<\/code><\/td>Callback numbers<\/td>3\u201314 digits; must match a whitelisted Number CTA; keep “+91” in the fixed text<\/td><\/tr>
{#email#}<\/code><\/td>Email addresses<\/td>A valid email format; up to 40 characters<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Example<\/h2>\n\n\n\n

Before: Dear {#var#}, your OTP is {#var#}. Track at {#var#}<\/code><\/p>\n\n\n\n

After: Dear {#alphanumeric#}, your OTP is {#numeric#}. Track at {#url#}<\/code><\/p>\n\n\n\n

Tips<\/h2>\n\n\n\n