{"id":17254,"date":"2026-09-25T12:00:29","date_gmt":"2026-09-25T06:30:29","guid":{"rendered":"https:\/\/www.fast2sms.com\/help\/dlt-hash-code-pe-tm-chain\/"},"modified":"2026-09-26T11:15:14","modified_gmt":"2026-09-26T05:45:14","slug":"dlt-hash-code-pe-tm-chain","status":"publish","type":"post","link":"https:\/\/www.fast2sms.com\/help\/dlt-hash-code-pe-tm-chain\/","title":{"rendered":"DLT Hash Code Explained: What It Is, Who Manages It &#038; Why SMS Fails Without It"},"content":{"rendered":"<p>&#8220;Ensure the Hash Code used for SMS submission matches the approved PE-TM Chain.&#8221; That single line in Jio&#8217;s regulatory notice has confused more businesses than any other, because most senders have never seen their hash code, cannot find it on any portal, and do not know who is supposed to manage it. This guide explains what the DLT hash code is, where it comes from, why the new TRAI PE-TM Binding Framework validates it on every message, and the good news: if your provider is a registered delivery telemarketer with a properly approved chain, the hash matches automatically and you never touch it.<\/p>\n<p style=\"text-align:center;margin:28px 0;\"><a href=\"https:\/\/www.fast2sms.com\" target=\"_blank\" rel=\"noopener\" style=\"display:inline-block;background:#e63329;color:#ffffff;font-size:18px;font-weight:700;padding:14px 40px;border-radius:40px;text-decoration:none;box-shadow:0 3px 8px rgba(0,0,0,0.22);margin:6px;\">Signup Now<\/a><a href=\"https:\/\/www.fast2sms.com\/meet\" target=\"_blank\" rel=\"noopener\" style=\"display:inline-block;background:#e63329;color:#ffffff;font-size:18px;font-weight:700;padding:14px 40px;border-radius:40px;text-decoration:none;box-shadow:0 3px 8px rgba(0,0,0,0.22);margin:6px;\">Schedule Free Meeting<\/a><\/p>\n<h2>What the hash code is<\/h2>\n<p>When a PE-TM chain is created and approved on a DLT platform, the platform generates an identifier that represents that exact approved chain: this Principal Entity, sending through this sequence of telemarketers, terminating at this delivery telemarketer (TM-D). That identifier is the <strong>hash code<\/strong>. Think of it as the fingerprint of the approved route.<\/p>\n<p>Every A2P SMS submitted to an operator now carries the chain identity along with the usual DLT fields (entity ID, header, template ID). The operator&#8217;s platform recomputes what the chain should be for that PE and that TM-D, and compares. Same fingerprint: the message passes. Different fingerprint: the message is flagged during monitoring, and <strong>summarily blocked<\/strong> once blocking mode is active from 30th September.<\/p>\n<h2>Where the hash code lives, and who handles it<\/h2>\n<div style=\"overflow-x:auto;\">\n<table style=\"width:100%;border-collapse:collapse;font-size:15px;\">\n<thead>\n<tr>\n<th style=\"border:1px solid #e5e7eb;padding:12px;background:#f3f4f6;text-align:left;\">Party<\/th>\n<th style=\"border:1px solid #e5e7eb;padding:12px;background:#f3f4f6;text-align:left;\">Role with the hash code<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\">DLT platform (Jio, Airtel, Vi, BSNL, Tata, Smartping)<\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\">Generates it when the PE-TM chain is approved; validates it on every message<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\">TM-D (delivery telemarketer)<\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\">Attaches the correct chain identity when submitting your traffic to the operator<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\">You (the PE)<\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\">Nothing to type. Your job is making sure the approved chain names the TM-D that actually carries your traffic<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>This is why you cannot &#8220;find your hash code&#8221; in a sender-side panel and why no field asks for it in your API call. The hash is part of the submission layer between the delivery telemarketer and the operator. A sender only ever experiences it as a match or a mismatch.<\/p>\n<h2>Why hash mismatches happen<\/h2>\n<ul>\n<li><strong>Traffic submitted by a different TM-D than the chain names.<\/strong> The most common cause: an aggregator or reseller panel hands your messages to an upstream route that is not the TM-D in your approved chain. The submitted chain identity differs from the approved one.<\/li>\n<li><strong>The upstream route changed.<\/strong> Your vendor switched delivery partners for cost or capacity. Your chain still names the old TM-D; the hash at submission now belongs to a different route.<\/li>\n<li><strong>No approved chain at all.<\/strong> Nothing was ever bound, so there is no approved fingerprint to match against, and every message mismatches.<\/li>\n<li><strong>Chain approved on one operator, missing on another.<\/strong> Bindings are per DLT platform. A chain approved on Jio does nothing for traffic terminating on Airtel.<\/li>\n<li><strong>Chain rejected or inactive.<\/strong> An approval that lapsed, was rejected, or was never final-approved by the PE means no active hash exists. See <a href=\"https:\/\/www.fast2sms.com\/help\/pe-tm-chain-status\/\">PE-TM chain status explained<\/a>.<\/li>\n<\/ul>\n<h2>How to make the hash match, permanently<\/h2>\n<p>You do not fix a hash code; you fix the chain. Three conditions make the hash match on every message:<\/p>\n<ol>\n<li><strong>The PE-TM chain is approved and active<\/strong> on each operator portal you send through.<\/li>\n<li><strong>The chain terminates at a registered TM-D<\/strong> with direct operator connectivity.<\/li>\n<li><strong>That same TM-D is the one actually submitting your traffic.<\/strong> No undeclared hops in between.<\/li>\n<\/ol>\n<p>The simplest architecture that satisfies all three is PE \u2192 TM-D, directly. That is exactly how Fast2SMS is set up:<\/p>\n<div style=\"background:#ecfdf5;border:1px solid #a7f3d0;border-left:6px solid #059669;border-radius:8px;padding:20px 24px;margin:28px 0;\">\n<p style=\"margin:0 0 6px;font-size:16px;\"><strong>Fast2SMS registered TM-D:<\/strong> SID GROUPS PRIVATE LIMITED &middot; TMD ID <strong>1702178720558766591<\/strong><\/p>\n<p style=\"margin:0;font-size:15px;\">Direct connectivity with Airtel, Jio, Smartping, BSNL and Tata. Your PE binds straight to the delivery telemarketer, Fast2SMS submits the traffic itself, and the hash matches by construction. No aggregator hop can drift.<\/p>\n<\/div>\n<p>Binding takes minutes per portal with the click-by-click guides for <a href=\"https:\/\/www.fast2sms.com\/help\/how-to-add-telemarketer-in-jio-dlt-for-pe-tm-binding-chain\/\">Jio<\/a>, <a href=\"https:\/\/www.fast2sms.com\/help\/how-to-add-telemarketer-in-airtel-dlt-for-pe-tm-binding-chain\/\">Airtel<\/a>, <a href=\"https:\/\/www.fast2sms.com\/help\/how-to-add-telemarketer-in-vilpower-vodafone-dlt-for-pe-tm-binding-chain\/\">Vi<\/a>, <a href=\"https:\/\/www.fast2sms.com\/help\/how-to-add-telemarketer-in-bsnl-dlt-for-pe-tm-binding-chain\/\">BSNL<\/a>, <a href=\"https:\/\/www.fast2sms.com\/help\/how-to-add-telemarketer-in-tata-dlt-tata-tele-service-for-pe-tm-binding-chain\/\">Tata<\/a> and <a href=\"https:\/\/www.fast2sms.com\/help\/how-to-add-telemarketer-in-smartping-or-pingconnect-videocon-dlt-for-pe-tm-binding-chain\/\">Smartping<\/a>. Existing DLT entities, sender IDs and templates carry over unchanged.<\/p>\n<div style=\"background:#eff6ff;border:1px solid #bfdbfe;border-left:6px solid #2563eb;border-radius:8px;padding:20px 24px;margin:28px 0;\">\n<p style=\"margin:0 0 8px;font-size:17px;\"><strong>Not sure whether your hash mismatches? Let our team check with you, free.<\/strong><\/p>\n<p style=\"margin:0 0 14px;font-size:15px;\">Bring your PE ID and the warning email to a free call; we will verify your chains on every operator and set the binding right. <a href=\"https:\/\/www.fast2sms.com\/meet\" target=\"_blank\" rel=\"noopener\">Schedule a free meeting<\/a>, call +91-6262778811 or email <a href=\"mailto:sales@fast2sms.com\">sales@fast2sms.com<\/a>.<\/p>\n<p style=\"text-align:center;margin:0;\"><a href=\"https:\/\/www.fast2sms.com\/meet\" target=\"_blank\" rel=\"noopener\" style=\"display:inline-block;background:#e63329;color:#ffffff;font-size:18px;font-weight:700;padding:14px 40px;border-radius:40px;text-decoration:none;box-shadow:0 3px 8px rgba(0,0,0,0.22);margin:6px;\">Schedule Free Meeting<\/a><\/p>\n<\/div>\n<h2>Hash code vs the other DLT identifiers<\/h2>\n<div style=\"overflow-x:auto;\">\n<table style=\"width:100%;border-collapse:collapse;font-size:15px;\">\n<thead>\n<tr>\n<th style=\"border:1px solid #e5e7eb;padding:12px;background:#f3f4f6;text-align:left;\">Identifier<\/th>\n<th style=\"border:1px solid #e5e7eb;padding:12px;background:#f3f4f6;text-align:left;\">Identifies<\/th>\n<th style=\"border:1px solid #e5e7eb;padding:12px;background:#f3f4f6;text-align:left;\">You manage it?<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\">Entity ID (PE ID)<\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\">Your business on DLT<\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\">Yes, entered in your panel once<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\">Header \/ Sender ID<\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\">The 6-character sender name<\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\">Yes, registered per operator<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\">Template ID<\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\">Approved message wording<\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\">Yes, per template<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\">TMD ID<\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\">The delivery telemarketer<\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\">You select it when binding the chain<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\"><strong>Hash code<\/strong><\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\">The approved PE \u2192 TM-D chain itself<\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px;\"><strong>No: generated by DLT, carried by the TM-D<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2>Watch: the PE-TM mismatch warning explained on screen<\/h2>\n<p><iframe loading=\"lazy\" title=\"PE-TM Chain Mismatch Detected? Jio DLT Warning Explained &amp; How to Fix It Before 30 September\" width=\"678\" height=\"381\" src=\"https:\/\/www.youtube.com\/embed\/Z99upV4QzNI?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<h2>Frequently asked questions<\/h2>\n<h3>What is the hash code in DLT?<\/h3>\n<p>An identifier generated by the DLT platform for an approved PE-TM chain. Operators compare it against every submitted SMS to confirm the message travelled the declared, approved route ending at the authorized TM-D.<\/p>\n<h3>Where do I find my hash code?<\/h3>\n<p>Senders do not see or enter it. It is handled at the submission layer by the delivery telemarketer. Your responsibility is the chain: approved, active, and naming the TM-D that carries your traffic.<\/p>\n<h3>Do I need to add the hash code to my API request?<\/h3>\n<p>No. Standard DLT fields (entity ID, sender ID, template ID) stay as they are. The chain identity is attached by the TM-D when handing traffic to the operator.<\/p>\n<h3>Why does my traffic show a hash mismatch?<\/h3>\n<p>Because the route that submitted it is not the route your approved chain describes: usually an aggregator or reseller vendor whose upstream TM-D differs from the one in your chain, or no chain at all.<\/p>\n<h3>Can a hash mismatch be fixed without changing vendor?<\/h3>\n<p>Only if your vendor is itself a registered TM-D and you bind your PE to their exact TMD ID on every operator. If they route through third parties, the mismatch will recur whenever their upstream changes.<\/p>\n<h3>Is Fast2SMS&#8217;s chain hash-safe?<\/h3>\n<p>Yes. Fast2SMS is the TM-D (SID GROUPS PRIVATE LIMITED, 1702178720558766591) with direct operator connectivity and submits your traffic itself, so the approved chain and the submitted route are the same thing.<\/p>\n<h3>Does the hash apply to WhatsApp or RCS?<\/h3>\n<p>No. It is part of the DLT SMS framework only.<\/p>\n<h3>Where can I get help?<\/h3>\n<p>Free meeting: <a href=\"https:\/\/www.fast2sms.com\/meet\" target=\"_blank\" rel=\"noopener\">fast2sms.com\/meet<\/a>; sales +91-6262778811 \/ <a href=\"mailto:sales@fast2sms.com\">sales@fast2sms.com<\/a>; existing accounts <a href=\"mailto:support@fast2sms.com\">support@fast2sms.com<\/a>.<\/p>\n<h2>Stop chasing a code you were never meant to manage<\/h2>\n<p>Bind your PE to a registered TM-D that submits its own traffic, and the hash takes care of itself on every message.<\/p>\n<p style=\"text-align:center;margin:28px 0;\"><a href=\"https:\/\/www.fast2sms.com\" target=\"_blank\" rel=\"noopener\" style=\"display:inline-block;background:#e63329;color:#ffffff;font-size:18px;font-weight:700;padding:14px 40px;border-radius:40px;text-decoration:none;box-shadow:0 3px 8px rgba(0,0,0,0.22);margin:6px;\">Signup Now<\/a><a href=\"https:\/\/www.fast2sms.com\/meet\" target=\"_blank\" rel=\"noopener\" style=\"display:inline-block;background:#e63329;color:#ffffff;font-size:18px;font-weight:700;padding:14px 40px;border-radius:40px;text-decoration:none;box-shadow:0 3px 8px rgba(0,0,0,0.22);margin:6px;\">Schedule Free Meeting<\/a><\/p>\n<p>Sales: +91-6262778811 &middot; <a href=\"mailto:sales@fast2sms.com\">sales@fast2sms.com<\/a> &nbsp;|&nbsp; Support: <a href=\"mailto:support@fast2sms.com\">support@fast2sms.com<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The hash code is the fingerprint of your approved PE-TM chain. Learn who generates it, why senders never see it, what causes mismatches, and how binding to a registered TM-D fixes it for good.<\/p>\n","protected":false},"author":11,"featured_media":17236,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"dlt hash code","_yoast_wpseo_title":"DLT Hash Code Explained: What It Is, Who Manages It & Why SMS Fails Without It | Fast2SMS","_yoast_wpseo_metadesc":"What the DLT hash code is, where it comes from, why the PE-TM Binding Framework validates it on every SMS, and why a direct TM-D chain makes it match automatically.","footnotes":""},"categories":[2,13],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>DLT Hash Code Explained: What It Is, Who Manages It &amp; Why SMS Fails Without It | Fast2SMS<\/title>\n<meta name=\"description\" content=\"What the DLT hash code is, where it comes from, why the PE-TM Binding Framework validates it on every SMS, and why a direct TM-D chain makes it match automatically.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.fast2sms.com\/help\/dlt-hash-code-pe-tm-chain\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DLT Hash Code Explained: What It Is, Who Manages It &amp; 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