How to “Warm” your 10DLC A2P Number
Tips, tricks, and best practices for ensuring your number is NOT mistaken for a bad actor by the carriers 🙅

How to Properly "Warm-Up" your A2P 10DLC Phone Number, and what to Avoid ⚠️
Just got your new 10DLC A2P number? 👀 Congrats! 🥳🎉
🛑 But before you hit “send” on that mass text, you need to “warm” it up 🧊 ➡️ 🔥. Think of it like breaking in a new pair of shoes – you don’t want blisters (or in this case, carrier flags). In this post, we unpack the crucial steps to warm your number and avoid those dreaded spam filters 😳
Want to watch the video that inspired this post? You can check it out Here!
What is 10DLC A2P Anyway? 🤷
Let’s break it down:
- 10DLC: Simply a 10-digit long code number, like your everyday phone number.
- A2P: Application-to-Person, meaning messages sent from software to a mobile device.
Businesses use 10DLC A2P to send messages via a process called “10DLC A2P Registration,” but carriers are vigilant about spam. That’s where “warming” comes in.
Why Warming Matters: The Bad Actor Problem 🚔
Carriers monitor new numbers closely because spammers “burn” numbers by sending massive amounts of unsolicited messages until they’re blocked. You don’t want to look like one of them.
The 3-Step Warm-Up ⬆️
- Text Your Inner Circle:
- Start with friends and family. Encourage real conversations
- Avoid sending identical messages to large groups
- Keep it clean! No sexual content, harassment, or references to alcohol, firearms, or tobacco
- Conversational messaging is key
- Limit Initial Outreach:
- Begin with your most engaged customers
- Gradually increase your volume
- Manage Re-Engagement Carefully:
- Be wary of high opt-out rates (above 3% triggers red flags)
- Drip re-engagement messages into your normal traffic flow
- Understand that people change their minds, and respect opt-outs
Key Takeaways 🔑
- Carriers are watching new numbers for spam-like behavior
- Conversational messaging and low opt-out rates are crucial
- Avoid sending mass identical messages
- Avoid prohibited content
Actionable Advice 💡
- Create a simple, conversational text campaign to send to close contacts
- Segment your customer list and slowly introduce your new number to your most engaged users
- Monitor opt-out rates closely and adjust your strategy accordingly
Warming your 10DLC number is about building trust with carriers 🤝🏼. By following these steps, you’ll ensure your messages reach your customers without getting flagged 🙌. Stay tuned for our next video on carrier flags! 😎