Landlines, VoIP and mobile numbers: who can actually receive your texts
Not every phone number can receive an SMS. How landlines, VoIP and mobile numbers differ, what happens when you text the wrong kind, and how to clean a list.
·5 min read
When a text does not arrive, it is natural to blame filtering or carriers. Often the explanation is simpler: the number is not a mobile phone. Lead lists, especially older ones and those from web forms, contain landlines and other numbers that cannot receive text messages.
Knowing the difference helps you read your results correctly and avoid paying to message numbers that will never see your text.
The three kinds of numbers
A mobile number is tied to a cellular device and can receive SMS. A traditional landline is tied to a wired line and generally cannot receive text messages. VoIP numbers, which run over the internet, vary: some accept SMS and some do not, depending on the provider.
What happens when you text a landline
The message normally fails. You may see an undelivered or failed status, and, depending on how your messages are billed, you may still pay for the attempt. It also muddies your numbers: a list full of landlines looks like it has terrible delivery rates when the real issue is the list.
Why lists contain them
People fill out forms with the number they know best, which is sometimes a home or office landline. Older lists from before cell phones became universal contain many. Purchased leads are especially mixed. A single list can easily be a double-digit percentage non-mobile.
- ✓Home and office landlines entered on forms
- ✓Business main lines
- ✓Older lists from before mobile was universal
- ✓VoIP numbers that do not support SMS
Cleaning a list
Look at delivery results after the first send and flag numbers that failed for non-delivery reasons. Remove or mark them so they do not receive repeated attempts. For high-value lists, a number-lookup service can identify the line type before you send. A failed text to a likely landline is a good prompt to try a call instead.
Use the right channel
For landlines and non-SMS numbers, a phone call is the right tool. Texting and calling work best together: use your dialer for the numbers that cannot receive texts and your campaigns for the rest. Ask on your forms for a mobile number specifically to improve quality at the source.
What to do when a customer's number cannot receive texts
When a text to a customer fails and you suspect a landline, call them. Explain that you tried to text, ask for a mobile number, and, if they want texts, confirm their permission and record it. Update the contact so you are not trying the same number again.
Over time, this builds a cleaner list. Customers appreciate being asked how they prefer to be contacted, and you stop paying to send messages that cannot arrive.
Key takeaways
- →Mobile numbers can receive texts; most landlines cannot.
- →VoIP numbers vary by provider.
- →Failed messages to landlines make delivery rates look worse than they are.
- →Clean lists using delivery results, or a line-type lookup for valuable lists.
- →Call the numbers you cannot text, and ask for a mobile number on forms.
Put this into practice with Text2Sale
Import leads, create follow-up campaigns, organize replies, and connect texting, calling, and appointments in one workspace.
Frequently asked questions
Can you text a landline?
Generally no. Standard landlines cannot receive SMS, although some providers offer text-enabled landline service.
Why do my messages show as failed?
Common causes include landline or non-SMS VoIP numbers, disconnected numbers, and carrier filtering. Check the status details for a clue.
How can I get more mobile numbers from forms?
Ask for a mobile number explicitly and explain it is for texting the person back. Labeling the field clearly reduces landlines.