CODEWITHSUNDEEP
regexsmstwiliotwilio-php
Dharmendra Yadav
Dharmendra Yadav

Reputation: 172

How to validate alphanumeric sender id for Twilio?

I am trying to figure out how can I validate an alphanumeric sender id for sending SMS via Twilio. I tried sending SMS with only numeric sender (not Twilio verified number, a random numeric sender id) and Twilio accepted that message. So I am not sure what exactly Twilio support in alphanumeric sender Id.

It would be helpful if Twilio API provides some Regular Expression for pattern matching or I could validate sender using API?

Any help in this regard would be highly appreciated.

Upvotes: 2

Views: 2259

Answers (4)

Rory
Rory

Reputation: 2496

As of June 2024 the requirements are even more lax:

Alphanumeric Sender IDs can contain up to 11 characters from the following categories:

  • Upper-case letters A - Z

  • Lower-case letters a - z Numbers 0 - 9 Spaces

  • The following special characters can be used:

    • +
    • -
    • &
    • _

  • Alphanumeric Sender IDs must contain at least one letter.

I am using this Regex with apparent success:

^(?!^[0-9&_ -]{1,11}$)([A-z&_\-+0-9 ]){1,11}$

Upvotes: 0

Casey Deriso
Casey Deriso

Reputation: 9

stumbled on this and found that twilio is now accepting more characters, I have this regex in the app im working on.

^(?=.*[a-zA-Z])([a-zA-Z0-9 +-_&]{1,11})$

Upvotes: 0

froodian
froodian

Reputation: 1

The accepted answer appears to be out-of-date here - Twilio's documentation at https://www.twilio.com/docs/sms/services/api/alphasender-resource#alphasender-properties currently states:

An Alphanumeric Sender ID string, up to 11 characters. Valid characters are A-Z, a-z, 0-9, space and dash ( - ). An Alphanumeric Sender ID string cannot be comprised of only numbers.

By that definition, I believe this would be a more appropriate regex:

/^(?=.*[a-zA-Z \-])([a-zA-Z0-9 \-]{1,11})$/gm

Upvotes: -1

Marcos Placona
Marcos Placona

Reputation: 21720

Twilio developer evangelist here.

You will be able to find documentation about alphanumeric sender id's on the What is Alphanumeric Sender ID and how do I get started? page. Specifically, if you look under What characters can I use as the sender ID? you will find the following:

You may use any combination of 1 to 11 letters, A-Z and numbers, 0-9. Both lowercase and uppercase characters are supported as well as spaces. 1 letter and no more than 11 alphanumeric characters may be used.

A regular expression for this will vary depending on the programming language you're using, and in many cases you will find the language will have helpers for those things.

Also have a look at the list of countries where this functionality is supported.

Depending on the language you're using, the following pattern should do what you want, but like I said before you may wanna add limitations to the string using your language of choice.

/^(?=.*[a-zA-Z])(?=.*[a-zA-Z0-9])([a-zA-Z0-9 ]{1,11})$/m

A live version can be seen here.

Hope this helps you

Upvotes: 6

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