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Migration of Twilio Phone Numbers

Updated over a month ago

Before Moving Your Number

Ensure you have the following information and access:

US numbers:

  • Twilio Account SID (gaining for LC→Twilio, losing for Twilio→LC)

  • Destination sub-account ID (where the number will live)

  • Phone number(s) in E.164 format (e.g., +1XXXXXXXXXX)

International numbers:

  • Regulatory Bundle SID (instead of Account SID)

  • Address SID

  • Destination sub-account ID (if applicable)

  • Phone number(s) with country

  • Moving US Phone Numbers

The three moves—LC→Twilio, Twilio→LC, and LC→LC (different agencies)—follow the same flow.

First, collect the Twilio credentials that prove ownership/target for your specific case; then open a l Support ticket with your details and a cutover window. We’ll coordinate the migration end-to-end; you don’t need a Twilio ticket.

Before you start: 

US numbers: Have the relevant Twilio Account SID (gaining for LC→Twilio, losing for Twilio→LC), the destination sub-account ID, and the phone number(s).

International numbers: Have the Regulatory Bundle SID, Address SID, and the phone number(s) (include country).

Step 1: Gather Twilio credentials (when required)

These can be found in the Twilio Console under the Account Info section.

  • LC → Twilio: Gaining Twilio Account SID (destination Twilio).

  • Twilio → LC: Losing Twilio Account SID (current Twilio).

  • LC → LC (different agencies): You don't need Twilio credentials in this case.

Step 2: Obtain the Location ID consisting the phone number (or where to transfer the phone number)

Navigate to Settings → Business Profile in your SmartSquatch account to locate the Sub-account ID (also known as Location ID) of the LC Phone Sub-account holding the phone number(s).

Step 3: Open a SmartSquatch Support ticket

This ticket kicks off the migration—include the numbers, the relevant gaining/losing Twilio Account SID, the destination sub-account ID, and your preferred cutover window. SmartSquatch Support schedules and coordinates everything, then confirms when the number is live (no Twilio ticket needed).

Moving International (Non-US) Numbers

International moves follow the same two-step flow as US moves, but instead of a Twilio Account SID, you’ll use Regulatory credentials. Collect the Regulatory Bundle SID and Address SID that apply to the number’s country and number type (local or toll-free), then follow the same process as mentioned above.

Pre-checks (recommended): Ensure the bundle is approved & current, documents are valid, and any country-specific sender ID/registration (e.g., Alphanumeric Sender ID, local onboarding, emergency address) is in place for the destination.

Note: We do have a Migration guide for reference. For more, visit Moving Phone Numbers: Migration Guide

Frequently Asked Questions


Q. How long will my migration take?

1–2 business days from the time SmartSquatch Support has all required IDs (gaining/losing Twilio Account SID, destination sub-account ID) and the number list. We’ll confirm the cutover window and notify you when the number is live.

Q. Can I move multiple numbers at once?

Yes. Include a single list (CSV or inline) in your ticket and validate each number after cutover.

Q. Do A2P/Toll-Free approvals transfer automatically?

Not always. After the move, confirm numbers are attached to the correct brand/campaign or Toll-Free verification.

Q. Do past recordings/voicemails migrate?

No. Future assets follow the number after cutover. Download any historical items you need to retain.

Q. What if I need to roll back?

Reply to the ticket immediately during the cutover window; feasibility depends on the carrier and timing.

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