Porting Phone Numbers Into Blocx
Already have a number elsewhere? Port it into Blocx and keep using it — no changes to anything published with that number. Start a port at Numbers → Port.
What you'll need
| Document | Notes |
|---|---|
| Letter of Authorization (LOA) | Signed by an authorized contact on the losing carrier's account. Template available on the port form. |
| Recent bill | Within the last 30 days, from the losing carrier. PDF or scan; must show the account number and the numbers being ported. |
| Account number at losing carrier | On the bill |
| Account PIN / passcode | Required for toll-free and some carriers; ask the losing carrier if not on the bill |
| Numbers to port | One row per number; CSV upload supported for batches |
The contact name and address on the LOA must match what the losing carrier has on file. Mismatches are the #1 reason ports get rejected — confirm before submitting.
Submitting a port request
- Open Numbers → Port.
- Click New port request.
- Upload the LOA and bill.
- Enter the losing carrier (search by name), account number, and PIN.
- Add the numbers — paste a list or upload a CSV.
- Set your target focal date (FOC) — the earliest date you'd like the port to complete. We'll negotiate with the losing carrier; the final FOC may be later.
- Submit.
Timeline
| Type | Typical timeline |
|---|---|
| US local | 7–14 business days |
| US toll-free | 2–4 business days after LOA approval |
| Canada local | 5–10 business days |
| International | Varies by country; typical 2–6 weeks |
You'll be assigned a Focal Date Due (FOC) — the date and time the port will cut over. Service on the losing carrier ends at that moment; service in Blocx begins immediately after. Cutover usually takes less than a minute.
Status updates
Track each port at Numbers → Port. Statuses:
- Submitted — we received your request.
- In review — the losing carrier is validating the LOA and bill.
- FOC scheduled — losing carrier accepted; cutover scheduled for the FOC date.
- Completed — port finished. The number is in Numbers → Manage.
- Rejected — fix the issue (shown on the request) and submit a new request.
Each transition is reflected on the port request's row at Numbers → Port and any carrier-side notices show up in the Compliance Inbox.
Common rejection reasons
| Reason | Fix |
|---|---|
| Name on LOA doesn't match carrier records | Use the exact account holder name on file |
| Address mismatch | Update the address with the losing carrier first, then resubmit |
| PIN incorrect | Call the losing carrier to retrieve or reset |
| Number not portable in this region | Check carrier-portability databases or use a different number |
| Pending change order at losing carrier | Wait for the carrier order to complete (or cancel), then port |
Avoiding downtime
- Don't cancel your contract with the losing carrier before the port completes. Canceling early releases the number to the carrier pool and the port fails.
- Don't change anything else at the losing carrier during the port (don't move billing addresses, update account holders, etc.). Any pending change blocks the port.
- Test inbound on day-1 — send a text and place a call to confirm cutover succeeded.
After the port
The number appears at Numbers → Manage. To send US application SMS, attach it to a 10DLC campaign and a messaging profile, then test with Sending Your First SMS.
Porting out
If you ever need to port a Blocx number out to another carrier, generate an LOA-ready summary on the number's detail page in Numbers → Manage. We honor port-out requests within carrier-mandated timelines and never block them.