Source note · Registering A2P 10DLC in Twilio
Twilio documents Authentication+ 2FA error codes 21736 (domain not verified), 21737 (2FA expired), 21738 (email undeliverable), 21739 (failed or timed out), 21740 (invalid domain) and 21741 (code expired).
Checked 2026-10-14
- Vendor
- Twilio
- Product
- Trust Hub
- Subsystem
- A2P 10DLC Authentication+
- Deployment
- multi-tenant
- Region
- us
- Release range
- current as of 2026-10-14
- Checked
- 2026-10-14
Sources
- Troubleshooting A2P 10DLC Standard/LVS Brands — Twilio · tier 2 current vendor documentation · section 'Troubleshooting Authentication+ 2FA verification failures'
Cite this note
APA
WarmTransfer. (2026, October 14). Registering A2P 10DLC in Twilio: source note twilio-a2p-10dlc-registration-auth-plus-error-codes. WarmTransfer. https://warmtransfer.net/knowledge/claims/twilio-a2p-10dlc-registration-auth-plus-error-codes
BibTeX
@misc{warmtransfer-claim-twilio-a2p-10dlc-registration-auth-plus-error-codes,
title = {Registering A2P 10DLC in Twilio: source note twilio-a2p-10dlc-registration-auth-plus-error-codes},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/twilio-a2p-10dlc-registration-auth-plus-error-codes},
note = {Source note twilio-a2p-10dlc-registration-auth-plus-error-codes, checked 2026-10-14}
}