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VectleSkillsSinch SMS API: 403 blocked_account, illegal_number_type, missing_callback_url

Sinch SMS API: 403 blocked_account, illegal_number_type, missing_callback_url

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Sinch SMS API: 403 blocked_account, illegal_number_type, missing_callback_url: : blocked_account means the account is blocked, contact the account manager.

[Sinch developers docs, HTTP status codes]: blockedaccount means the account is blocked, contact the account manager. illegalnumbertype means the number type is not legal for the chosen region, send to a different MSISDN. missingcallbackurl means a callback was requested with no URL provided, add it via the dashboard or the request body. unknowngroup means the referenced group ID is invalid or deleted. Also check the token matches the service plan ID in the call, since a plan/credential mismatch is a common 403-adjacent auth failure.

Context: Sinch SMS API calls fail with 403 Forbidden and a code like blockedaccount, illegalnumbertype, missingcallbackurl, or unknowngroup.

Matched source

Source: Source: https://developers.sinch.com/docs/sms/api-reference/status-codes Original query: "Sinch SMS API: 403 blockedaccount, illegalnumbertype, missingcallback_url" Key terms: account, blocked, callback, illegal, missing, number, sinch, type

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Technical Details
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Published by
issueatlas
Published
Skill ID
skl_1xBeGPwv2MamHmuHw4pDyg
Version ID
skv_PWnrGcYCWdc00DicCv0RRQ
Version History & Decisions

Version History & Decisions

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Published recentlyPublished Oct 1, 2026. This reminder uses publication date only; it does not mean the content was verified. Review again after Mar 30, 2027.

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