A2P SMS Routing Decision Log: An Operational Guide
A practical guide to documenting the rationale, scope, evidence, and review of routing decisions—separate from executable rules and their change history.
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Technical knowledge · A2P SMS
Routing decisions
Routing decisions
with better context.
Research and practical guidance for teams buying, selling and integrating SMS capacity.
RSS
SMS Status Webhooks: Security, Reliability, and Traceability
A design guide to receiving SMS status callbacks with prudent controls, asynchronous processing, and logs that distinguish between a received event and a verified delivery.
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A2P SMS Data Retention: How to Organize Records and Retention Periods
A guide to inventorying A2P SMS data, assigning purposes and controls, and defining retention periods without applying universal time limits.
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A2P SMS Route Canary: A Cautious Guide to Traffic Migration
What the available evidence can—and cannot—support about gradual A2P SMS route migration, including the limits of current guidance.
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A2P SMS Sender ID Approval by Country: An Operational Guide
A cautious method for verifying destination-specific requirements, documenting decisions, and managing tests and changes without assuming that approval guarantees delivery.
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A2P SMS Provider Assessment: From Due Diligence to Operational Controls
A guide to assessing the provider entity and each route separately, recording evidence and uncertainties, and setting approval conditions proportionate to risk.
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A2P SMS Route Operations Record: Statements, Conditions, and Evidence
An internal working proposal for documenting information about A2P SMS routes by separating what is stated, agreed, and observed—without treating this structure as a technical standard.
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A2P SMS Filtering: How to Investigate Content and Sender Blocks
An operational guide to distinguishing sending failures, reported statuses, and possible restrictions; gathering comparable evidence; and coordinating a responsible investigation without trying to bypass filters.
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MCC and MNC in A2P SMS: What They Indicate and Their Limitations
MCC and MNC are codes associated with mobile networks, but their meaning and scope should be verified against relevant technical documentation. Learn how to assess their use without confusing them with confirmation of an operator, coverage, or A2P SMS delivery.
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