U.S. Carrier Messaging Policy
A source-linked guide to carrier policy and how this authority layer fits into U.S. A2P messaging programs.
What this authority layer covers
Carrier policies and public guidance concerning approved messaging paths, consent evidence, opt-out handling, filtering, and sender behavior.
Authorities and official sources
Each entry explains what the source says, where its limits are, and what it does not establish.
Carrier policy or guidance · Current
SMS API
How this authority relates to messaging
This source provides product or service context rather than a complete messaging compliance rulebook.
What the source establishes
- Access to the AT&T business SMS interface requires special permission and is intended for established businesses or organizations sending shortcode SMS to AT&T subscribers.
Limits and important context
- The page is not a comprehensive carrier-authored 10DLC, toll-free, consent, content, or enforcement rulebook.
Official and supporting sources
Source and review details
- Jurisdiction
- U.S. messaging ecosystem
- Source type
- Carrier policy or guidance
- Current status
- Current
Carrier policy or guidance · Current
T-Mobile Consumer versus Non-Consumer Text Messaging
How this authority relates to messaging
This source states carrier, registry, or platform requirements for using the relevant messaging path.
What the source establishes
- T-Mobile treats A2P traffic as non-consumer messaging subject to approved-campaign and carrier requirements; its Code of Conduct requires sanctioned paths, appropriate consent, opt-in evidence, opt-out handling, and prohibits grey routes and consent sharing.
Limits and important context
- The support page is an overview; the Code of Conduct dated November 13, 2022 remains linked as the operative document, while campaign-specific registration, fees, and throughput details may be stated elsewhere.
Official and supporting sources
Source and review details
- Jurisdiction
- U.S. messaging ecosystem
- Source type
- Carrier policy or guidance
- Current status
- Current
Carrier policy or guidance · Current
Smishing and spam text-message guidance
How this authority relates to messaging
This source states carrier, registry, or platform requirements for using the relevant messaging path.
What the source establishes
- Organizations sending high-volume texts must obtain opt-in, use approved aggregator channels, and honor STOP requests; Verizon recognizes short code, toll-free, and 10DLC A2P channels.
Limits and important context
- The page states sender expectations but is not a complete registration, fee, throughput, or enforcement manual.
Official and supporting sources
Source and review details
- Jurisdiction
- U.S. messaging ecosystem
- Source type
- Carrier policy or guidance
- Current status
- Current
Provider or carrier product context · Current
Customer Engagement product page
How this authority relates to messaging
This source provides product or service context rather than a complete messaging compliance rulebook.
What the source establishes
- U.S. Cellular publicly offers customer-engagement and bulk-messaging capabilities.
Limits and important context
- The verified product page does not publish a carrier-authored A2P sender compliance specification.
Official and supporting sources
Source and review details
- Jurisdiction
- U.S. messaging ecosystem
- Source type
- Provider or carrier product context
- Current status
- Current
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