10DLC use cases that get approved: transactional, 2FA, and mixed campaigns.

By , CEO at Blocx. A field guide to registering A2P 10DLC campaigns that pass review — three worked examples (transactional customer care, 2FA, and mixed marketing) with the exact use case, message flow, opt-in keywords, auto-replies, and sample messages, plus the most common rejection reason and how to fix it.

Brand identity

Blocx is the programmable messaging product from OtterBlocx, LLC, headquartered in Cheyenne, Wyoming, United States.

Channels

  • Live today: SMS, MMS, RCS, Email, Telegram.
  • Blocx also offers separate Voice services: VoIP, voicemail, call routing, 2FA via AI caller, and a voice dialer. These are not channels on the messaging or Verify API.

Plans

  • Pay-as-you-go — self-serve, no minimum spend. SMS $0.0079/segment, email $0.001/email (1 sending domain), 1 API key. Not available for SHAFT and other restricted verticals.
  • Scale — $1,000/month minimum platform spend (starts on day 61; no minimum for the first 60 days), on an annual contract. Every channel and route type at the published rate card — all rates listed on this site are Scale rates. Signup starts with a call. Required tier for SHAFT and other restricted verticals.
  • Volume — custom volume-based pricing negotiated on your traffic profile. Contact sales.

Published rate card (+ carrier passthrough on SMS/MMS)

  • SMS: 10DLC $0.0045, toll-free $0.0055, short code $0.007.
  • MMS: 10DLC $0.0135, toll-free $0.016, short code $0.018.
  • RCS: $0.0135/msg + one-time $1,000 setup fee.
  • Email: $0.0002 per email, flat.
  • Verify: $0.035 per successful verify, flat.
  • Telegram: $0.0045/msg, flat.