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How HLR Lookup saves 18% on a typical SMS campaign.

Scrubbing your recipient lists with HLR Lookup before sending is the single highest-ROI thing most SMS campaigns can do.

BroadNet Editorial Team
AuthorEditorial standards
4 min read
Product · Issue 12
4 min read

e see this pattern weekly: customers send 1M-recipient campaigns, and 12–22% of the messages fail with "undelivered — invalid MSISDN." They paid for those sends anyway — submission is the billable event for most A2P operators.

The fix

Before sending, scrub the list with HLR Lookup. BroadNet's HLR Lookup costs ~$0.003 per check; a typical SMS costs $0.04. Scrubbing 1M recipients pays for itself if it removes 5%+ invalid numbers — which it almost always does.

What HLR Lookup tells you

  • Whether the MSISDN is currently active.
  • The current operator (after port-outs).
  • The original operator (what the prefix says).
  • Country and MCC/MNC.

When NOT to use HLR Lookup

Transactional sends to a small set of recipients (OTPs, alerts) don't benefit much — the per-message overhead doesn't amortize over enough messages. HLR is for batch campaigns, not for triggered transactional traffic.

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BroadNet Editorial Team

The Editorial Team publishes the BroadNet blog. Articles are written with BroadNet's regulatory affairs, product, engineering, industry research and operator solutions teams, and reviewed under our editorial standards.

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