Operations BroadNet answer

How do I send bulk SMS?

Last reviewed September 27, 20261 min readReviewed by BroadNet engineering

Quick answer

To send bulk SMS, connect to a provider over REST or SMPP (or upload a list to a campaign dashboard), register your sender ID, confirm every recipient has opted in, then send in throughput-managed batches while watching delivery receipts. The four things that determine success are a clean consented list, a registered sender ID, correct encoding to control segment count, and DLR monitoring so you catch failures early. See /products/bulk-sms.

Plain-language definitionVendor-neutralReviewed September 27, 2026

DiagramHow an A2P message reaches the phone

Your applicationSends over the REST API or SMPP
BroadNet platformValidates, routes and bills each message
Operator SMSCDirect operator connection
Subscriber handsetThe message is delivered

The delivery receipt (DLR) travels back along the same path to your webhook

The long answer

Everything worth knowing, nothing that isn't.

§01

Start with a clean, consented list

Bulk sending to unconsented or stale numbers wrecks delivery rates and risks regulatory penalties. Collect explicit opt-in, honour do-not-contact lists, and validate numbers with an HLR lookup before a large send. See /answers/what-is-dnc and /products/hlr-lookup.

§02

Register your sender ID

In most markets an unregistered alphanumeric sender ID is dropped by the operator firewall, so a bulk blast can silently fail at scale. Register in every target market and classify the traffic correctly. See /answers/how-to-register-sender-id.

§03

Control encoding and segments

At bulk volume, a stray Unicode character that pushes each message to two segments doubles your bill. Keep copy inside one GSM-7 segment where possible and validate with the /tools/sms-segment-calculator. See /answers/what-is-concatenated-sms.

§04

Manage throughput and timing

Send within the throughput your route allows, spread large campaigns to avoid operator spam heuristics, and respect recipients' quiet hours and timezones. BroadNet sustains up to 30,000 SMS/sec per node for high-volume campaigns. See /answers/what-is-tps.

§05

Monitor delivery receipts

Watch DLRs by country and operator, and re-route through failover if a path degrades mid-campaign. What you can't measure, you can't fix. See /answers/what-is-dlr and /answers/how-to-improve-sms-delivery-rates.

BNWritten by the BroadNet engineering team·Operating carrier-grade messaging since 2003, headquartered in Dubai·Editorial standards

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