DID pilot week: checks after the first JIT assign

The DID pilot week starts after the first JIT assign, not after catalog search.

Monitoring DLR Webhooks and Delivery Health

Once your initial assignment completes, the primary task during week one is ensuring telemetry flows correctly. Every inbound message or outbound notification relies on immediate delivery receipts (DLR) dispatched through your configured HTTP endpoints. Catch silent 404s before your customer notices missing status updates. Rather than focusing on how numbers are acquired, post-assign maintenance demands verifying that your system correctly processes incoming delivery payloads and updates database states instantly.

Verifying Inbound SMS and OTP Handshakes

During the pilot week, validate both outbound traffic and inbound SMS handshakes. High-volume application scenarios, such as two-factor authentication (2FA) or transactional OTP dispatches, require strict verification of carrier filtration. Test short-code and long-code message routing across different mobile networks to confirm high deliverability. If inbound OTP traffic drops below 95% completion during peak traffic, audit your carrier handshakes immediately.

Billing Audit and First-Month Prorate Alignment

Managing virtual numbers requires a clean accounting model. Immediately after the initial allocation, review your prepaid billing ledger to confirm that recurring fees and usage charges align with expectations. For detailed calculations on mid-cycle activations, refer to our DID first-month setup and prorate math resource. Audit your balance floor daily so an unexpected batch order does not trigger an account pause.

Operational Benchmarks for Pilot Week

To evaluate whether your pilot deployment is ready for full-scale traffic, compare your performance metrics against standard operational benchmarks during week one. Keep webhook latency under 200 milliseconds and target a DLR delivery success rate above 98%. Flag any carrier route where latency spikes during quiet hours or local traffic shifts.

Post-Assign Scaling Checklist

Before adding higher volume to your account, audit your operational setup against system limits. Accounts reaching higher processing tiers undergo a soft review near USD 1,000/month in aggregate spend. This routine safety check validates throughput stability, fraud protection parameters, and compliance status without interrupting active routing. Keep your webhook retry queue under tight observation before requesting higher TPS limits.

Start with IOSOR

After the first JIT assign this week, watch one number only. Confirm DLR webhooks return 200, the inbound OTP handshake lands, and the first-month prorate line matches the receipt. Export those three proofs before you add a second DID.

Related: Caller ID vs messaging From: voice live does not mean SMS live E.164 normalize before DID bind: plus, zeros, and spaces.

IOSOR takeaway

Pilot week is post-assign proof, not a second country and not a blast.

Do: DLR plus inbound plus first debit on the first assign. Don’t: add volume or a second number while webhooks still 404.