01 / Reachability
Did the call actually arrive?
Place controlled calls through your normal outbound route. Verify arrival at a Spenza receiving probe, then inspect answer events and available audio evidence.
Initial scope: T-Mobile SIP probeVoice Observability · Spenza Number Intelligence
Know the number reputation.
Before it costs you
a conversation.
Is your call reaching its destination? Is your number showing as spam? What history comes with it? Bring those questions into one evidence-led evaluation.
For platforms that power business calling. US delivery testing, with reputation and history coverage scoped in your pilot.
Number Reputation · +1 214 555 1212
Scheduled test from your DID and route, three U.S. mobile networks
68/100
Number Reputation score
Spam label on one network
| Network | Rang | Presented as | Connect | Audio |
|---|---|---|---|---|
| US Cellular Provider 1 | Yes | Clean | 1.9 s | 4.4 MOS |
| US Cellular Provider 2 | No | Spam Likely | — | — |
| US Cellular Provider 3 | Yes | Clean | 2.4 s | 4.2 MOS |
- Your CDR
- Completed · 00:07
- Handset observed
- Rang on 2 of 3
- Correlated by
- Call-ID, timestamp
Built for your calling ecosystem
- CRM platforms
- VoIP providers
- Voice-AI platforms
- Contact-center software
Three questions. Distinct evidence.
Go beyond “the call connected.”
A connected status cannot tell the whole story. Evaluate delivery, recipient-facing labels and available lifecycle records separately, so your team can choose the right next step.
02 / Reputation
What does the recipient see?
Scope checks for spam labels and displayed caller identity using supported observation or data sources. Review results by carrier and observation time.
Pilot enrichment, coverage to be validated03 / Lifecycle
What history comes with it?
Assess available disconnect, reassignment and inventory-release evidence. Keep source-backed dates separate from estimates and missing history.
Depends on supplier and data accessFrom a test to a useful decision
Screen. Monitor. Investigate.
Build a pilot around the decisions your product and operations teams already make. Keep your calling infrastructure and your existing remediation workflows.
Before assignment
Evaluate candidate inventory
Review available reputation and supplier history before assigning a number. Pre-purchase call testing depends on your supplier's ability to originate from that number.
After activation
Establish a baseline
Test authorized active numbers and document which destinations, labels and history fields can be assessed. Make coverage gaps visible from the start.
When something changes
Investigate with evidence
Scope recurring checks and change alerts into your pilot. Use the findings to trigger a re-test or your existing reputation-remediation process.
Designed for platform teams
Evidence your product can act on.
Define an API and webhook integration around your accounts, numbers and support workflows. Agree on the result schema and coverage before rollout.
- Separate delivery, reputation and lifecycle results
- Source, destination and timestamp on each finding
- Explicit unknown and inconclusive states
- Change events for your existing workflows
{
"number": "+14155550142",
"delivery": {
"result": "probe_reached",
"scope": "t_mobile_sip"
},
"reputation": {
"label": "Spam Likely",
"source": "illustrative_observation"
},
"lifecycle": {
"release_date": null,
"status": "source_unavailable"
}
}Start with evidence, then expand
Bring a sample. Leave with a clearer picture.
Explore a scoped pilot using numbers with known issues and an apparently healthy comparison group. Validate what can be measured before committing to a broader deployment.
Scope and pricing agreed before testing. sales@spenza.com
- Agree on number types and carrier coverage
- Validate test access and available data sources
- Review findings, gaps and integration options
Before we start
Clear answers. Clear boundaries.
What can we evaluate first?
Start with controlled delivery testing to a T-Mobile SIP probe. Reputation observations, lifecycle enrichment, additional carriers and recurring alerts are scoped and validated for your pilot.
Can you tell whether a number has been recycled?
Only where a source supports it. Disconnect, reassignment and inventory-release records depend on your supplier and on the data access agreed for the pilot. Where a date is not source-backed, the result is returned as unknown rather than estimated.
Does a successful test mean the number is not spam-labeled?
No. Delivery and reputation are separate findings with separate sources. A call can reach the probe while the number still displays a label to recipients, which is why the two results are never merged into a single verdict.
Do you warm up numbers or guarantee better answer rates?
No. This is an evaluation service, not a remediation or traffic-shaping service. The findings are intended to inform your own registration, rotation and remediation decisions.
Do you need access to real customer conversations?
No. Testing uses controlled calls placed to Spenza receiving probes. Live customer conversations are not intercepted, recorded or sampled.