What Does SubscriberVerify Do?

Updated July 9, 2026

SubscriberVerify is a real-time phone number verification platform for US and Canada. Before you send an SMS or place an outbound call, it checks each number for carrier, line type, deliverability, deactivated status, ported routing, litigator risk, and more — so you stop paying to reach contacts who will never connect.

In short: SubscriberVerify saves you money. Most clients immediately cut 5%–15% of monthly SMS and voice outreach spend by filtering bad numbers before campaigns run.

What happens on every lookup?

Each lookup returns structured data your team can act on in seconds — not stale carrier files from last quarter. SubscriberVerify recommends a list action (send, unsubscribe, or blacklist) based on live carrier intelligence and compliance signals.

Key features and capabilities

SubscriberVerify goes far beyond a simple “valid / invalid” check. Here is what the platform covers on every record:

• Real-time carrier lookup (DIP): Live carrier name, OCN, LRN, port status, and line type — mobile, landline, or VoIP. Identify non-mobile numbers before you text them.
• Deactivated & suspended numbers: Surface disconnected lines still sitting in your CRM. Deactivated and suspended checks are included at no extra cost.
• Ported numbers: When a subscriber switches carriers, SubscriberVerify returns the current carrier and port indicators so routes stay accurate.
• Litigator screening: Flag suspected TCPA litigators before you contact them. Litigator type and risk signals are returned in the same lookup.
• SMS deliverability: Know whether a number can receive texts — including SMS-capable landlines (~7% of landlines support messaging).
• Timezone & geo data: Time zone, state, city, and metro code for smarter send-time and dialing rules.
• Recommended action: API fields like smsEligible, doNotSms, and action synthesize multiple signals into a clear send / do-not-send recommendation.
• Optional DNC checks: Federal, state, and complainer list screening available on request for teams that need it.

How teams use SubscriberVerify

There are three main ways to run lookups — pick what fits your workflow:

• Dashboard CSV upload — Upload any list with flexible column headers. Map the phone column once and download enriched results or a cleaned mobile-only file. Ideal for one-time list scrubs. See our bulk phone validator overview.
• Real-time API — Call the lookup API before each SMS send or dial attempt. HTTPS GET/POST with JSON responses. Full reference at API documentation.
• Bulk API — Process up to 1,000 numbers per request for high-throughput list hygiene. Best for large daily volumes.

The dashboard includes daily, 30/60/90-day, and lifetime reporting — valid mobile counts, unreachable numbers, carrier breakdowns, and lookup history by campaign list.

Why real-time beats static lists

Many verification tools rely on aging database files. SubscriberVerify queries carriers in real time, so you get current port status, deactivations, and deliverability — not data from months ago. That difference shows up directly in delivery rates and wasted spend.

Teams use SubscriberVerify for:

• SMS marketing list cleaning before 10DLC campaigns
• Outbound dialer list prep — separate mobile from landline endpoints
• TCPA litigator risk reduction before high-volume outreach
• CRM and CDP enrichment with carrier and line-type fields

Coverage & pricing

Coverage: US and Canada phone numbers only.

Get started:

• Free trial — 10,000 lookups, no credit card required
• Create account — 100,000 lookups for $50
• Credits do not expire. Additional volume is available from the dashboard.

Start Free Trial Login to Dashboard

Common questions

• How often should I validate? Verify every number before texting or calling for best results. If your list is stable, monthly validation is usually enough.
• How much can I save? Most clients see 5%–15% immediate reduction in SMS and voice outreach costs.
• API docs? Yes — see subscriberverify.com/documentation for request fields, examples, and bulk API reference.
• International? US and Canada only at this time.

Ready to test your list? Run real-time carrier lookup on your contacts and see how many numbers are wasting budget. Visit SubscriberVerify or email [email protected].