Comparison

CheckThatPhone vs Vonage Number Insight: a US and Canada replacement before the February 2027 sunset

Vonage's Number Insight overview says: "Effective February 4, 2027, Vonage will sunset Vonage Number Insights," and asks customers to migrate to its Identity Insights API. If your numbers are in the US and Canada, CheckThatPhone is a replacement that returns the current carrier, line type, porting status, routing number and deliverability in one lookup, for mobiles, landlines and VoIP. 10,000 lookups a month cost $30 on our 10K plan; Identity Insights' Current Carrier insight lists at $81.90 for the same 10,000 (10,000 × $0.00819), for mobile numbers only. One CheckThatPhone lookup also includes the ported flag and routing number, recent disconnections, a send-or-not verdict for texts and location from your visitor's IP in the same call, which Identity Insights' Current Carrier doesn't, and covers landlines and VoIP too (what each includes).

Vonage's own path is Identity Insights. Its transition guide maps Number Insight's formatting, original carrier and current carrier to equivalent insights, and the new API adds SIM Swap and Subscriber Match. Its API reference has no porting-status field and no caller-name insight, and roaming and reachability move to insights whose coverage is "currently limited" and "only exposed through Vonage Virtual Operator". For numbers outside North America or for SIM Swap, Identity Insights is the better fit. If you rely on caller name (CNAM), we don't return it, and the Identity Insights API reference lists no caller-name insight.

As of October 9, 2026, read from Vonage's own developer documentation and pricing pages. Each Vonage fact links to the page it came from. A few were read later, on October 10, 2026, and are dated where they appear. Prices change, so check the source before you commit budget. CheckThatPhone is our product. How we compare vendors.

At a glance

Vonage's column covers both Number Insight, until the sunset, and Identity Insights, the API Vonage asks Number Insight customers to move to. Each cell says which one it describes.

Field mapping: Number Insight to CheckThatPhone

Number Insight's documented response fields (Standard and Advanced) and where each one lands in a CheckThatPhone response. Every field is described in our API reference.

Cost at different volumes

Number Insight's own per-level prices are no longer on Vonage's pricing pages, which now show Identity Insights, so the Vonage columns use its pay-per-request list prices (Identity Insights pricing; Vonage asks you to contact it for pricing by country). "Current + Original" assumes each requested insight is billed at list; the pages we read don't say whether an insight that returns no data is billed. CheckThatPhone is our cheapest plan for the volume, including overage.

Original Carrier alone costs less than our plans below about 85,000 lookups a month, but Vonage describes it as "not reflecting portability changes", so it can name the wrong carrier for a ported number. Current Carrier reflects porting and is documented for mobile numbers only; our lookup returns the current carrier for landlines and VoIP numbers too.

What one request includes

A lower price per request only compares like with like when the requests return the same data. One CheckThatPhone lookup also includes the ported flag and routing number, recent disconnections, a send-or-not verdict for texts and location from your visitor's IP in the same call, which a request to Vonage (Current Carrier + free Format) doesn't.

✓ included ◐ included with a limit + a separately priced package or API – not in the documented request or response

Operational terms

Commitments, limits and support, from each side's own published pages. Vonage's column describes Identity Insights unless a row says Number Insight. Where a page doesn't state a term, the table says so.

Not published means it isn't stated on the Vonage pages listed under Sources when we read them. It doesn't mean Vonage doesn't offer it. Our column follows the same rule, using only our own pricing, docs, terms and contact pages.

Which one to choose

Example request and response

A standard CheckThatPhone lookup:

curl --request POST \
  --url 'https://api.checkthatphone.com/v1/lookup' \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{"phone": "404-555-0117"}'

An illustrative response (a fictional 555 number; field names and formats match the live API). This number is ported: dipPorted is "true", the status Number Insight returned as ported, and dipLrn is the routing number it now uses.

{
  "success": true,
  "credits_used": 1,
  "data": {
    "subscriber": "4045550117",
    "optDate": "2026-10-09T14:12:40.318Z",
    "action": "send",
    "deliverable": "true",
    "reason": "",
    "nanpType": "mobile",
    "blackList": "false",
    "dip": "success",
    "dipLrn": "4045550199",
    "dipPorted": "true",
    "dipOcn": "6010",
    "dipCarrier": "AT&T",
    "dipCarrierSubType": "WIRELESS",
    "dipCarrierType": "mobile",
    "geoState": "GA",
    "geoCity": "atlanta",
    "geoCountry": "US",
    "geoSource": "area-code",
    "timezone": "America/New_York",
    "tzOffset": 5,
    "error": "false"
  }
}

Sources

Vonage pages, with the date we read each one:

• Vonage Number Insight overview (sunset notice) (read October 9, 2026)
• Vonage Number Insights Transition Guide (read October 9, 2026)
• Vonage Number Insight technical details (feature table) (read October 9, 2026)
• Vonage Number Insight API reference (read October 9, 2026)
• Vonage Number Insight Standard code snippet (read October 9, 2026)
• Vonage Number Insight Advanced (async) code snippet (read October 9, 2026)
• Vonage Number Insight pricing page (now shows the Identity Insights prices) (read October 9, 2026)
• Vonage Identity Insights pricing (read October 9, 2026 and October 10, 2026)
• Vonage API pricing overview (read October 9, 2026)
• Vonage Identity Insights API reference (read October 9, 2026 and October 10, 2026)
• Vonage Identity Insights technical details (availability table) (read October 9, 2026)
• Vonage Network Features coverage (operators by country) (read October 9, 2026)
• Vonage Identity Insights: Current Carrier guide (read October 9, 2026 and October 10, 2026)
• Vonage Identity Insights: Original Carrier guide (read October 9, 2026)
• Vonage Identity Insights: SIM Swap guide (read October 9, 2026)

CheckThatPhone figures come from our pricing page, API documentation and terms of service.

Related

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