Proof of a Customer Service Phone Number: How to Verify, Publish and Trust Contact Lines

What “proof” means for a customer service phone number

“Proof” in the context of a customer service phone number is the combination of verifiable technical metadata and operational context that establishes the number as legitimate, owned or controlled by the stated organization, and currently active. Customers and auditors typically expect three classes of evidence: published documentation (company address, hours, and support page), telecommunications verification (carrier records, caller-ID attestation) and live operational signals (IVR prompts, call recordings or authenticated callbacks).

Providing proof is not merely about printing a number on a website. It means that the number resolves to the organization across independent verification channels (telecom lookups, business directories, regulator registries), uses anti-spoofing protections (STIR/SHAKEN where available), and is backed by a predictable support experience (published SLA, hours, escalation paths). This reduces fraud, increases customer trust and lowers dispute rates—companies that publish verified contact endpoints routinely report lower chargeback and fraud rates by measurable margins.

Technical verification methods

Start by confirming the number’s E.164 canonical form (for US: +1NPA-NXX-XXXX). Use at least two independent lookup services to obtain carrier, line type (mobile/fixed/toll-free), and porting history. Useful commercial services include Twilio Lookup, Vonage Number Insight, and NumVerify; free first-line checks are TrueCaller and Google My Business/Maps presence. If two independent lookups both indicate the same carrier and show a business owner name or Hosted PBX, that is strong technical evidence.

Validate anti-spoofing and attestation. In the U.S., STIR/SHAKEN attestation levels (A, B, C) provide provenance metadata: A = full attestation, B = partial, C = gateway/unknown. Request your carrier or SIP provider to confirm the attestation level for the number. For international numbers, check local numbering authority rules (e.g., Ofcom in the UK, ACMA in Australia) and cross-reference with the ITU E.164 registry when necessary.

• High-value verification tools: Twilio Lookup (carrier + risk flags), Vonage Number Insight (line type, porting), TrueCaller (community reports), FCC/Ofcom registries (regulatory records), and Google My Business (published business phone tied to an address and website).
• What each tool adds: Lookup APIs return timestamped JSON you can store as proof; Google My Business links the phone to an HTTPS domain; STIR/SHAKEN attestation from the terminating carrier proves call-source integrity; call-recording logs create behavioral proof for dispute resolution.

Operational and legal proof — policies, records and compliance

Operational proof must be auditable. Keep date-stamped records: provisioning invoices for the number, the contract with the telecom provider, monthly CDRs (call detail records) and periodic lookup outputs. Retain at least 12–24 months of records; many compliance regimes and litigation risk models recommend 24–36 months depending on industry (financial services commonly use 7 years for broader records, but phone records are typically kept 2–3 years unless otherwise required).

Publish clear contact policies on your support page: hours of operation (e.g., Mon–Fri 08:00–20:00 CST), expected callback windows, escalation paths and data-handling notices. If you operate toll-free numbers (800/888/877), document procurement details (provider, monthly fee, e.g., typical provider fees range from $1–$15/month per toll-free number plus per-minute charges of roughly $0.01–$0.05 depending on carrier and geography as of 2024) and attach a sample invoice or invoice redaction for auditors.

How to present verified phone numbers to customers

Design the customer-facing presentation to include multiple corroborating details: the number in E.164 format (+1 800 555 0100), a verified business address (for example: 123 Main St, Anytown, USA 12345), a support page URL (https://example.com/support), hours of operation and a “last verified” timestamp. Displaying the verification method (e.g., “Number verified via Twilio Lookup on 2025-02-10; STIR/SHAKEN attestation: A”) gives customers and compliance teams immediate context.

Offer alternate authenticated channels and make fallback options obvious: secure web chat (HTTPS), in-app support with authenticated session, and an option for an authenticated callback. For premium or high-risk transactions, require an authenticated voice channel (e.g., a callback initiated from the logged-in account) rather than relying solely on inbound caller ID, which can be forged.

• Checklist for publishing a “proven” customer service number: (1) Store and publish E.164 format, (2) Link to HTTPS support page and physical address, (3) Archive telecom provisioning invoice and the last 12 months of CDRs, (4) Record and store at least one proof-call demonstrating IVR prompts and agent identification, (5) Display last verification date and verification provider, (6) Enable STIR/SHAKEN attestation where available.

Sample formats, examples and practical tests

Example presentation block for a website: “Support: +1 800 555 0100 (Toll-Free). Business hours: Mon–Fri 08:00–20:00 CST. Verified via Twilio Lookup on 2025-02-10. For web support visit https://example.com/support. Physical office: 123 Main St, Anytown, USA 12345.” Use a sample test number such as +1 555 123 4567 for internal examples (555 is reserved for sample use in the North American Numbering Plan).

Practical verification test sequence: (1) Perform two independent API lookups and save the JSON outputs with timestamps. (2) Place an outgoing test call to the number from two different carriers and record the CLI and STIR/SHAKEN attestation metadata. (3) Cross-check the number on Google Maps/Business and TrueCaller, and save screenshots. (4) Re-verify every 90 days or after any telecom change. This sequence produces forensic evidence you can present to customers, auditors or regulators in case of dispute.

Is proof the same as notarize?

Notarize is powered by Proof, the leading identity verification platform for retailers, banks, insurers, and law firms. The Proof platform includes access to the world’s largest on-demand notary network and additional transaction management tools.

What is the phone number for Proofpoint customer service?

+1.866.714.4041
If you have any questions, please contact Support Create Case or call our support hotline at +1.585. 295.1522 or +1.866. 714.4041.

Is proof.com 24 7?

Hours of operation
The Proof platform and the Notarize Network are operational 24 hours per day, every day of the year.

How much does proof pay notaries?

The estimated total pay range for a Notary Public at Proof is $26–$44 per hour, which includes base salary and additional pay. The average Notary Public base salary at Proof is $34 per hour. The average additional pay is $0 per hour, which could include cash bonus, stock, commission, profit sharing or tips.

Does BetMGM have a customer service phone number?

Phone Numbers & Email Support Addresses by State

State	Phone Number	Service Hours (ET)
BetMGM Horse racing	862-229-0172	11 AM – 8 PM
Arizona	n/a	11 AM – 8 PM
Colorado	719-297-9169	11 AM – 8 PM
Washington D.C.	202-864-0254	11 AM – 8 PM

Where is Proof.com located?

Boston, MA
(dba Proof.com), a Delaware corporation, with offices at 867 Boylston Street, 5th Floor #1656, Boston, MA, 02116, unless the Subscriber is a credit union, in which case “Proof” means Proof.com CUSO, LLC, a Delaware limited liability company, with offices at 867 Boylston Street, 5th Floor #1656, Boston, MA, 02116.