Terms & Legal Documents
Every NumberGroup legal document in one place. Read each one online or download as PDF for your records.
NumberGroup is a trading name of Datazero Ltd, registered in England and Wales (company number 07390438), registered office International House, 36-38 Cornhill, London EC3V 3NG.
The documents below are effective 1 November 2026 and apply to orders placed and Memberships taken out on or after that date. Customers on earlier Datazero Ltd agreements remain on the terms they signed up under — these do not apply retrospectively.
Master agreement
General Conditions
The main contract between you and Datazero Ltd t/a NumberGroup. Applies to every order and Membership taken out on or after 1 November 2026.
Contract Summary
Plain-English summary of the key contract terms, as required by Ofcom General Condition C1.4 (EECC). Provided before you sign up.
Product schedules
Schedule A — Memorable Number Purchase
Terms for buying a memorable phone number outright. Covers ownership, certificate of title, resale, gifting, and porting.
Schedule B — Membership Services
Terms for NumberGroup Membership — the single annual fee giving you carrier services at supplier cost (calls, hosted PBX, handsets).
Schedule C — AI Call Intelligence Services
Terms for Call IQ, transcribed and MCP/API access: AI output can be wrong and isn't advice, your responsibilities, acceptable use, card payments and service levels.
Policies
Acceptable Use Policy
What numbers and services on the NumberGroup network may and may not be used for. Required reading for every customer.
Customer Complaints Code
How to raise a complaint, how we handle it, our stage timings, and your right to escalate to the Communications Ombudsman after 8 weeks.
Privacy Policy
What personal data we collect, why we collect it, how long we keep it, and your rights under UK GDPR.
Data Processing Addendum
The UK GDPR Article 28 processor terms for customer-controlled recordings, transcripts, AI output, extracted call data, portal, MCP and webhook data.
Sub-processors
The suppliers that process personal data for us — what each does, where, and the transfer safeguard we rely on.
Your Data Requests — Access and Deletion
How to ask for a copy of your data or for it to be deleted, how we check who you are, timescales, and what deletion covers.
Appropriate Policy Document — Voice Fingerprints
How we comply with the Data Protection Act 2018 when we use voice fingerprints to recognise withheld callers and detect nuisance and fraudulent calls.
Caller Notice Templates
Suggested call announcements and staff wording for recording, transcription, AI call intelligence and voice fingerprints.
Emergency Calling (999 & 112)
How emergency calls work on a VoIP service — why your registered address matters, what happens in a power cut, and keeping a backup. Ofcom General Condition A3 information.
Accessibility & Vulnerable Customers
How to get extra help if you have an accessibility need or are in a vulnerable circumstance, including Relay UK for deaf and hard-of-hearing users. Ofcom General Condition C5.
Call Recording, Transcription & AI
Plain-English explainer of how calls are recorded, transcribed and analysed by AI — who the controller is, where processing happens, and your rights.
Cookies Policy
The cookies and similar technologies used on numbergroup.com and how to control them.