What is O2's NAICS code?

O2's NAICS code is 517 (Telecommunications).

Insights

Growing Franchise Network Celfone Trading has expanded from a single unit to multiple branches since 2007, indicating a strong presence and potential for upselling additional services or equipment across existing locations.

Business Customization The company offers bespoke, flexible packages tailored to enterprise needs, presenting opportunities to provide advanced or customized telecommunications solutions for corporate clients seeking tailored connectivity options.

Recognition & Credibility Holding Silver Investors in People accreditation demonstrates a commitment to employee engagement and operational excellence, which can appeal to clients looking for reliable and reputable partners for their telecommunications requirements.

Industry Merger Activity Recent mergers involving O2Micro suggest a dynamic, evolving market environment, offering opportunities to promote innovative integrated circuit solutions and complementary technologies to emerging or expanding companies.

Technological Expertise The company’s use of advanced tools such as React, PHP, and Google Analytics indicates a tech-savvy approach, opening avenues to propose cutting-edge digital solutions or tools that enhance customer engagement and business operations.

O2 Tech Stack

O2 uses 8 technology products and services including Wix, Webpack, RequireJS, and more. Explore O2's tech stack below.

Wix

Content Management System

Webpack

Development

RequireJS

Javascript Frameworks

React

Javascript Frameworks

Polyfill

Javascript Libraries

Zepto

Javascript Libraries

PHP

Programming Languages

Google Analytics

Web Analytics

O2 Email Formats	Example	Percentage
First.Last@celfone.uk.com	John.Doe@celfone.uk.com	48%
First@celfone.uk.com	John@celfone.uk.com	2%
FirstLast@celfone.uk.com	JohnDoe@celfone.uk.com	2%
First.Last@celfone.uk.com	John.Doe@celfone.uk.com	48%

O2 Email Formats

Example

Percentage

First.Last@celfone.uk.com

John.Doe@celfone.uk.com

48%

First@celfone.uk.com

John@celfone.uk.com

FirstLast@celfone.uk.com

JohnDoe@celfone.uk.com

First.Last@celfone.uk.com

John.Doe@celfone.uk.com

48%

Frequently Asked Questions

Where is O2's headquarters located?

O2's main headquarters is located at 11-15 Guildhall Lane Leicester, England le1 5fq United Kingdom. The company has employees across 3 continents, including EuropeAsiaNorth America.

What is O2's stock symbol?

O2 is a publicly traded company; the company's stock symbol is OIIM.

What is O2's official website and social media links?

O2's official website is celfone.uk.com and has social profiles on LinkedIn.

What is O2's SIC code NAICS code?

O2's SIC code is 7299 - Miscellaneous Personal Services, Not Elsewhere Classified NAICS code is 517 - Telecommunications.

How many employees does O2 have currently?

As of March 2026, O2 has approximately 412 employees across 3 continents, including EuropeAsiaNorth America. Key team members include Hr Consultant & Recruitment Partner: A. C.Managing Director: M. S.Senior Oracle Pl/Sql Developer: V. Š.. Explore O2's employee directory with LeadIQ.

What industry does O2 belong to?

O2 operates in the Telecommunications industry.

What technology does O2 use?

O2's tech stack includes WixWebpackRequireJSReactPolyfillZeptoPHPGoogle Analytics.

What is O2's email format?

O2's email format typically follows the pattern of First.Last@celfone.uk.com. Find more O2 email formats with LeadIQ.

When was O2 founded?

O2 was founded in 2007.

O2

Q: What is O2's official website and social media links?

O2's official website is celfone.uk.com. O2 has social profiles on LinkedIn.

Q: How many employees does O2 have currently?

O2 has approximately 412 employees.

Q: What technology does O2 use?

O2's tech stack includes Twemoji, WordPress, Wix, PHP, reCAPTCHA.

TelecommunicationsEngland, United Kingdom201-500 Employees

Celfone Trading is an award-winning O2 franchise partner.

Established in 2007, Celfone Trading has grew from a single unit to multiple as well as built both Customer Relations and Business Relations Teams. 
Our Business Relations Team is positioned to offer bespoke, personal and competitive packages to support enterprises of all sizes. We tailor our handset and airtime tariffs around your needs with the flexibility to grow with you delivering a full end-to-end experience. 

Celfone Trading has received Silver Investors in People accreditation.

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O2Micro International: Opportunity Still Exists

O2micro International Ltd (OIIM) Q3 2022 Earnings Call Transcript

O2Micro to Announce Third Quarter 2022 Results on November 4, 2022

O2Micro International: The Status Quo Continues

O2's Email Address Formats