Karel Effern
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Karel Effern Email & Phone Number

Studying the art of playing saxophone and more. at No-company. (Self-employed.)
Location: Amsterdam, North Holland, Netherlands 2 work roles 3 schools
1 work email found @zonnet.nl LinkedIn matched
✓ Verified May 2026 4 data sources Profile completeness 100%

Contact Signals · 1 work email

Work email k****@zonnet.nl
LinkedIn Profile matched
3 free lookups remaining · No credit card
Role
Studying the art of playing saxophone and more.
Location
Amsterdam, North Holland, Netherlands
Company size

Who is Karel Effern? Overview

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Quick answer

Karel Effern is listed as Studying the art of playing saxophone and more. at No-company. (Self-employed.), a company with 39894 employees, based in Amsterdam, North Holland, Netherlands. AeroLeads shows a work email signal at zonnet.nl and a matched LinkedIn profile for Karel Effern.

Karel Effern previously worked as Sr. Product Manager B2B at Vodafoneziggo. Karel Effern holds Engineer’S Degree from Hogeschool Haarlem.

Company email context

Email format at No-company. (Self-employed.)

This section adds company-level context without repeating Karel Effern's masked contact details.

*@zonnet.nl
68% confidence

AeroLeads found 1 current-domain work email signal for Karel Effern. Compare company email patterns before reaching out.

Profile bio

About Karel Effern

Karel Effern is a Studying the art of playing saxophone and more. at No-company. (Self-employed.). They possess expertise in telecommunications, voip, ip, mpls, telephony and 13 more skills. They is proficient in French, German and English. Colleagues describe them as "Karel is the guy to get things done! No matter what time of the day, no matter what needs to be done. Karel has a very extensive network and a sound knowledge of the telecom industry. We have worked together on delivering leased lines to small and medium businesses. Karel has a great sense of humor and stays positive when most people would loose it! Highly recommended professional with a human touch."

Listed skills include Telecommunications, Voip, Ip, Mpls, and 14 others.

Current workplace

Karel Effern's current company

Company context helps verify the profile and gives searchers a useful next step.

No-company. (Self-employed.)
No-Company. (Self-Employed.)
Studying the art of playing saxophone and more.
Netherlands
Website
Employees
39894
AeroLeads page
2 roles

Karel Effern work experience

A career timeline built from the work history available for this profile.

Sr. Product Manager B2B

Utrecht En Omgeving, Nederland

3 education records

Karel Effern education

Education record

Ijmond Mts
FAQ

Frequently asked questions about Karel Effern

Quick answers generated from the profile data available on this page.

What company does Karel Effern work for?

Karel Effern works for No-company. (Self-employed.).

What is Karel Effern's role at No-company. (Self-employed.)?

Karel Effern is listed as Studying the art of playing saxophone and more. at No-company. (Self-employed.).

What is Karel Effern's email address?

AeroLeads has found 1 work email signal at @zonnet.nl for Karel Effern at No-company. (Self-employed.).

Where is Karel Effern based?

Karel Effern is based in Amsterdam, North Holland, Netherlands while working with No-company. (Self-employed.).

What companies has Karel Effern worked for?

Karel Effern has worked for No-Company. (Self-Employed.) and Vodafoneziggo.

How can I contact Karel Effern?

You can use AeroLeads to view verified contact signals for Karel Effern at No-company. (Self-employed.), including work email, phone, and LinkedIn data when available.

What schools did Karel Effern attend?

Karel Effern holds Engineer’S Degree from Hogeschool Haarlem.

What skills is Karel Effern known for?

Karel Effern is listed with skills including Telecommunications, Voip, Ip, Mpls, Telephony, Unified Communications, Managed Services, and Ethernet.

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