Company lists · Data refreshed November 2026

Top 25 Telephony equipment service observing unit suppliers worldwide

RevenueBase identified 423 company matches for telephony equipment service observing unit suppliers worldwide as of November 2026 and tracks 4,383 professional contacts across them, including 593 with verified work emails. The United States is the largest market and Milan the largest hub.

This list covers company matches for telephony equipment service observing unit suppliers worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 2, 2026. Country and city lists for telephony equipment service observing unit suppliers follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 2, 2026 How this list was built
423Companies
4,383Contacts tracked
593Verified emails
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The 25 largest telephony equipment service observing unit suppliers worldwide

Ranked by team size
Top 25 of 423 company matches for telephony equipment service observing unit suppliers worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 2, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchUmraniye, TürkiyeHQ recorded Nov 2, 202651-200382 contacts →

Exact match

“Gentel Telecommunication was founded in 2006, for developing work areas and work opinions in telecommunication industry with its strong background and experience over 30 years.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
2Exact matchGurgaon, IndiaHQ recorded Nov 2, 2026201-500265 contacts →

Exact match

“Edge Telecom Pvt.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
3Exact matchNew Delhi, IndiaHQ recorded Nov 2, 20261,001-5,000102 contacts →

Exact match

“SAVITRI GROUP "Our objective is to recognize the user's future demands today and provide the innovative solution" Founded in Savitri Group is now equipped with 7 diversified…”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
4Exact matchMontreal, QC, CanadaHQ recorded Nov 2, 2026201-50081 contacts →

Exact match

“Established in 1970, Positron Inc.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
5Exact matchCoppell, TX, United StatesHQ recorded Nov 2, 202651-20078 contacts →

Exact match

“Clover Telecom is a leading global supplier of telecom hardware and engineering services for data, wireless, cable, and wireline networks.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
6Exact matchSan Sebastián De Los Reyes, SpainHQ recorded Nov 2, 2026201-50078 contacts →

Exact match

“Your Network is Our Business DeltaComGroup is a global supplier of top quality telecommunications systems, components and services.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
7Exact matchBudapest, HungaryHQ recorded Nov 2, 2026501-1,00067 contacts →

Exact match

“CTDI offers a full range of one-stop services to companies in the telecommunications industry throughout the world.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
8Exact matchAmsterdam, NetherlandsHQ recorded Nov 2, 202651-20064 contacts →

Exact match

“Telesol Group is a trusted and ISO 9001:2015 and ISO 27001:2013 certified IT network support partner offering a range of telecommunication services worldwide.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
9Exact matchCedar Rapids, IA, United StatesHQ recorded Nov 2, 202651-20061 contacts →

Exact match

“CellSite Solutions is a leading telecommunications equipment and services provider, including site installation and maintenance to telecommunications companies of all types and…”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
10Exact matchBarueri, BrazilHQ recorded Nov 2, 202651-20045 contacts →

Exact match

“Começamos em 1981, fabricando produtos para rede externa (Red-ex).”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
11Exact matchFairfield, NJ, United StatesHQ recorded Nov 2, 202651-20043 contacts →

Exact match

“TelQuest International is dedicated to bringing the most competitive prices and the best customer service to all of our clients.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
12Exact matchRibeirão Preto, BrazilHQ recorded Nov 2, 202651-20036 contacts →

Exact match

“Produtos de última geração dos mais renomados fornecedores da área.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
13Exact matchGurgaon, IndiaHQ recorded Nov 2, 202611-5035 contacts →

Exact match

“INVAS Technologies Private Limited was incorporated in the year 2006 with the main objective of carrying-out the business of providing Telecom Test Equipments and value added…”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
14Exact matchCroughton, United KingdomHQ recorded Nov 2, 202651-20034 contacts →

Exact match

“For nearly 30 years, we’ve been delivering benefits to global telecom operators, system integrators, OEMs, government departments and multi-national enterprise companies from our…”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
15Exact matchMalmö, SwedenHQ recorded Nov 2, 202611-5029 contacts →

Exact match

“StjärnaFyrkant erbjuder produkter, tjänster, installation och service, baserat på fast, mobil- och IP-telefoni samt komradio.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
16Exact matchUnited StatesHQ recorded Nov 2, 20261-1029 contacts →

Exact match

“Sales of Business telephone equipment along with a live tech forum, find an installer database and other telecom resources.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
17Exact matchMacclesfield, United KingdomHQ recorded Nov 2, 202611-5027 contacts →

Exact match

“Ghekko is an independent international company providing professional services within the Telecommunications hardware market, with operating offices in EMEA & North America.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
18Exact matchWorthing, United KingdomHQ recorded Nov 2, 202611-5026 contacts →

Exact match

“Best4Systems is a professional, service orientated, telecommunications equipment fulfillment company.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
19Exact matchPalmetto, FL, United StatesHQ recorded Nov 2, 202651-20026 contacts →

Exact match

“Quest Controls, Inc.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
20Exact matchWeesp, NetherlandsHQ recorded Nov 2, 202651-20026 contacts →

Exact match

“Welcome to Remotehands 247 – Your Trusted Partner in Telecom Maintenance Solutions.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
21Exact matchBirmingham, United KingdomHQ recorded Nov 2, 202611-5021 contacts →

Exact match

“After 20 years as DJM Telecom Ltd, we have grown - moved to a new Head Office in Berkshire, a new Director and three more engineers, as well as merging with Voice on Data, our…”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
22Exact matchArchdale, NC, United StatesHQ recorded Nov 2, 202611-5018 contacts →

Exact match

“TelExpress offers telecom related products, solutions and technical services quickly and competitively priced to our customers including CLECS, ILECS, ISP's, EF & I's, Utilities…”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
23Exact matchMilan, TN, IndiaHQ recorded Nov 2, 202651-20018 contacts →

Exact match

“Since 1978 Telephone Switching has been a leading provider of new and used equipment to the telecommunications industry.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
24Exact matchBethpage, NY, United StatesHQ recorded Nov 2, 202611-5018 contacts →

Exact match

“ICC has been working in communications and infrastructure in the Greater New York Area for almost 40 years, and a big part of our business has always been helping organizations…”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
25Exact matchRocky Mount, NC, United StatesHQ recorded Nov 2, 202651-20018 contacts →

Exact match

“With over 30 years of service and repair in the Telecommunications world, spanning a broad range of industry leading manufacturers, the Digital Repair family have striven to…”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase

Showing 25 of 423 telephony equipment service observing unit suppliers worldwide

See the full list, filter by size, metro and specialty, and access 593 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Telephony equipment service observing unit suppliers worldwide at a glance

As of Nov 2, 2026
13.5%Verified-email coverage
10.4Average contacts per company
11-50Median size (employees)
1.2%Largest-city concentration · Milan
Nov 2, 2026Page data refreshed

Companies by employee count

1-10
197
11-50
158
51-200
49
201-500
15
501-1,000
1
1,001-5,000
2

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage
Every country. Country and city lists for telephony equipment service observing unit suppliers are linked below.
What qualifies
Company records worldwide whose business descriptions match “telephony equipment service observing unit suppliers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 593 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on November 2, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Telephony equipment service observing unit suppliers by location

2 lists · largest first

Every Telephony equipment service observing unit suppliers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “telephony equipment service observing unit suppliers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many telephony equipment service observing unit suppliers are there worldwide?

RevenueBase identified 423 company matches for telephony equipment service observing unit suppliers worldwide as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Gentel Telekomünikasyon A.Ş tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most telephony equipment service observing unit suppliers?

The United States leads with 95 companies, followed by the United Kingdom (31). Every telephony equipment service observing unit suppliers list by country and city is linked on this page.

Which city has the most telephony equipment service observing unit suppliers?

Milan leads with 5 company records, followed by Tehran (5) and Gurgaon (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 593 professional contacts with verified work emails tracked across these 423 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 2, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.