Engineering activities for technical building equipment companies in Köln

Köln ·Currently listed companies in the Engineering activities for technical building equipment industry headquartered in Köln.

246 companies · 101–120 of 246

Heiming GmbH GmbH · HRB 111043 Köln (Cologne) · 2022
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Heinen Projektbau GmbH GmbH · HRB 83423 Köln (Cologne) · 2015
d5c7b21877…
Heinz Hamacher GmbH GmbH · HRB 8365 Köln (Cologne) · 1977
91fd25e92e…
Hejman Ingenieurbetrieb GmbH für Elektro- und Gebäudetechnik & Service GmbH · HRB 50215 Köln (Cologne) · 2003
8c4b29ee5e…
HGP Heribert G ü n t h e r Planung Ingenieurbüro für Elektrotechnik GmbH GmbH · HRB 13287 Köln (Cologne) · 1983
a448f14960…
HIKTEC GEBÄUDEMANAGEMENT e.K. e.K. · HRA 24780 Köln (Cologne) · 2007
f6117b90e8…
Hinz GmbH GmbH · HRB 17574 Köln (Cologne) · 1987
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HKE Systeex GmbH GmbH · HRB 113618 Köln (Cologne) · 2022
4976a0946a…
Holthausen Elektrotechnik GmbH GmbH · HRB 70314 Köln (Cologne) · 2010
66cc56b686…
Holthausen HVAC-Germany GmbH GmbH · HRB 109704 Köln (Cologne) · 2022
ff6f906676…
IAP Industrial Automation Parts & Systems GmbH GmbH · HRB 17204 Köln (Cologne) · 1987
83f9211be2…
IBH Ingenieurbüro für Haustechnik GmbH GmbH · HRB 62285 Köln (Cologne) · 2002
b6895eca15…
IBK Planungsgesellschaft mbH GmbH · HRB 114352 Köln (Cologne) · 2023
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IFBA-Institut für Bauausführungsplanung GmbH GmbH · HRB 25829 Köln (Cologne) · 1995
c02badb009…
IFR Sachverständigenbürogesellschaft für Fußbodentechnik und Raumausstattung mbH GmbH · HRB 26335 Köln (Cologne) · 2001
9b06b87e20…
IFTG Faxel und Partner GmbH GmbH · HRB 22578 Köln (Cologne) · 1992
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IGIP Holding GmbH GmbH · HRB 79218 Düsseldorf (Dusseldorf) · 2003
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IKH Ingenieurgesellschaft mbH Beratende Ingenieure für Elektrotechnik GmbH · HRB 47010 Köln (Cologne) · 1998
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ILN Ingenieurgesellschaft für Mikroprozessor-Applikationen Dipl.-Ing. B. Lucas und Dipl.-Ing. M. Nawrath mbH GmbH · HRB 20756 Köln (Cologne) · 1990
806b368c82…
inbu GmbH GmbH · HRB 19952 Bonn · 2013
1e7e26a31a…

All industries in Köln

Live API

GEThandelsregister.ai/api/v1/search-organizations

?limit=20

&skip=100

&filters={"city":"Köln","industry_code":"71.12.3","industry_scheme":"WZ2025"}

# pip install handelsregister
from handelsregister import Handelsregister

client = Handelsregister(api_key="YOUR_API_KEY")  # or set HANDELSREGISTER_API_KEY
page = client.search_organizations(
    filters={
        "city": "Köln",
        "industry_code": "71.12.3",
        "industry_scheme": "WZ2025"
    },
    limit=20,
    skip=100,
)
print(page["total"])
for item in page["results"]:
    print(item["name"], item["registration"]["register_number"])

// npm install handelsregister
import { Handelsregister } from 'handelsregister';

const client = new Handelsregister('YOUR_API_KEY'); // or set HANDELSREGISTER_API_KEY
const page = await client.searchOrganizations({
  filters: {
      "city": "Köln",
      "industry_code": "71.12.3",
      "industry_scheme": "WZ2025"
  },
  limit: 20,
  skip: 100,
});
console.log(page.total);
for (const item of page.results) {
  console.log(item.name, item.registration.register_number);
}

// npm install handelsregister
const { Handelsregister } = require('handelsregister');

const client = new Handelsregister(process.env.HANDELSREGISTER_API_KEY);
(async () => {
  const page = await client.searchOrganizations({
    filters: {
        "city": "Köln",
        "industry_code": "71.12.3",
        "industry_scheme": "WZ2025"
    },
    limit: 20,
    skip: 100,
  });
  console.log(page.total);
  for (const item of page.results) {
    console.log(item.name, item.registration.register_number);
  }
})();

curl 'https://handelsregister.ai/api/v1/search-organizations?limit=20&skip=100' \
  -H 'x-api-key: YOUR_API_KEY' \
  -G --data-urlencode 'filters={"city":"Köln","industry_code":"71.12.3","industry_scheme":"WZ2025"}'

{
    "results": [
        {
            "entity_id": "<32-char hex>",
            "name": "<string>",
            "registration": {
                "court": "<string>",
                "register_type": "<string>",
                "register_number": "<string>"
            },
            "address": {
                "house_number": "<string>",
                "street": "<string>",
                "postal_code": "<string>",
                "city": "<string>",
                "county": "<string>",
                "state": "<string>",
                "country": "<ISO country>",
                "coordinates": {
                    "latitude": "<float>",
                    "longitude": "<float>"
                }
            },
            "registration_date": "<ISO date>",
            "purpose": "<string>"
        }
    ],
    "total": "<int>",
    "meta": {
        "request_credit_cost": "<int>",
        "credits_remaining": "<int>"
    }
}

results[]

entity_id string

Stable 32-char hex identifier. Pass straight into /fetch-organization as `q`.

name string

Registered company name.

registration object

address object

Postal address with street, house_number, postal_code, city, county, state, country and coordinates (latitude/longitude).

registration_date date

Initial entry into the commercial register (ISO date).

purpose string

Stated business purpose (Unternehmensgegenstand).

top-level

total integer

Total result count for pagination.

meta.request_credit_cost integer

Credits actually charged for this call.

meta.credits_remaining integer

Account credit balance remaining after this call.

Location · Industry · Legal form · Full-text

Filters & master data — via search-organizations

City, industry, legal form, registration date: every argument combinable through the filters parameter. One REST endpoint, every German company.

Location & geo Filter by city, postal code, state and county through city, postal_code, state and county.
Industry (WZ2025) Industry segmentation via the official WZ2025 codes — industry_code combined with industry_scheme.
Legal form GmbH, AG, KG, OHG and more via legal_form_code.
Company size bs_company_size_category – small, medium, large based on balance-sheet totals.
Active status Restrict to active entries or include deleted companies via active.
Registration date Date ranges via registration_date_from and registration_date_to.
Full-text search Free-text query via the q parameter (min. 2 characters).
Pagination skip and limit (up to 30 results per call) for deep lists.
Master data per result entity_id, name, address, registration and registration_date – pass entity_id straight to /fetch-organization.

Run every filter live with an API key. Get an API key →

Code · AI-Agents · No-Code · Workflows

Drops into any stack

The search-organizations API speaks every mainstream client: REST, Python, Node, MCP for AI agents, n8n and webhook platforms.

REST API Simple GET request with the X-API-KEY header and JSON-encoded filters. Python requests, httpx or your favourite library — pass filters via json.dumps. Node.js fetch or axios with URLSearchParams. Works in edge, worker and browser runtimes. MCP Server Directly in Claude, Cursor or any MCP-aware AI client as the search_organizations tool. n8n Pre-built custom node for workflow automation — city, industry and size as filter inputs. Webhook Callable from Zapier, Make or any other webhook platform.

This list in your app

Grab an API key and filter every German company by city, industry, size and more — straight from your application. One REST endpoint, every result.

Get an API key

Filters & master data — via search-organizations

Drops into any stack

This list in your app

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