Wired telecommunications activities (SIC code 61100)
Wired telecommunications activities is UK SIC code 61100. It sits in division 61 (Telecommunications) of the SIC 2007 list. On the August 2026 Companies House register, 3,895 active UK companies list 61100 among their SIC codes. 3,241 of them list it first. That makes it the third most used code in its division.
3,895active UK companies list SIC 61100 among their codes on the public recordCompanies House · counts as of August 2026
SIC 61100 in numbers
3,895 companies is 0.08 per cent of the 5,190,464 active companies on the UK register. 61100 is the third most used of the 4 codes we track in division 61.
3,241 put 61100 first and 654, 17 per cent, list it in one of their other three slots. First code only gives the tighter list; any position gives more of them.
ACTIVE COMPANIES BY REGISTERED-OFFICE POST TOWN (WHERE THE PAPERWORK SITS, NOT NECESSARILY THE WORK) · COMPANIES HOUSE PUBLIC RECORD, AUGUST 2026
London is the largest cluster at 17 per cent and the top five post towns hold 23 per cent, so the other 77 per cent sit across the rest of the country. A regional filter narrows the list without gutting it.
A worked example: 61100, registered office in London, incorporated in the last ninety days, from a pool of 3,895. Each lead you get arrives with a working website and a real email, and the director's name when the record has one. If we cannot complete one, you pay nothing.
SIC 61100 companies, as leads
Live rows from the enriched public record. Email addresses are withheld until you sign up. Phone numbers come with paid plans.
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Division 61 is for companies that carry voice and data. Infrastructure is what separates the codes.
Related SIC codes
How to read SIC 61100
SIC 61100 reads as division 61 (telecommunications), group 611, class 6110, then the full five digits, inside section J, information and communication. A company picks its own codes, up to four, and Companies House does not check them, so 61100 is the company's own description of what it does, and 3,241 list it first where 3,895 list it anywhere.
Who sells into division 61
Most companies here resell capacity. So the wholesale carriers and their distributors sell into this division all the time, competing to sign channel partners.
About SIC 61100
How many UK companies use SIC code 61100?
3,895 active UK companies list 61100 (Wired telecommunications activities) among their registered SIC codes. Each company may register up to four. Of those, 3,241 put it first. The figures come from the August 2026 Companies House register snapshot, and count active companies only.
Which code should a VoIP provider or telecoms reseller pick?
Use 61900, other telecommunications activities. It is the standard home for VoIP services, resellers, airtime dealers and ISPs running over networks owned by others. Codes 61100 and 61200 are for companies with their own wired or wireless infrastructure. You self-select the code at incorporation and can change it on any confirmation statement. No regulator or registry approval is involved.
Find UK SIC 61100 companies
Filter Companies House by this code. Each lead arrives with a working website and a real email, or you pay nothing. 100 free leads, no card.
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