B2B contacts in SIC Radiotelephone Communications (4812)
RampedUp holds 5,493,036 professional profiles for Radiotelephone Communications (4812) as of the build — 1.7% of all profiles carrying a SIC code, and 0.6% of the global file. Of those, 3,034,534 carry a professional email address and 492,908 carry a mobile number. Ranked #14 of 587 SIC codes.
What the records carry
Field coverage for Radiotelephone Communications (4812), counted from the October 2026 build. The global column is there so you can see whether this slice runs above or below the file as a whole.
| Field on the record | Radiotelephone Communications (4812) records | Share of Radiotelephone Communications (4812) | Global share |
|---|---|---|---|
| Professional email | 3,034,534 | 55.2% | 19.3% |
| Personal email | 956,213 | 17.4% | 13.3% |
| Phone (any) | 5,020,787 | 91.4% | 35.3% |
| Mobile number | 492,908 | 9.0% | 7.4% |
| Primary contact record | 3,209,084 | 58.4% | 32.1% |
| All five present on one record | 178,964 | 3.3% | 1.6% |
Go deeper in the Count Explorer
Everything above is an exact count for Radiotelephone Communications (4812) on its own. To put Radiotelephone Communications (4812) together with a second filter — a title level, a job function, a company size band, a revenue band — open it in the Count Explorer. It arrives with Radiotelephone Communications (4812) already selected, and it tells you on every answer whether the number is exact or an estimate.
- Radiotelephone Communications (4812) with a mobile number492,908
- Radiotelephone Communications (4812) with a professional email address3,034,534
- Radiotelephone Communications (4812) with all five fields present178,964
Why a second filter changes the answer. The October 2026 cube holds one dimension at a time, so a count for Radiotelephone Communications (4812) on its own is read straight out of it and is exact. Combine Radiotelephone Communications (4812) with a second dimension and the cube has no such cell — the explorer estimates it, shows the ceiling it cannot exceed, and labels it an estimate rather than passing it off as a measured number.
Comparable SIC codes
The SIC codes ranked either side of Radiotelephone Communications (4812) by profile count.
| # | SIC code | Profiles | Professional email | Mobile |
|---|---|---|---|---|
| 12 | Operators Of Apartment Buildings (6513) | 6,096,881 | 2,987,081 | 1,259,186 |
| 13 | Administration of Educational Programs (9411) | 5,860,675 | 2,497,294 | 860,174 |
| 15 | Insurance Agents, Brokers & Service (6411) | 5,313,918 | 3,326,457 | 926,084 |
| 16 | Services-Computer Programming Services (7371) | 4,972,928 | 2,487,722 | 446,825 |
Questions about this slice
How many Radiotelephone Communications (4812) contacts does RampedUp have?
RampedUp holds 5,493,036 professional profiles for Radiotelephone Communications (4812) as of the October 2026 build, which is 1.7% of all profiles carrying a SIC code and 0.6% of the global file of 893,501,354.
How many Radiotelephone Communications (4812) contacts have an email address?
3,034,534 carry a professional email address (55.2% of Radiotelephone Communications (4812) records) and 956,213 carry a personal email address (17.4%).
How many Radiotelephone Communications (4812) contacts have a phone number?
5,020,787 carry a phone number of some kind (91.4%), of which 492,908 are mobile numbers (9.0% of Radiotelephone Communications (4812) records).
Need this cross-filtered?
These are exact counts for Radiotelephone Communications (4812) on its own. For Radiotelephone Communications (4812) combined with a title level, a company size or a required field, use the explorer — or ask and we will run it against the live file.