Dun & Bradstreet (DnB) company data uses US SIC for company classification (although that's obsoleted by NAICS). SIC is available in many places, even as RDF.

However, D&B have also elaborated a SIC extension (adding 4 digits to the original 4). Does anyone know if it's available somewhere? Given it's only nomenclature data I hope it won't need a commercial license, but I've heard DnB even license the use of the DUNS number...

Thanks for the Padukah dataset! However, I can't figure out what coding system it uses. Eg Row 14 has these codes:

  • 75204 Pet Washing & Grooming
  • 29103 Reptiles
  • 599930 Pet Shops

Can you relate it to either:

2 Answers 2


I found it here: https://www.dnb.com/utility-pages/dnb-demographic-firmographic-code-tables.html:


There are 2,4,6,8-digit SIC, Local Activity Type, and NAICS.


Here is a link to a dataset of businesses from Paducah, KY, which include a SIC designation.

I'm not exactly sure what's going on with these industry codes. I looked into it briefly and since it's a six-digit code I'm wondering if it's not reflecting the NAICS 2017 revision or some other weird industry code. I didn't name the columns so I'm not sure what the history of it is. I used the dataset for other purposes whenever I originally obtained it. If you do happen to be able to verify what exactly the codes are indicating let me know.

NAICS 2017 revision

  • Thanks! But Can you relate it to either SIC or NAICS? See extra question above Commented Mar 21, 2019 at 16:12
  • The attached screenshot (attached to my original answer) is what that portion of data looks like. I'm sure there is a way to take a SIC number code and "translate" it into the most similar NAICS. There may be a script online or a resource that lists which SIC counts as a specific NAICS category such that many SIC may correspond to one NAICS et cetera. I have much, much more data available like that connected to the link provided, but instead of only for Paducah, KY it's for the entire US. Commented Mar 21, 2019 at 16:34
  • The above are neither SIC nor NAICS codes, that's my point. Check the 3 codes I've picked against SIC and NAICS, and you'll see. Calling a field "SIC" doesn't make it so ;-) Commented Mar 23, 2019 at 11:15
  • I think they may be the 2017 revised NAICS codes now that I look at it (I didn't label the columns and never used the data for the industry codes). I'm attaching a screen shot or two of what I think they may actually be. Commented Mar 23, 2019 at 15:58

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