| Company | City | State / Province | Country | Phone | Website |
|---|---|---|---|---|---|
| Nicolock Paving Stones of Maryland | Frederick | MD | US | (631) 669-0700 | nicolock.com |
| Nicolock Paving Stones of New England | North Haven | CT | US | (631) 669-0700 | nicolock.com |
| Nicolock Paving Stones of New Jersey | Sparta | NJ | US | (631) 669-0700 | nicolock.com |
| Nitterhouse Masonry Products, LLC | Chambersburg | PA | US | (717) 267-4500 | nitterhousemasonry.com |
| Nitterhouse Stone | Chambersburg | PA | US | (717) 369-3773 | nitterhousemasonry.com |
| Norse Building Products, Inc. | Allenton | WI | US | (262) 629-9330 | norsebuildingproducts.com |
| Northfield Block - Berea, an Oldcastle Company | Berea | OH | US | (770) 804-3363 | belgard.biz |
| Northfield Block - Bridgeport, an Oldcastle Company | Bridgeport | MI | US | (770) 804-3363 | belgard.biz |
| Northfield Block - Mt. Eaton, an Oldcastle Company | (800) 886-5332 | belgard.biz | |||
| Northfield Block, an Oldcastle Company | Indianapolis | IN | US | (770) 804-3363 | belgard.biz |
Concrete Masonry and Hardscapes Association