HIGHFIELD — MD
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| BANDWIDTH.COM CLEC, LLC - MD | 071F | 1 |
| CORE COMMUNICATIONS, INC.- MD | 2593 | 1 |
| BOOST SUBSCRIBERCO L.L.C. | 490J | 1 |
| ONVOY, LLC - MD | 876D | 1 |
| VERIZON MARYLAND, INC. | 9212 | 1 |