SPARROWSPT — MD
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| PAETEC ITEL, LLC | 829J | 2 |
| VERIZON MARYLAND, INC. | 9212 | 2 |
| CORE COMMUNICATIONS, INC.- MD | 2593 | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | 1 |
| ONVOY SPECTRUM, LLC | 624H | 1 |