Phone numbers in La Plata, Maryland
La Plata has 11 phone prefixes in area codes 240, 301.
Biggest holders: Peerless Network Of Maryland, Verizon (local phone), Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 27%
- Internet / business phone carrier 73%
Every prefix in La Plata
Search the first six digits of a number in this list. If it's here, the number started in La Plata with the carrier shown. If it isn't, check the Maryland page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 240-208 | Peerless Network Of Maryland | Internet / business phone carrier | – |
| 240-349 | Onvoy | Internet / business phone carrier | – |
| 240-352 | Peerless Network Of Maryland | Internet / business phone carrier | – |
| 240-523 | MCImetro (Verizon Business) | Internet / business phone carrier | 2001 |
| 240-622 | Core Communications | Internet / business phone carrier | 2018 |
| 240-776 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 240-901 | CenturyLink / Lumen | Local phone company | 2014 |
| 240-955 | Bandwidth | Internet / business phone carrier | 2022 |
| 301-392 | Verizon (local phone) | Local phone company | – |
| 301-539 | Teleport Communications America | Internet / business phone carrier | – |
| 301-934 | Verizon (local phone) | Local phone company | – |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.