Phone numbers in Delmar, Maryland
Delmar has 7 phone prefixes in area codes 410, 443, 667.
Biggest holders: Verizon Wireless, Verizon (local phone), Windstream (PAETEC). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 43%
- Local phone company 14%
- Internet / business phone carrier 43%
Every prefix in Delmar
Search the first six digits of a number in this list. If it's here, the number started in Delmar with the carrier shown. If it isn't, check the Maryland page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 410-896 | Verizon (local phone) | Local phone company | – |
| 443-359 | Verizon Wireless | Mobile carrier | – |
| 443-493 | Verizon Wireless | Mobile carrier | 2009 |
| 443-667 | Verizon Wireless | Mobile carrier | 2023 |
| 443-669 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 667-264 | MCImetro (Verizon Business) | Internet / business phone carrier | 2019 |
| 667-341 | Onvoy | Internet / business phone carrier | 2021 |
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.