Phone numbers in Damascus, Maryland
Damascus has 23 phone prefixes in area codes 240, 301.
Biggest holders: Verizon (local phone), Onvoy, Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 4%
- Local phone company 35%
- Internet / business phone carrier 52%
- Phone company 9%
Every prefix in Damascus
Search the first six digits of a number in this list. If it's here, the number started in Damascus with the carrier shown. If it isn't, check the Maryland page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 240-207 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 240-240 | Fractel | Internet / business phone carrier | 2020 |
| 240-308 | AT&T Mobility | Mobile carrier | – |
| 240-325 | Core Communications | Internet / business phone carrier | – |
| 240-358 | Peerless Network Of Maryland | Internet / business phone carrier | – |
| 240-365 | Baltimore-washington Telephone (bwt) | Phone company | – |
| 240-668 | Starpower Communications | Phone company | – |
| 240-745 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 240-782 | Onvoy | Internet / business phone carrier | – |
| 240-891 | Level 3 (Lumen) | Internet / business phone carrier | 2021 |
| 240-902 | Twilio | Internet / business phone carrier | 2021 |
| 240-913 | Onvoy | Internet / business phone carrier | 2016 |
| 240-957 | Bandwidth | Internet / business phone carrier | 2022 |
| 301-253 | Verizon (local phone) | Local phone company | – |
| 301-363 | Level 3 (Lumen) | Internet / business phone carrier | 2006 |
| 301-368 | Verizon (local phone) | Local phone company | – |
| 301-391 | Verizon (local phone) | Local phone company | – |
| 301-414 | Verizon (local phone) | Local phone company | – |
| 301-482 | Verizon (local phone) | Local phone company | – |
| 301-607 | Verizon (local phone) | Local phone company | – |
| 301-685 | Teleport Communications America | Internet / business phone carrier | – |
| 301-798 | Verizon (local phone) | Local phone company | – |
| 301-831 | 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.