Phone numbers in Ellicottcy, Maryland
Ellicottcy has 29 phone prefixes in area codes 410, 443, 667.
Biggest holders: Verizon (local phone), MCImetro (Verizon Business), Windstream (PAETEC). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 3%
- Local phone company 45%
- Internet / business phone carrier 45%
- Paging service 3%
- Phone company 3%
Every prefix in Ellicottcy
Search the first six digits of a number in this list. If it's here, the number started in Ellicottcy with the carrier shown. If it isn't, check the Maryland page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 410-203 | Verizon (local phone) | Local phone company | – |
| 410-313 | Verizon (local phone) | Local phone company | – |
| 410-418 | Verizon (local phone) | Local phone company | – |
| 410-442 | Verizon (local phone) | Local phone company | – |
| 410-461 | Verizon (local phone) | Local phone company | – |
| 410-465 | Verizon (local phone) | Local phone company | – |
| 410-480 | Verizon (local phone) | Local phone company | – |
| 410-505 | Verizon (local phone) | Local phone company | – |
| 410-680 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 410-696 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 410-720 | Verizon (local phone) | Local phone company | – |
| 410-748 | Spok | Paging service | – |
| 410-750 | Verizon (local phone) | Local phone company | – |
| 410-781 | Verizon (local phone) | Local phone company | – |
| 410-988 | Verizon (local phone) | Local phone company | – |
| 410-995 | Verizon (local phone) | Local phone company | – |
| 443-288 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 443-325 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 443-355 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 443-364 | Teleport Communications America | Internet / business phone carrier | – |
| 443-420 | Bandwidth | Internet / business phone carrier | – |
| 443-574 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 443-638 | Global Naps South | Phone company | – |
| 443-828 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 443-973 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 667-280 | Vonage America | Internet / business phone carrier | 2020 |
| 667-371 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 667-479 | Onvoy | Internet / business phone carrier | 2024 |
| 667-686 | Core Communications | Internet / business phone carrier | 2018 |
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.