Phone numbers in Cumberland, Maryland
Cumberland has 31 phone prefixes in area codes 227, 240, 301.
Biggest holders: Verizon (local phone), AT&T Mobility, T-Mobile (including Sprint). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 32%
- Local phone company 29%
- Internet / business phone carrier 29%
- Phone company 10%
Every prefix in Cumberland
Search the first six digits of a number in this list. If it's here, the number started in Cumberland with the carrier shown. If it isn't, check the Maryland page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 227-293 | MCImetro (Verizon Business) | Internet / business phone carrier | 2025 |
| 240-362 | Verizon (local phone) | Local phone company | – |
| 240-378 | Core Communications | Internet / business phone carrier | – |
| 240-410 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 240-522 | MetroPCS (T-Mobile) | Mobile carrier | 2001 |
| 240-580 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 240-609 | AT&T Mobility | Mobile carrier | 2014 |
| 240-664 | Peerless Network Of Maryland | Internet / business phone carrier | 2019 |
| 240-727 | AT&T Mobility | Mobile carrier | – |
| 240-803 | AT&T Mobility | Mobile carrier | 2012 |
| 240-807 | United States Cel Md | Phone company | 2021 |
| 240-860 | Peerless Network Of Maryland | Internet / business phone carrier | 2016 |
| 240-916 | T-Mobile (including Sprint) | Mobile carrier | – |
| 240-920 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
| 240-964 | Verizon (local phone) | Local phone company | 2008 |
| 240-967 | Verizon Wireless | Mobile carrier | – |
| 240-979 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 301-268 | United States Cel Md | Phone company | – |
| 301-338 | Idt America | Internet / business phone carrier | 2006 |
| 301-697 | AT&T Mobility | Mobile carrier | – |
| 301-707 | United States Cel Md | Phone company | – |
| 301-709 | Csc Wireless | Mobile carrier | 2019 |
| 301-722 | Verizon (local phone) | Local phone company | – |
| 301-723 | Verizon (local phone) | Local phone company | – |
| 301-724 | Verizon (local phone) | Local phone company | – |
| 301-729 | Verizon (local phone) | Local phone company | – |
| 301-759 | Verizon (local phone) | Local phone company | – |
| 301-777 | Verizon (local phone) | Local phone company | – |
| 301-783 | Bandwidth | Internet / business phone carrier | – |
| 301-784 | Verizon (local phone) | Local phone company | – |
| 301-876 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
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.