Phone numbers in Towson, Maryland
Towson has 97 phone prefixes in area codes 410, 443, 667.
Biggest holders: Verizon (local phone), Spok, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 30%
- Local phone company 33%
- Internet / business phone carrier 23%
- Paging service 14%
Every prefix in Towson
Search the first six digits of a number in this list. If it's here, the number started in Towson with the carrier shown. If it isn't, check the Maryland page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 410-236 | AT&T Mobility | Mobile carrier | – |
| 410-249 | Verizon (local phone) | Local phone company | – |
| 410-252 | Verizon (local phone) | Local phone company | – |
| 410-283 | Spok | Paging service | – |
| 410-296 | Verizon (local phone) | Local phone company | – |
| 410-307 | Verizon (local phone) | Local phone company | – |
| 410-308 | Verizon (local phone) | Local phone company | – |
| 410-321 | Verizon (local phone) | Local phone company | – |
| 410-324 | Verizon (local phone) | Local phone company | – |
| 410-337 | Verizon (local phone) | Local phone company | – |
| 410-339 | Verizon (local phone) | Local phone company | – |
| 410-372 | Verizon (local phone) | Local phone company | – |
| 410-373 | Spok | Paging service | – |
| 410-377 | Verizon (local phone) | Local phone company | – |
| 410-408 | Spok | Paging service | – |
| 410-427 | Teleport Communications America | Internet / business phone carrier | – |
| 410-434 | Spok | Paging service | – |
| 410-453 | Verizon (local phone) | Local phone company | – |
| 410-473 | Spok | Paging service | – |
| 410-475 | Spok | Paging service | – |
| 410-492 | Spok | Paging service | – |
| 410-494 | Verizon (local phone) | Local phone company | – |
| 410-512 | Verizon (local phone) | Local phone company | – |
| 410-560 | Verizon (local phone) | Local phone company | – |
| 410-561 | Verizon (local phone) | Local phone company | – |
| 410-583 | Verizon (local phone) | Local phone company | – |
| 410-607 | Spok | Paging service | – |
| 410-616 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 410-681 | Spok | Paging service | – |
| 410-704 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 410-716 | Verizon (local phone) | Local phone company | – |
| 410-769 | Verizon (local phone) | Local phone company | – |
| 410-790 | AT&T Mobility | Mobile carrier | – |
| 410-806 | Spok | Paging service | – |
| 410-812 | AT&T Mobility | Mobile carrier | – |
| 410-816 | Verizon Wireless | Mobile carrier | – |
| 410-821 | Verizon (local phone) | Local phone company | – |
| 410-823 | Verizon (local phone) | Local phone company | – |
| 410-825 | Verizon (local phone) | Local phone company | – |
| 410-828 | Verizon (local phone) | Local phone company | – |
| 410-830 | Verizon (local phone) | Local phone company | – |
| 410-832 | Verizon (local phone) | Local phone company | – |
| 410-839 | Spok | Paging service | – |
| 410-842 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 410-847 | Verizon (local phone) | Local phone company | – |
| 410-851 | Verizon (local phone) | Local phone company | – |
| 410-853 | Verizon (local phone) | Local phone company | – |
| 410-887 | Verizon (local phone) | Local phone company | – |
| 410-890 | Spok | Paging service | – |
| 410-894 | Spok | Paging service | – |
| 410-899 | Spok | Paging service | – |
| 410-938 | Verizon (local phone) | Local phone company | – |
| 410-967 | AT&T Mobility | Mobile carrier | – |
| 443-269 | Core Communications | Internet / business phone carrier | – |
| 443-275 | Comcast | Internet / business phone carrier | – |
| 443-279 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 443-322 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 443-377 | Verizon Wireless | Mobile carrier | 2010 |
| 443-465 | Verizon Wireless | Mobile carrier | – |
| 443-470 | Windstream (PAETEC) | Internet / business phone carrier | 2008 |
| 443-519 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 443-564 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 443-608 | AT&T Mobility | Mobile carrier | 2009 |
| 443-613 | AT&T Mobility | Mobile carrier | 2009 |
| 443-632 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 443-652 | T-Mobile (including Sprint) | Mobile carrier | – |
| 443-761 | T-Mobile (including Sprint) | Mobile carrier | 2008 |
| 443-791 | AT&T Mobility | Mobile carrier | – |
| 443-797 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 443-798 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 443-809 | Level 3 (Lumen) | Internet / business phone carrier | 2014 |
| 443-823 | Verizon Wireless | Mobile carrier | 2006 |
| 443-824 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 443-834 | Verizon Wireless | Mobile carrier | – |
| 443-841 | Verizon (local phone) | Local phone company | – |
| 443-846 | AT&T Mobility | Mobile carrier | – |
| 443-847 | Verizon Wireless | Mobile carrier | 2006 |
| 443-849 | Verizon (local phone) | Local phone company | 2001 |
| 443-862 | Verizon Wireless | Mobile carrier | 2011 |
| 443-895 | Verizon Wireless | Mobile carrier | 2007 |
| 443-900 | Verizon Wireless | Mobile carrier | 2012 |
| 443-901 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 443-912 | Core Communications | Internet / business phone carrier | 2002 |
| 443-921 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 443-935 | AT&T Mobility | Mobile carrier | 2006 |
| 443-991 | Verizon Wireless | Mobile carrier | 2011 |
| 667-206 | MetroPCS (T-Mobile) | Mobile carrier | 2013 |
| 667-251 | Level 3 (Lumen) | Internet / business phone carrier | 2014 |
| 667-275 | Verizon Wireless | Mobile carrier | 2019 |
| 667-278 | AT&T Mobility | Mobile carrier | 2020 |
| 667-294 | AT&T Mobility | Mobile carrier | 2020 |
| 667-308 | Peerless Network Of Maryland | Internet / business phone carrier | 2012 |
| 667-331 | AT&T Mobility | Mobile carrier | 2021 |
| 667-383 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 667-403 | Onvoy | Internet / business phone carrier | 2021 |
| 667-436 | T-Mobile (including Sprint) | Mobile carrier | 2023 |
| 667-548 | Onvoy | Internet / business phone carrier | 2026 |
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.