Phone numbers in Melbourne, Florida
Melbourne has 85 phone prefixes in area code 321.
Biggest holders: AT&T (local phone), Onvoy, T-Mobile (including Sprint). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 24%
- Local phone company 25%
- Internet / business phone carrier 48%
- Paging service 1%
- Phone company 2%
Every prefix in Melbourne
Search the first six digits of a number in this list. If it's here, the number started in Melbourne with the carrier shown. If it isn't, check the Florida page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 321-215 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 321-216 | MetroPCS (T-Mobile) | Mobile carrier | 2004 |
| 321-220 | T-Mobile (including Sprint) | Mobile carrier | 2004 |
| 321-237 | Bandwidth | Internet / business phone carrier | 2011 |
| 321-265 | MetroPCS (T-Mobile) | Mobile carrier | 2011 |
| 321-272 | Teleport Communications America | Internet / business phone carrier | 2017 |
| 321-288 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 321-294 | AT&T Mobility | Mobile carrier | 2018 |
| 321-306 | MetroPCS (T-Mobile) | Mobile carrier | 2019 |
| 321-308 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 321-309 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 321-312 | Bandwidth | Internet / business phone carrier | 2014 |
| 321-326 | Level 3 (Lumen) | Internet / business phone carrier | 2019 |
| 321-327 | Teleport Communications America | Internet / business phone carrier | 2001 |
| 321-334 | AT&T Mobility | Mobile carrier | 2020 |
| 321-339 | AT&T Mobility | Mobile carrier | 2014 |
| 321-341 | Vonage America | Internet / business phone carrier | 2020 |
| 321-343 | T-Mobile (including Sprint) | Mobile carrier | 2020 |
| 321-344 | Bandwidth | Internet / business phone carrier | 2020 |
| 321-345 | Bhn IP Enabled Services | Internet / business phone carrier | 2011 |
| 321-361 | Teleport Communications America | Internet / business phone carrier | 2016 |
| 321-366 | IP Horizon | Internet / business phone carrier | 2021 |
| 321-367 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 321-369 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 321-372 | Fractel | Internet / business phone carrier | 2017 |
| 321-373 | Fusion Cloud Services | Phone company | 2003 |
| 321-374 | MetroPCS (T-Mobile) | Mobile carrier | 2021 |
| 321-378 | AT&T Mobility | Mobile carrier | 2021 |
| 321-381 | Boost / Virgin Mobile | Mobile carrier | 2022 |
| 321-389 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 321-405 | Onvoy | Internet / business phone carrier | 2014 |
| 321-409 | AT&T (local phone) | Local phone company | – |
| 321-419 | AT&T Mobility | Mobile carrier | 2015 |
| 321-429 | Bandwidth | Internet / business phone carrier | 2022 |
| 321-434 | AT&T (local phone) | Local phone company | – |
| 321-447 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 321-462 | AT&T Mobility | Mobile carrier | 2022 |
| 321-467 | T-Mobile (including Sprint) | Mobile carrier | 2023 |
| 321-471 | AT&T Mobility | Mobile carrier | 2023 |
| 321-473 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 321-477 | Fractel | Internet / business phone carrier | 2021 |
| 321-491 | Onvoy | Internet / business phone carrier | 2024 |
| 321-497 | Onvoy | Internet / business phone carrier | 2024 |
| 321-499 | Peerless Network Of Florida | Internet / business phone carrier | – |
| 321-508 | T-Mobile (including Sprint) | Mobile carrier | – |
| 321-516 | IP Horizon | Internet / business phone carrier | 2025 |
| 321-524 | Onvoy | Internet / business phone carrier | 2025 |
| 321-538 | Onvoy | Internet / business phone carrier | 2026 |
| 321-541 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 321-545 | Onvoy | Internet / business phone carrier | 2026 |
| 321-549 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 321-557 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 321-574 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 321-586 | Bandwidth | Internet / business phone carrier | 2015 |
| 321-608 | Teleport Communications America | Internet / business phone carrier | – |
| 321-655 | Onvoy | Internet / business phone carrier | 2021 |
| 321-674 | AT&T (local phone) | Local phone company | – |
| 321-676 | AT&T (local phone) | Local phone company | – |
| 321-722 | AT&T (local phone) | Local phone company | – |
| 321-723 | AT&T (local phone) | Local phone company | – |
| 321-724 | AT&T (local phone) | Local phone company | – |
| 321-725 | AT&T (local phone) | Local phone company | – |
| 321-726 | AT&T (local phone) | Local phone company | – |
| 321-727 | AT&T (local phone) | Local phone company | – |
| 321-728 | AT&T (local phone) | Local phone company | – |
| 321-729 | AT&T (local phone) | Local phone company | – |
| 321-733 | AT&T (local phone) | Local phone company | – |
| 321-768 | AT&T (local phone) | Local phone company | – |
| 321-770 | Onvoy | Internet / business phone carrier | 2025 |
| 321-802 | CenturyLink / Lumen | Local phone company | 2013 |
| 321-821 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 321-831 | Smart City Metro | Phone company | 2016 |
| 321-837 | AT&T (local phone) | Local phone company | – |
| 321-844 | Fractel | Internet / business phone carrier | 2022 |
| 321-850 | Onvoy | Internet / business phone carrier | 2024 |
| 321-872 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 321-881 | American Messaging Services | Paging service | – |
| 321-914 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 321-951 | AT&T (local phone) | Local phone company | – |
| 321-952 | AT&T (local phone) | Local phone company | – |
| 321-953 | AT&T (local phone) | Local phone company | – |
| 321-956 | AT&T (local phone) | Local phone company | – |
| 321-977 | Fractel | Internet / business phone carrier | 2021 |
| 321-984 | AT&T (local phone) | Local phone company | – |
| 321-989 | Windstream (PAETEC) | Internet / business phone carrier | – |
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.