Phone numbers in Chattanooga, Tennessee
Chattanooga has 183 phone prefixes in area code 423.
Biggest holders: AT&T (local phone), AT&T Mobility, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 36%
- Local phone company 34%
- Internet / business phone carrier 23%
- Paging service 2%
- Phone company 5%
Every prefix in Chattanooga
Search the first six digits of a number in this list. If it's here, the number started in Chattanooga with the carrier shown. If it isn't, check the Tennessee page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 423-203 | Boost / Virgin Mobile | Mobile carrier | 2022 |
| 423-206 | Electric Power Board Of Chattanooga | Phone company | 2018 |
| 423-208 | AT&T Mobility | Mobile carrier | 2006 |
| 423-209 | AT&T (local phone) | Local phone company | – |
| 423-221 | Spok | Paging service | – |
| 423-227 | T-Mobile (including Sprint) | Mobile carrier | – |
| 423-240 | Verizon Wireless | Mobile carrier | – |
| 423-242 | Teleport Communications America | Internet / business phone carrier | – |
| 423-255 | T-Mobile (including Sprint) | Mobile carrier | – |
| 423-260 | Verizon Wireless | Mobile carrier | 2007 |
| 423-265 | AT&T (local phone) | Local phone company | – |
| 423-266 | AT&T (local phone) | Local phone company | – |
| 423-267 | AT&T (local phone) | Local phone company | – |
| 423-269 | Verizon Wireless | Mobile carrier | 2017 |
| 423-275 | Windstream (PAETEC) | Internet / business phone carrier | 2022 |
| 423-280 | Verizon Wireless | Mobile carrier | – |
| 423-287 | AT&T (local phone) | Local phone company | – |
| 423-290 | Verizon Wireless | Mobile carrier | – |
| 423-294 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
| 423-296 | AT&T (local phone) | Local phone company | – |
| 423-298 | AT&T (local phone) | Local phone company | – |
| 423-304 | AT&T Mobility | Mobile carrier | – |
| 423-305 | Comcast | Internet / business phone carrier | 2007 |
| 423-308 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 423-309 | Verizon Wireless | Mobile carrier | – |
| 423-313 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 423-314 | T-Mobile (including Sprint) | Mobile carrier | – |
| 423-315 | AT&T Mobility | Mobile carrier | – |
| 423-316 | T-Mobile (including Sprint) | Mobile carrier | – |
| 423-320 | AT&T Mobility | Mobile carrier | – |
| 423-321 | AT&T (local phone) | Local phone company | – |
| 423-322 | Verizon Wireless | Mobile carrier | – |
| 423-326 | AT&T (local phone) | Local phone company | – |
| 423-344 | AT&T (local phone) | Local phone company | – |
| 423-355 | AT&T Mobility | Mobile carrier | – |
| 423-356 | AT&T Mobility | Mobile carrier | 2001 |
| 423-362 | AT&T Mobility | Mobile carrier | – |
| 423-364 | AT&T Mobility | Mobile carrier | – |
| 423-385 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 423-386 | AT&T (local phone) | Local phone company | – |
| 423-394 | AT&T Mobility | Mobile carrier | – |
| 423-400 | T-Mobile (including Sprint) | Mobile carrier | – |
| 423-402 | Bandwidth | Internet / business phone carrier | 2008 |
| 423-413 | Verizon Wireless | Mobile carrier | – |
| 423-414 | Peace Communications | Phone company | 2010 |
| 423-417 | MCImetro (Verizon Business) | Internet / business phone carrier | 2017 |
| 423-421 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 423-424 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 423-425 | AT&T (local phone) | Local phone company | 2001 |
| 423-432 | T-Mobile (including Sprint) | Mobile carrier | – |
| 423-443 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 423-459 | Teleport Communications America | Internet / business phone carrier | 2018 |
| 423-463 | AT&T (local phone) | Local phone company | 2006 |
| 423-468 | Onvoy | Internet / business phone carrier | – |
| 423-475 | T-Mobile (including Sprint) | Mobile carrier | 2007 |
| 423-485 | AT&T (local phone) | Local phone company | – |
| 423-486 | Verizon Wireless | Mobile carrier | 2010 |
| 423-488 | AT&T Mobility | Mobile carrier | – |
| 423-490 | AT&T (local phone) | Local phone company | – |
| 423-493 | AT&T (local phone) | Local phone company | – |
| 423-495 | AT&T (local phone) | Local phone company | – |
| 423-497 | MetroPCS (T-Mobile) | Mobile carrier | 2017 |
| 423-498 | Electric Power Board Of Chattanooga | Phone company | 2017 |
| 423-499 | AT&T (local phone) | Local phone company | – |
| 423-503 | T-Mobile (including Sprint) | Mobile carrier | – |
| 423-504 | T-Mobile (including Sprint) | Mobile carrier | – |
| 423-505 | T-Mobile (including Sprint) | Mobile carrier | – |
| 423-508 | Teleport Communications America | Internet / business phone carrier | – |
| 423-509 | Onvoy | Internet / business phone carrier | 2008 |
| 423-510 | AT&T (local phone) | Local phone company | – |
| 423-514 | Spok | Paging service | – |
| 423-517 | AT&T (local phone) | Local phone company | – |
| 423-521 | T-Mobile (including Sprint) | Mobile carrier | 2008 |
| 423-531 | Electric Power Board Of Chattanooga | Phone company | 2008 |
| 423-535 | MCImetro (Verizon Business) | Internet / business phone carrier | 2003 |
| 423-541 | Vonage America | Internet / business phone carrier | 2018 |
| 423-544 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 423-551 | CenturyLink / Lumen | Local phone company | 2014 |
| 423-553 | AT&T (local phone) | Local phone company | – |
| 423-558 | Onvoy | Internet / business phone carrier | – |
| 423-580 | AT&T Mobility | Mobile carrier | – |
| 423-582 | AT&T (local phone) | Local phone company | 2009 |
| 423-591 | Onvoy | Internet / business phone carrier | 2008 |
| 423-593 | T-Mobile (including Sprint) | Mobile carrier | – |
| 423-595 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 423-596 | AT&T Mobility | Mobile carrier | – |
| 423-598 | AT&T Mobility | Mobile carrier | – |
| 423-602 | Nuso | Internet / business phone carrier | 2012 |
| 423-605 | Verizon Wireless | Mobile carrier | – |
| 423-618 | Verizon Wireless | Mobile carrier | – |
| 423-619 | Verizon Wireless | Mobile carrier | – |
| 423-622 | AT&T (local phone) | Local phone company | – |
| 423-624 | AT&T (local phone) | Local phone company | – |
| 423-629 | AT&T (local phone) | Local phone company | – |
| 423-633 | Telnyx | Internet / business phone carrier | 2019 |
| 423-634 | AT&T (local phone) | Local phone company | – |
| 423-635 | AT&T Mobility | Mobile carrier | – |
| 423-637 | Verizon Wireless | Mobile carrier | 2008 |
| 423-642 | AT&T (local phone) | Local phone company | – |
| 423-643 | Electric Power Board Of Chattanooga | Phone company | 2002 |
| 423-645 | AT&T Mobility | Mobile carrier | – |
| 423-648 | Electric Power Board Of Chattanooga | Phone company | – |
| 423-653 | AT&T Mobility | Mobile carrier | – |
| 423-654 | Csc Wireless | Mobile carrier | 2020 |
| 423-655 | Spok | Paging service | – |
| 423-660 | Twilio | Internet / business phone carrier | 2020 |
| 423-661 | Verizon Wireless | Mobile carrier | 2014 |
| 423-664 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 423-667 | Verizon Wireless | Mobile carrier | – |
| 423-668 | AT&T (local phone) | Local phone company | – |
| 423-671 | IP Horizon | Internet / business phone carrier | 2020 |
| 423-680 | Verizon Wireless | Mobile carrier | 2016 |
| 423-681 | Verizon Wireless | Mobile carrier | 2015 |
| 423-682 | Verizon Wireless | Mobile carrier | 2016 |
| 423-693 | Level 3 (Lumen) | Internet / business phone carrier | 2006 |
| 423-697 | AT&T (local phone) | Local phone company | – |
| 423-698 | AT&T (local phone) | Local phone company | – |
| 423-702 | Level 3 (Lumen) | Internet / business phone carrier | 2006 |
| 423-704 | AT&T Mobility | Mobile carrier | – |
| 423-708 | MetroPCS (T-Mobile) | Mobile carrier | 2014 |
| 423-710 | Comcast | Internet / business phone carrier | 2007 |
| 423-713 | Comcast | Internet / business phone carrier | 2015 |
| 423-718 | Verizon Wireless | Mobile carrier | – |
| 423-719 | Nuso | Internet / business phone carrier | 2021 |
| 423-750 | Skyetel | Internet / business phone carrier | 2021 |
| 423-751 | AT&T (local phone) | Local phone company | – |
| 423-752 | AT&T (local phone) | Local phone company | – |
| 423-755 | AT&T (local phone) | Local phone company | – |
| 423-756 | AT&T (local phone) | Local phone company | – |
| 423-757 | AT&T (local phone) | Local phone company | – |
| 423-760 | AT&T Mobility | Mobile carrier | – |
| 423-762 | Verizon Wireless | Mobile carrier | – |
| 423-763 | AT&T (local phone) | Local phone company | – |
| 423-771 | AT&T Enterprises | Phone company | 2010 |
| 423-777 | Onvoy | Internet / business phone carrier | 2014 |
| 423-778 | AT&T (local phone) | Local phone company | – |
| 423-779 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 423-785 | AT&T (local phone) | Local phone company | – |
| 423-800 | AT&T Mobility | Mobile carrier | 2011 |
| 423-802 | Verizon Wireless | Mobile carrier | – |
| 423-803 | Electric Power Board Of Chattanooga | Phone company | 2016 |
| 423-805 | Onvoy | Internet / business phone carrier | – |
| 423-821 | AT&T (local phone) | Local phone company | – |
| 423-822 | AT&T (local phone) | Local phone company | – |
| 423-825 | AT&T (local phone) | Local phone company | – |
| 423-826 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 423-827 | AT&T (local phone) | Local phone company | – |
| 423-834 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 423-838 | AT&T Mobility | Mobile carrier | – |
| 423-842 | AT&T (local phone) | Local phone company | – |
| 423-843 | AT&T (local phone) | Local phone company | – |
| 423-846 | AT&T (local phone) | Local phone company | – |
| 423-847 | AT&T (local phone) | Local phone company | – |
| 423-855 | AT&T (local phone) | Local phone company | – |
| 423-860 | Commio | Internet / business phone carrier | 2022 |
| 423-867 | AT&T (local phone) | Local phone company | – |
| 423-870 | AT&T (local phone) | Local phone company | – |
| 423-872 | Terra Nova Telecom | Internet / business phone carrier | 2023 |
| 423-874 | AT&T (local phone) | Local phone company | – |
| 423-875 | AT&T (local phone) | Local phone company | – |
| 423-876 | AT&T (local phone) | Local phone company | – |
| 423-877 | AT&T (local phone) | Local phone company | – |
| 423-882 | AT&T (local phone) | Local phone company | 2011 |
| 423-883 | AT&T (local phone) | Local phone company | – |
| 423-886 | AT&T (local phone) | Local phone company | – |
| 423-888 | Onvoy | Internet / business phone carrier | 2015 |
| 423-892 | AT&T (local phone) | Local phone company | – |
| 423-893 | AT&T (local phone) | Local phone company | – |
| 423-894 | AT&T (local phone) | Local phone company | – |
| 423-899 | AT&T (local phone) | Local phone company | – |
| 423-902 | AT&T Mobility | Mobile carrier | – |
| 423-903 | AT&T Mobility | Mobile carrier | – |
| 423-904 | Onvoy | Internet / business phone carrier | 2021 |
| 423-933 | Windstream (PAETEC) | Internet / business phone carrier | 2002 |
| 423-954 | AT&T (local phone) | Local phone company | – |
| 423-960 | Peerless Network Of Tennessee | Internet / business phone carrier | 2025 |
| 423-977 | Fractel | Internet / business phone carrier | 2019 |
| 423-978 | Wavenation | Phone company | 2025 |
| 423-980 | Onvoy | Internet / business phone carrier | 2021 |
| 423-987 | AT&T Mobility | Mobile carrier | – |
| 423-991 | AT&T Mobility | Mobile carrier | – |
| 423-993 | Hd Carrier | Internet / business phone carrier | 2025 |
| 423-994 | AT&T Mobility | Mobile carrier | 2007 |
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.